2012년 추계 학술대회 우수논문발표상 수상자
WISET 한국공업화학회 젊은 여성 연구자상
1P-55
MeAPSO-34 촉매상에서 dimethyl ether로부터 경질 올레핀 제조
이수경·김효섭·강은지·김종석·박주식*·김영호†
충남대학교, *한국에너지기술연구원 ([email protected]†)
DME (dimethyl ether)는 석유 대체가 가능한 석탄, 천연가스 및 바이오매스 등과 같은 에너지원들로부터 합성가스 단계를 경유하여 제조할 수 있으며 연소 시 오염 물질 발생량이 적어 친환경 에너지 중의 하나로 주목받고 있다. 한편, 석유화학 기초 원료인 올레핀 제조 공정은 주로 나프타를 원료로 하고 있으나 최근 고유가로 인해 메탄올이나 DME로 부터 경질 올레핀을 제조하는 공정이 경제성 측면에서 충분히 대체 가능한 것으로 평가받고 있다. 일명 MTO/DTO (methanol to olefin/DME to olefin)라 불리어지는 이 공정은 경질 올레핀으로의 선택성이 매우 우수한 SAPO-34 촉 매를 전형적으로 사용하고 있는데, 아직까지 코크 침적이 매우 빠른 단점이 있다. 따라서 본 연구에서는 촉매 수명을 개선할 목적으로 전이 금속을 첨가하여 다양한 MeAPSO-34 구조의 촉매를 합성하였다. 제조된 촉매는 SEM, XRD, NH3-TPD, 27Al-NMR, 29Si-NMR 및 31P-NMR을 통하여 특성 분석을 하였으며, DTO 반응을 통하여 성능과 촉 매 특성 사이의 관련성을 규명하고자 하였다.
Keywords: DME (dimethyl ether), DTO (DME to olefin), Light olefins, MeSAPO-34, Metal incorporation 2P-17
Cycling Performances of Lithium Polymer Batteries assembled with In-situ Cross-linked Gel Polymer Electrolytes
최지애·윤우영*·김동원†
한양대학교, *고려대학교 ([email protected]†)
Rechargeable lithium polymer batteries have been considered to be one of the most attractive next- generation power sources. The use of a polymer electrolyte enables fabrication of safe batteries and permits the development of flexible batteries. It is well known that the addition of polar solvents could increase the ionic conductivity of those materials. Such gel polymer electrolytes encapsulate high amount of an electrolyte solution, and their ionic conductivities usually exceed 10-3 S cm-1 at 25℃. However, their mechanical strength is not good. In order to overcome this problem, the microporous membrane has been employed as a dimensional support to enhance the mechanical strength of the gel polymer electrolytes. The chemical cross-linking was proved to promote strong interfacial adhesion between the electrodes and the membrane. By using in-situ chemically cross-linked gel polymer electrolytes, we assembled lithium polymer batteries and the cycling performance was evaluated.
Keywords: In-situ cross-linking, Li Polymer batteries
2P-36
Preparation of Highly Ordered Mesoporous Metal Oxide Catalysts for Epoxidation of 1-Octene with Hydrogen Peroxide
이은옥·Mingshi Jin·김지만† 성균관대학교 ([email protected]†)
The epoxidation of alkene and cycloakene has recevied the great attention in the manufacture of fine chemicals due to the importance of epoxides. Until now, epoxides are produced by a large peracid as oxidant.
However, peracid has many disadvantages such as expensive, hazardous, and acid waste. So hydrogen peroxide is an ideal oxidant for epoxidation of 1-octene because of its ease of handling and high activity as oxidant, as well as the fact that byproduct is natural product, namely water. In this study, to develop catalysts for the epoxidation, the epoxidation reaction of the 1-octene and H2O2 as oxidant were carried out. A series of highly ordered mesoporous metal oxides were successfully synthesized using mesoporous KIT-6 as a hard template via nano-replication method. The physicochemical properties of as-prepared catalyts were characterized by X-ray diffraction, N2 sorption, scanning electron microscope, and temperature programmed reduction.
