Korean Chemical Engineering Research

전체 글

(1)Korean Chem. Eng. Res., Vol. 43, No. 1, February, 2005, pp. 140-145. GC/microreactorÇ ¿ô§ ×|s {Ã CuO-Fe2O3 ¬?C£ ´|ð. ¿óì ô <? ¿Lû. †. £¬HG dHàHê ¬MQ Î g } 220 ¸ ö ³ [¤, 2004¸ 11ö 2³ >). 305-764 (2004 6 14. Desulfurization Ability of CuO-Fe2O3 Sorbents with Respect to the Calcination Temperature by GC/microreactor Hyo-Song Lee, Jin-Yong Kim, Jeong-Soo Kim and Young Woo Rhee† Department of Chemical Engineering, Chungnam National University, 220, Gung-dong, Yuseong-gu, Daejeon 305-764, Korea (Received 14 June 2004; accepted 2 November 2004). ß È. á õgÑ2 ? äí0³ CuOõ ÄGÊ, Fe O W

(2) s 7.5 wt%, 15 wt%, 22.5 wt%³ ¡dQÿÊ, ((Z W

(3) s 25 wt%³ Ê_Gñ ¤fõ fÆG. 7¾ 5 ¡dÑ ñ ¤f %z D ¡dõ Æ G, .Gñ, ¤f 5õ 700, 900 -Ê 1,100 C³ -Gñ ¤fõ fÆG. fÆê ¤f2 GC/ä,õ «ÄGñ «Ç Y×s Gk, «) ¤f zd52 500 C, é@52 700 C³ G. ä Má XRD ~s Gñ dYí =õ e¯Gk, BET ~s Gñ 5 ¡dÑ ñ ¤f ,

(4) J ¡dõ Æ G. K, ß, «ÇÑ 700 CÑ ê CFS3 ¤f(CuO : Fe O : SiO = 52.5 wt% : 22.5 wt% : 25 wt%) H O K/åÑ ñ %z D ¡dõ e¯G. ê 5Ñ ñ 9,

(5) J ¡d2 ¿j ÷÷( :I. K, ß, «ÇÑ H OÑ K %z D IGõ e¯O ¤ ÀÉ. 7¾ 1,100 CÑ ê CFS1 ¤f(CuO:Fe O : SiO =67.5 wt% : 7.5 wt% : 25 wt%) ÎÑ2 H OÍ ÊéWÑ gGÊ, 100 «Ç« (û áÑ ¤f 100 g¢ 10 g zs fMO ¤ À2 %z Ds Ý. 2. 3. SiO2. o. o. o. o. 2. 3. 2. 2. 2. o. 2. 3. 2. 2. Abstract − The desulfurization abilities using GC/microreactor have been examined for CuO-Fe2O3 sorbents with respect to calcination temperatures of 700, 900 and 1,100 oC. CuO was used as a main active component, Fe2O3 was used as an additive one and 25 wt% SiO2 was used as a support. The desulfurization reaction temperature was 500 oC and the regeneration reaction temperature was 700 oC. From the XRD results, the CuFeO2 compound has been observed for the fresh sorbent calcined at 1,100 oC and the CuFeS2 compound for the reacted sorbent calcined at 1,100 oC. By the BET results, however any significant differences among sorbents calcined at the three different temperatures of 700, 900 and 1,100 oC haven’t been observed. Especially CFS1 (CuO : Fe2O3 : SiO2=67.5 wt% : 7.5 wt% : 25 wt%) sorbent calcined at 1,100 oC maintained about 10 g sulfur/100 g sorbent for 100 cycles by the cyclic test. Key words: Desulfurization Abillities, CuO-Fe2O3 Sorbent, CuFeO2 Compound, Calcination Effect. 1.. C «. õgÍ Q« «P´(Ê À[1-6]. WestmorelandQ Harrison[7]o ªJk³ 28Í( òõ «Ä g %z×s GÊ KÄK 10Í( òË« 400 C-1,200 C 5p.Ñ ¤fÑ JYG2 s èG. Ayala Ù[8] o 350 C-550 C yI5 ò 5p.Ñ ñ6 Í( dís «ÄGñ H ÍA(U-gas, Texaco-gas) ùòHJ H S Ñ îGñ Æ Gk, ê CuOÑ ¬K H S . Í Íß o ak³ ÷