Keywords: Epoxidation, 1-Octene, Mesoporous Material
대학원우수논문
1LA-3
Fabrication and Property of segmented-in-Series Solid Oxide Fuel Cell-Stack Fabricated Using Decalcomania method
안용태*,**·지미정**·구자빈**·신상호**·최진훈**·황해진*·최병현**,†
*인하대학교, **한국세라믹기술원 ([email protected]†)
A simple and feasible technique developed successfully to fabricated the flattened tube segmented-in-series solid oxide fuel cell (SOFC) stack. The flattened tube PSZ support was fabricated by the extrusion technique.
The NiO-YSZ anode and the yttria-stabilized zirconia (YSZ) electrolyte layers were deposited onto the PSZ support by the decalcomania method. After sintering at 1450℃ for 4h, a dense and crack-free YSZ layer with thickness of about 20㎛ is successfully obtained. After, the multi-layered cathode composed of LSM-YSZ composite, LSM were deposited onto the sintered PSZ support by the decalcomania method and sintered at 1250℃. The performance of the flattened tubu SIS-SOFC cell and sub module electrically connected by the Ag-glass interconnect was measured and analysed with different operating temperature.
Keywords: SOFC, segmented-in-series, decalcomania
구두발표
1LA-5
Hydrogen storage behaviors of graphene oxide 이슬이·박수진†
인하대학교 ([email protected]†)
In this work, we have prepared graphene oxide with a well-controlled graphite interlayer by a modified Hummer’s method for hydrogen storage behaviors. The surface specific elements of the samples were confirmed by XPS. Textural properties were analyzed using nitrogen adsorption isotherms at 77 K. The hydrogen storage capacity was evaluated by BEL-HP at 298 K in pressure swing adsorption. From the results, it was found that the hydrogen storage capacity correlated well with the specific surface area determined by applying BET equation on nitrogen adsorption isotherms.
Keywords: Hydrogen storage capacity, Graphene oxide, XPS, BET 1LA-2
Mesoscopic modeling of graphene nanosheet and its self-assembly behavior in surfactant solution by dissipative particle dynamics simulation
민사훈·이충현·장정식†
서울대학교 ([email protected]†)
A coarse-grained (CG) graphene model for dissipative particle dynamics (DPD) was proposed by grouping six carbon atoms into a CG bead with bond stretch and angle bend restraints in order to investigate the self- assembly of graphene nanosheet in surfactant solution. The additional bond and angle bend constants was calibrated by structural characteristics analysis. The self-assembly phenomena of a graphene nanosheet with a micelle consisting of CG sodium dodecyl sulphate (SDS) surfactant as well as with surfactant molecules were observed. In particular, the DPD simulations with surfactant concentration were performed to confirm the equilibrium structure of graphene/SDS surfactants.
Keywords: Graphene, Dissipative particle dynamics, Simulation 1LA-7
High efficiency polymer solar cells using stamp transfer printing process 조용주·이준엽†
단국대학교 ([email protected]†)
We controlled the vertical phase separation and crystallinity of the photoactive layer for efficient hole and electron transport and collection. A photoactive layer based on a blend of poly(3-hexylthiophen) (P3HT) and indene-C60 bisadduct (ICBA) was deposited on hole extraction layer using PDMS stamp transfer process. The stamp transfer process increased the shot circuit current density (JSC) from 7.05 mA/cm2 to 7.97 mA/cm2 and
the fill factor was increased from 0.62 to 0.67 because of reduced series resistance. As a result, power conversion efficiency (PCE) of P3HT device was increased from 3.74% to 4.54%.
Keywords: PDMS stamp, solar cell, vertical phase separation
포스터발표
[고분자] 1P-2
Subwavelength Gratings with yellow and red electrochromic Polymer for Color Intensity modulation
신해진·김병관·양욱·김은경†
연세대학교 ([email protected]†)
A single electrochromic(EC) device with subwavelength gratings provides all spectral colors and modulation of color intensity reversibly by applying a low external voltage between -2 and 2V. Subwavelength gratings with electroactive polymers such as poly(3-hexylthiophene) (P3HT) and poly(3,4-propylenedioxythiophene- phenylene) (P(ProDOT-Ph)) controlled the color intensity for various visible colors of diffracted light. Under the fixed incident angle of a white light, the color intensity of the diffracted light was reversibly switched from the maximum value down to 15% (85% decrease) due to electrochemical reaction. All spectral colors including red, green, and blue were generated by changing the angle of incidence, and the intensity of each color was modulated electrochemically at a single EC device. Both ESWGs showed a memory effect, keeping their color and intensity even after power was turned off for longer than 40 hours.
Keywords: Conducting polymer, Subwavelength grating, Diffraction [고분자] 2P-1
Effects of Reactive Compatibilizers on the Morphology and Properties of Natural Rubber/SiO2 Composites 이민영·김수경†
전남대학교 고분자공학과 ([email protected]†)
Maleimidopropyltriethoxysilane grafted natural rubber (MISNR) were prepared by reaction of maleic anhydride grafted natural rubber (MNR) and 3-aminopropyl triethoxysilane (APTES). MISNR were used as the compatibilizer of Natural rubber (NR)/SiO2 composites. NR/SiO2 composites were prepared by 3 step mixing procedures including the masterbatching process. The final mixtures were cured with optimum cure condition, which was established by the rheometer. The effects of compositional variation and the amounts of compatibilizer in the composites on the cure characteristics, morphology, thermal stability, physical and mechanical behaviors were investigated. The composites having MISNR had shown cure characteristics, physical and mechanical properties superior to those without MISNR. SiO2 particles in the former appeared to be more uniform and reduced in size compared with the latter.
Keywords: natural rubber, SiO2, reactive compatibilizer, maleic anhydride grafted natural rubber, 3-aminopro- pyltriethoxysilane
[나노] 1P-13
Mussel-inspired smart polymer coating of nanoporous membrane for thermally-controlled surface wettability 김지선·남윤성†
한국과학기술원 ([email protected]†)
Polymer coatings of nanoporous materials have attracted increasing attention for controlled mass transport applications. However, most of the available techniques are based on surface-initiated polymerizztion that requires additional pre-treatment for surface activation. Here we report a facile one-step method to modifiy the pore surface of an anodized aluminum oxide (AAO) membrane using universal adhesion property of a mussel-inspired polymer. PNIPAAm is syntheiszed via RAFT polymerization, followed by the conjugation of catechol. a mussel-derived adhesive moelcules, to one chain end of the PNIPAAm. The catechol-conjugated PNIPAAm is successfully grafted to the surface of nanopores by polymer solution infiltration through a membrane. The temperture controlled wettability regulates the diffusivity of macromolecules, dextran, through nano sized pores.
Keywords: PNIPAAm, catechol, wettability, diffusion [나노] 1P-7
Photocatalytic performance of TiO2/CNT-graphene nanocomposites under UV and visible light 정고운·김형일†
충남대학교 ([email protected]†)
Poly(vinyl alcohol) (PVA)/TiO2/multi-walled carbon nanotube (MWCNT)-graphene were prepared in order to examine the photocatalytic activities. TiO2 nanoparticles were located uniformly on the surface of MWCNT- graphene. Anatase TiO2 is used as photocatalyst for the degradation of various environmental pollutants.
MWCNTs were used to prevent the restacking of graphene sheets and graphene was used to improve the adsorption of pollutant. The morphology was investigated by scanning electron microscope. The photocatalytic activity was evaluated by UV spectrometer based on the degradation of various model dyes under visible and UV light. The enhanced photocatalytic performance is attributed to the well dispersion of TiO2 and the effective adsorption of pollutants by graphene.
Keywords: PVA, graphene, carbon nanotube, photocatlyst, nanocomposite [무기재료] 1P-20
Photocatalytic Reduction of Methylene Blue using Infrared-Active Heterosturucture Nanocrystals 박채원·이도창†
한국과학기술원 ([email protected]†)
We synthesized PbSe/CdSe/CdS core/shell/shell nanocrystals with type II band offset and varied their morphology including sphere, pyramid, and tetrapod structure. In addition, we obtained metal-semiconductor nanohybrid by subsequently growing gold nanoparticles at the corners of the structure to promote photocatalytic
performance for reduction of methylene blue. We observed that the morphology change leads to significant difference in photocatalytic efficiency. Tetrapods show the highest photocatalytic performance over that of pyramids and sphere. Since our heterostructures are based on PbSe core, we aimed to stretch photocatalysis out to infrared. We demonstrate that Au-tipped PbSe/CdSe/CdS nanocrystals exhibit exceptional photocatalytic activity in the visible and near infrared region out to 785 nm. Au-tipped tetrapod nanocrystals exhibited extra- ordinary photocatalytic activity even under 785 nm light with 70% methylene blue reduction for 4 h.
Keywords: quantum dots, photocatalysis, PbSe, shape control, heteronanostructures [무기재료] 1P-24
Enhanced electrochemical characteristics of activated carbon fiber–based electrodes modified by hydrofluoric acid chemical treatment
유혜련·정민정·이영석†
충남대학교 ([email protected]†)
The activated carbon fiber (ACF) was prepared and chemical treated using hydrofluoric acid to enhance the electrochemical characteristics for electrode. The carbon fibers were fabricated with polyacrylonitrile-pitch mixture by electospinning and then treated under high temperature. These carbon fibers were activated by chemical activation process using KOH. The chemical treatment of activated carbon fibers was carried out at various concentration of HF solution. The untreated or treated ACF-based electrode was used as the working electrode, Ag/AgCl was used as the reference electrode, and platinum plate was also used as the counter electrode. Cyclic voltammetry (CV) of the electrode materials was performed in a potential range of 0–1 V at differing scan rates of 5 and 50 mV/s.
Keywords: activated carbon fiber, hydrofluoric acid, electrode, cyclic voltammetry [생물공학] 2P-7
Study of physicochemical properties and biological functions of bisphosphonate-incorporated calcium phosphate hybrid films
성기범·김주승·이찬희·이우걸†
단국대학교 ([email protected]†)
Calcium phosphate films are highly biocompatible and osteoconductive, which can be used as bone substitutes. In this investigation, drug such as bisphosphonate was incorporated in calcium phosphate hybrid films to increase therapeutic effects. Physicochemical properties of the calcium phosphate hybrid films were analyzed using FE-SEM, AFM and XPS. Also, the effect of calcium phosphate hybrid films on protein adsorption, bovine serum albumin (BSA), hen egg white lysozyme (LZM) and fibrinogen (FBN) was analyzed using optical waveguide lightmode specptroscope (OWLS). Biological responses of osteoblask-like MG63 cells to calcium phosphate films also examined.
Keywords: Bisphosphonate, calcium phosphate film
[에너지저장변환] 2P-14
2,1,3-Benzothiadiazole- , thieno[3,2-b]thiophene- and thiazolo[5,4-d]thiazole- Based Conducting polymers Designed for Photovoltaic cells
윤대희·유한솔·박용성†·우제완·원호연*
상명대학교, *웅진폴리실리콘 중앙연구소 ([email protected]†)
In this study, donor-acceptor (D/A) polymers based on benzothiadiazole, thieno[3,2-b]thiophene and thiazolo [5,4-d]thiazole were synthesized by Stille coupling reaction. Using a spacer as thiophene and benzothiadiazole to increase the solubility of the polymers were substituted alkoxy group, in order to improve molecular weight, the polymer were polymerized. The basic properties of the synthesized polymers were measured by 1H-NMR, 13C-NMR, UV-Vis and GPC, and electrochemical behavior by cyclic voltammetry were analyzed. PSCs device were fabricated to examine the photovoltaic properties by blended polymer/PC71BM.
Keywords: D/A polymer, photovoltaics, stille coupling reaction, benzothiadiazole derivatives, thieno[3,2-b]- thiophene derivatives, thiazolo[5,4-d]thiazole derivatives
[에너지저장변환] 2P-18
박테리아 템플릿을 이용한 주석 기반 다상의 나노복합체 합성 및 리튬이온 이차전지 음극 특성 연구 심현우·김동완†
아주대학교 ([email protected]†)
최근 리튬과의 합금/탈합금 반응으로 높은 이론용량을 나타내는 주석 산화물 (SnOx) 혹은 주석 금속 (Metallic Sn)과 같은 재료들의 연구 개발이 활발히 진행되고 있다. 본 연구에서는 비정질 카본과 주석 기반 다상의 나노구조체들로 이 루어진 튜브 형상의 나노복합체를 제조하고, 합성된 분말의 리튬이온 이차전지 음극 특성을 평가하였다. 특히, 합성된 나노복합체는 막대 형상을 갖는 Bacillus subtilis 박테리아를 템플릿으로 매개하여, 박테리아/주석 산화물로 이루어진 1차적인 분말을 획득하고, 이후 400 ℃의 수소 분위기 하에서 열화학적 환원 공정을 통해 템플릿이 제거되면서 hollow 구조를 갖는, 비정질 카본 및 주석 산화물 (SnOx, 1≤x≤2)/주석 금속으로 이루어진 나노복합체를 제조할 수 있다. 합 성된 나노복합체는 템플릿이 제거된 후에도 막대 형상을 유지하였으며, 리튬이온 이차전지 음극 평가에서도 78 mA g-1의 전류밀도에서 620 mAh g-1의 우수한 용량 특성을 나타냈다.
Keywords: 주석, 나노복합체, 박테리아, 열화학적 환원, 리튬이온 이차전지 [전기화학] 2P-24
니켈기판의 황화처리 시간에 따른 황화니켈 전극의 전기화학특성 조인호·류호석†
경상대학교 나노신소재공학부 ([email protected]†)
기존의 황화니켈 전극의 경우 활물질, 도전재와 바인더를 혼합하여 전극을 제조하기 때문에 전극 두께가 두꺼워 질 수록 낮은 이온전도도 및 전기 전도도로 인하여 용량 감소와 사이클 특성의 감소를 가진다. 그러나 3차원 구조의 전극 은 바인더를 필요로 하지 않으며, 전기 전도도와, 이온전도도가 개선되어 고율특성과 사이클 성능을 향상시킬 수 있는 장점을 가지고 있다. 이에 본 연구에서는 니켈 기판의 황화처리를 통하여 3차원 황화니켈 전극을 제조하였으며, 활물
질의 양의 변화에 따른 특성을 보기 위하여 황화처리 시간을 변화시켰다. 그에 따른 전극의 형상과 전기화학특성을 평 가하였다.
Keywords: 니켈, 소듐, Sulfur, 전지 [전기화학] 2P-31
Synthesis and electrochemical properties of doped nano-sized spinel Li4Ti5O12 as anode material in lithium ion batteries
김경옥·류광선† 울산대학교 화학과 ([email protected]†)
Li4Ti5O12, also reported as Li1.333Ti1.667O4, is a promising anode material for rechargeable lithium ion batteries.
It has good advantages such as good structural stability with almost negligible volume change in the charge/
discharge process, which may enable Li4Ti5O12 electrode to have excellent Li+ insertion and extraction reversibility. However, as an insulator, it has extremely low rate capacity resulting from poor electronic conduc- tivity has hindered the practical use of Li4Ti5O12. To improve the conductivities, nano-sized doped Li4Ti5O12 in Li, Ti or O sites was by sol-gel method according to amount of doping material. To confirm formation of structure, we measured physical properties as XRD, ICP, SEM and electrochemical characteristics were performed by charge-discharge, cycle performance, rate capability and cyclic voltammetry in the range of 1.0-2.6 V.
Keywords: Li4Ti5O12, anode, lithium ion battery [접착제 · 도료 · 잉크, 콜로이드 · 계면화학] 1P-27
유-무기 하이브리드 입자 제조 및 자동차용 헤드라이트 코팅제 개발 오창섭·박건희*·최기현*·지수정*·박승규*,†
KISTI reseat program, *호서대학교 ([email protected]†)
최근 유-무기 하이브리드 나노소재를 이용한 클리어 코팅 개발 방법이 연구가 진행되고 있다. 일반적으로 Nano silica ball 파우더를 합성하고 고분자 물질을 합성시 일부가 뭉쳐 수율이 낮아지게 된다. 본 연구에서는 분산안정제 (Poly vinyl alchol)을 이용하여 실리카볼을 분산시켜 y-methacryloxypropyltrimethoxy silane (y-MPS), methyl methacrylate, stylene, 그리고 acrylonitrile을 이용하여 제조했을 때 향상된 효율을 얻었다. 이를 클리어코트에 일정 비율로 혼합한 후 자동차 헤드라이트커버에 코팅하여 Anti-scratch 및 Transimissivity를 조사하였고 SEM, FT-IR, TGA, UV, Scratch resistance test를 이용하여 characterization을 실시하였다.
Keywords: 유-무기 하이브리드 나노소재, nano silicaball,γ-MPS, scratch resistance test [정밀화학] 1P-30
Efficient catalytic process for acetaminophen
김중원·서영란·채다원·김영규†
서울대학교 ([email protected]†)
Acetaminophen, as an analgesic drug, has taken one of the largest shares in the world pharmaceutical market
and its main physiological effects are pain-relieving and alleviating a fever on cold and flu symptoms. Due to its extensive medicinal applications, the efficient synthesis of acetaminophen has been of interest not only for development of novel synthetic methods but also for practical applications. In this presentation, we are going to discuss our effort to develop both an efficient and an economic synthetic process for acetaminophen using catalyzed reactions. We could make the synthetic process more eco-friendly under mild reaction conditions and the synthetic steps shorter without the additional purification process.
Keywords: catalyzed reacttion, eco-friendly [정보전자소재] 2P-32
Solid state fluorescence enhancement of a oxadiazole molecules for immunofluorescence labelling 배은혜·김형준†
공주대학교 ([email protected]†)
Immunoflourescence labeling for a biosenser is a widely used technique in the biological research. Generally, organic fluorescent dyes or fluorescent quantum dots are chosen as a signaling agent due to their high fluorescence quantum efficiency. However, organic fluorescent molecules show aggregation by π-π* stacking in solid state leading reduced fluorescence efficiency. As a result, quantum dots are introduced to surpass this efficiency issue, but they tend to kill the cells because of their high toxicity. These problems of the conventional fluorescent markers are to overcome by designing new organic fluorescent molecules and disperse in a nano-structure for further bio-related applications.
Keywords: Immunoflourescence labeling, oxadiazole, organic fluorescent [촉매] 2P-42
공중합체를 이용한 메조 다공성 캡슐 합성에 대한 연구
김계령·이주현·전훈기·박다민·김건중†
인하대학교 ([email protected]†)
최근 실리카에 의한 메조 다공성 재료에 관한 문헌과 공중합체 주형을 이용한 나노입자 또는 자기조립 등에 관련한 연구가 많이 발표되고 있다. 종전 기술 중에도 주형을 이용한 다공성 물질들의 합성에 관한 것들이 있었지만, 주형으로 사용되는 실리카 중심에 균일한 크기의 금속 입자는 없었다. 때문에, 중공형 내부에 균일한 크기의 금속입자가 들어 있 는 메조 다공성 외곽을 갖는 구형 메조 다공성 캡슐 및 세라믹 나노 캡슐의 제조는 불가능했었다. 본 연구는 균일한 크기의 금속(Ni, Fe등)을 주형에 넣은 메조 다공성 캡슐을 합성하여 세공이 없는 금속 파우더 형태보다 높은 촉매활성 을 얻었다. FE-SEM, TEM, XRD, BET 등을 이용하여 촉매의 물리적 특성과 화학적 특성을 분석하였다.
Keywords: 공중합체, 메조 다공성 캡슐, 실리카, 촉매 [촉매] 2P-43
SO2 촉매환원을 위한 Cu-Sn-Al 촉매의 최적화
최희영·박노국·이태진†·백점인*·이중범*·류청걸*
영남대학교, *한국전력연구원 ([email protected]†)
고온건식탈황공정은 탈황공정, 재생공정, 직접황회수공정(DSRP)의 세 가지 단위 공정을 포함한다. 고압의 SO2는 재 생공정에서 직접 황 회수공정으로 공급된다. 고온건식탈황공정은 석탄가스화로부터 얻어진 연료가스를 정제하기 위한 공정으로 여기에서 흡수, 제거된 황을 후처리하는 기술이다. 직접 황 회수 공정은 탈황제를 재생하는 과정에서 발생되 는 SO2를 원소 황으로 직접 전환하기 위한 기술이다. 본 연구에선 공침법으로 Cu-Sn-Al 촉매를 제조하였다. 공침법 으로 촉매활성물질을 얻은 후, 이를 110 ℃에서 12 h 동안 건조하고 600 ℃에서 4 h 동안 소성하여 분말상태로 촉매 를 제조하였다. 제조된 촉매의 활성 실험은 200~450 ℃에서 수행되었고, 환원제로 CO가 사용되었다. 촉매의 표면적 은 전구체 용액의 농도를 제어함에 따라 변하였다. 실험결과, 촉매의 활성은 표면적에 상당히 의존되는 것으로 확인되 었다. 따라서 Cu-Sn-Al 촉매의 제조를 위한 전구체 용액의 농도는 매우 중요하다고 할 수 있다.
Keywords: 석탄가스화, 고온건식 탈황, 이산화황, 직접 황 회수, 촉매환원 [펄프제지피혁] 1P-39
계면활성제 투입에 따른 TMP의 과산화수소 표백효율 연구
서진호·김형진†·이태주·황지현
국민대학교 ([email protected]†)
계면활성제는 양쪽성 물질로 친수성과 소수성 구조를 모두 지녀 수계 내에서 극성과 비극성 부분이 동시에 나타나는 특징을 지닌다. 이러한 구조와 열역학적 힘에 의해 수계 내에 존재하는 입자 표면에너지를 최소화해주고 제지공정상에 서는 탈묵공정에 주로 사용되어 잉크의 박리와 분산을 위해 사용되어왔다. 최근 계면활성제 중 ethylene glycol은 오존 표백 시 선택성 개선에 기여한다고 밝혀진 바 있으며 본 연구에서는 이러한 계면활성제의 특성을 이용하여 탈묵공정에 서 사용되던 계면활성제를 TMP의 과산화수소 표백 공정에 적용함으로써 표백 효율 개선과 선택적인 표백에 대해 연 구하고자 하였다.
Keywords: bleaching, TMP, Polyethylene glycol, surfactant, hydrogen peroxide [화학공정] 1P-42
Prediction of biodiesel fuel properties from fatty acid alkyl ester
전길송·박태규·정수경*·이승범·홍인권†
단국대학교 화학공학과, *김포대학교 호텔조리과 ([email protected]†)
Because of limited reserves and high price of oil, that is the most widely used energy sources, interest in its substitute is increasing day by day. Biodiesel that is one of them substitutes has been actively researched.
Biodiesel is a non-polluting fuels made from vegetable oil or animal fats as raw materials. Biodiesel is made by transesterification method by using the alcohol. At this, fatty acid alkyl ester by generated is the most basic molecular structure of biodiesel. Therefore, analysis of the fatty acid alkyl ester can predict the characteristics of the biodiesel. In this study, fatty acid alkyl ester (basic structure of the biodiesel) are measured of physical properties (higher heating value, kinematic viscosity, and specific gravity). And that can predict the fuel properties of biodiesel by using vegetable oil as the primary data is to use. Furthermore, it aims to be applied to predict the performance of biodiesel based on animal fats.
Keywords: fatty acid alkyl ester, biodiesel, HHV, kinematic viscosity, specific gravity
[환경에너지] 1P-49
Biodiesel production from waste oil using Candida antarctica lipase
박재선·최명수·김도형·이재동†
가천대학교 환경에너지공학과 ([email protected]†)
Methanol is generally used as an acyl acceptor for the biological production of biodiesel. However, its strong inhibition effect on lipase activity decreases the productivity and increases the cost of enzyme supplementation.
In this study, we improved the lipase activity, by stepwise addition of methanol to prevent the deactivation of lipase. The transesterification of the waste oil with methanol was investigated in the prescence of an immobilized enzyme from Candida antartica.
Keywords: biodiesel, transesterification, immobilized lipase, waste oil, FAME content [환경에너지] 1P-54
PEMFC 전극용 촉매 지지체의 표면 처리를 통한 촉매의 성능 및 내구성 향상에 관한 연구 홍석용*,**·이영석**·김희연*,†
*한국에너지기술연구원, **충남대학교 ([email protected]†)
연료전지용 전극용 촉매는 반응의 진행에 따른 촉매의 부식이나 탈락 등으로 인하여 쉽게 비활성화되는 단점이 있 다. 이때, 촉매 지지체로서 사용되는 카본블랙의 표면상태는 금속 입자의 분산도, 내구성 등에 상당한 영향을 미친다.
본 연구는 카본블랙의 표면 처리 과정을 통하여 표면에 결함을 만들고 산소-관능기 그룹을 도입하여 지지체의 표면과 금속 입자간의 상호작용을 강화시킴으로써, 촉매 입자들의 분산도를 향상시키고 응집현상을 방지함으로써, 궁극적으로 는 촉매의 내구성을 향상시키는 것을 목적으로 한다. 촉매의 표면처리를 위하여 황산(H2SO4, 98%)과 질산(HNO3, 14M)의 혼합 용액을 사용하였으며, 오존처리, N-doping 등의 기술을 사용하고, 촉매의 내구성에 미치는 영향을 비교 하였다. 반응 전 후의 촉매는 TEM (Transmission Electron Microscope) 및 SEM (Scanning Electron Microscope)을 사용하여 관찰하였고, XPS (X-ray Photoelectron Spectrometer)를 이용하여 카본블랙 표면에 도입된 산소 관능기의 농도를 분석하고, 금속 촉매와 탄소지지체 사이의 상호작용을 분석하였다.
Keywords: 연료전지, 표면처리, 내구성, 비활성화 [환경에너지] 2P-51
Synthesis of Cu(InGa)Se2 nanoparticles in oleic acid for low-cost and thin film solar cells
한재섭·이수호*·이재형*·심중표†
군산대학교,*성균관대학교 ([email protected]†)
CuIn1-xGaxSe2 (CIGS) compound has been admitted to be the most promising absorber material for thin film solar cell applications. Recently, the conversion efficiency for CIGS-based solar cell laboratory devices has reached 19.9%. However the vacuum processes have demerits such as high production cost and difficulty in scaling up. Therefore, the study for non-vacuum process that enable low-cost fabrication through solution- base process, has attracted much attention. In this study, CIGS nanoparticles are synthesized by solution-base process without any vacuum devices and hot-injection process. In the case where copper, Indium and gallium
compounds, and selenium powder are dissolved in organic solvents, separatively. To form CIGS nanoparticles, Se solution is injected into metal solution keeping temperature of the solution above 200oC. The physical properties and formation mechanisms of CIGS nanoparticles are investigated for reaction temperature and reaction time.
Keywords: CIGS thin film solar cell [환경에너지] 2P-53
Synthesis of 5-hydroxymethyl-2-furfural from glucose with basic/acidic ion-exchange resins in organic solvents
김보라*,**·정재원*·CHURCHIL ANGEL ANTONY RAJJEGANATHAN*·이관영**·조진구*,†
*한국생산기술연구원, **고려대학교 ([email protected]†)
석유의 한정된 매장량과 개발도상국의 수요 급증은 고유가 시대를 초래하고 있으며, 더욱이 석유로부터 인해 발생하 는 비가역적 온실가스는 지구온난화 문제를 일으키고 있다. 이에 세계 각국은 재생 및 지속사용이 가능한 바이오매스 를 통해 석유자원을 대체하기 위한 많은 노력을 기울이고 있으며, 이와 같은 노력의 일환으로, 최근 각광받고 있는 대 표적인 바이오매스 유래 플랫폼 화합물로서 퓨란계 화합물인 5-hydroxymethyl-2-furfural (HMF)과 그 알킬 에테르 유도체인 5-alkoxymethyl-2-furfural (AMF)이 있다. 본 연구에서는 염기성-산성을 갖는 음이온/양이온교환수지를 이용하여 글루코오스로부터 프룩토오스를 얻는 이성질체화 반응과 프룩토오스로부터 퓨란계 화합물을 얻는 탈수화 반 응을 동시에 또는 연속적으로 수행하였으며, 저비등점 유기용매를 사용하여 분리정제가 용이한 방법으로 글루코오스 로부터 HMF 또는 AMF를 효율적으로 제조하는 연구를 진행하였다.
Keywords: 재생 및 지속가능, 바이오매스, 글루코오스, 퓨란계 화합물, 이온 교환수지