(6) . 6÷ CuOÍ g-³ h òæ2 éfYs ÷Ék, zd/é@« äÞæ2 ßD «Ç Ñ %z D Y,J¯ IGõ Í12 ®¯« î ¤ À.. !ÍAd ÞYèM« DÊ èMöÑ WGñ

(7) Ï o Á Sê h ndJ¯ ßYs ä2 èMök³ Qo õgÍ ¤} æÊ Àk, U¾ ãK z s (r @ ÍA³z ßjõ Ý DGD .K %zà_o !ÍAd ÞYèM àJ¯ íès .g2 1¤J«. %zà_Ñ Äæ2 ¤f2 U¾ dí ÆYÑ Gñ fÆê é@ ÍDK ¤f³ Ñ ¬K. o. o. o. o. 2. 2. † To. whom correspondence should be addressed. E-mail: [email protected] 140.

(8) 5YÑ ñ CuO-Fe O Z¤f z , 2. Ù[9]o ¨¤ CuO(uÄ)Q CuOQ SiO í-J¯ HYí, Ñ ((ê CuO, SiO Ñ ~ ê CuOQ zeoliteÑ ((ê ¤ fõ fÆGñ WGG. ê, ¨K í-J¯ HYk³ f Æê ¤fQ ÞÛK örk³ fÆê ¤f %z DÑ º ó«Í ÇÉ. Patrickê Gavalas[10]2 CuOQ Al O ³ «P´ , ¤fÑ ¬K zdí ~g5õ <4ÝD .Gñ é@ ×s G. ê 650 C «GÑ2 zdí« ~gæ( : Ik, 700 CÑ2 g- ~ u 8%Í

(9) « zdís G (O Ñ ~gæ, 800 C « Ñ2 zdí « ³´÷( :I. Yi Ù[11]o SiO , r-alumina, zeoliteõ g-ª ¤f ( (³ ÄGñ ¤fõ fÆK á ¤fË %z Ds Æ. Gk, SiO õ ((³ ÄK ÎÑ Íß o %z Ds ÷ É. Song Ù[12]o g-ª ¤fÑ ¬Gñ (( SiO M J W

(10) s Æ Gk, SiO W

(11) « 25 wt% « ³ ÎÑ ß D «ÇÑ gÆJ¯ 8_ s K(O ¤ ÀÉ[12]. MÑ2 zinc ferriteQ zinc titanate ç« ¤ ppmvb( H S õ ¤ Àk d ~.DÑ j é@æ2 ¤fÑ ¬Gñ Qo õg Í «P´(Ê Àk÷, «Ë ¤fË ßD «Ç ×Ñ õ J¯ zd Ú é@à_k³ ¯K ¤f ä K ÝQ ôD IGõ Ý[13]. K, d{ Dís «ÄK

(12) Ï à£ ¤f fÆÑ ¬K õg «P´(Ê À[14]. á õgÑ2 (( SiO W

(13) s 25 wt%³ Ê_GÊ Í f³ ÄK Fe O W

(14) s ¡dE ¤fõ fÆG. Ê fÆÑ ¤f 5õ 700, 900 -Ê 1,100 C³ -Gñ 5 ¡dÑ !ñ ¤f %z D ¡dõ Æ. GÊÉ G. «õ .Gñ GC/äDõ «ÄK «Ç × s Gk, ä Má ¤f dYí =õ XRD ~s Gñ e¯G. K, ¤f BET ~s Gñ 5 ¡dÑ !ñ ¤f W,

(15) Js Æ G. K, H OÍ CFS ¤fÑ Âj2 s <4ÝD .Gñ, 700 CÑ ê CFS3 ¤f(CuO : Fe O : SiO =52.5 wt% : 22.5 wt% : 25 wt%) H O K/å Ñ !ñ ßD «ÇÑ %z Ds Æ G. K(Lk³ Í ß Î¤K %z Ds Ý¯ 1,100 CÑ ê CFS1 ¤f (CuO : Fe O : SiO =67.5 wt% : 7.5 wt% : 25 wt%) 100 cycle ×s Gñ %z Ds ½GÊÉ G. Kyotani SiO2. 2. 2. 2 3. o. o. o. 2. 2. 2. 2. 2. 2. 2. 3. o. 2. o. 2 3. 2. 2. o. 2. 3. 2. 2.. 141. 3. -Ê 22.5 wt%³ ¡dZk, fÆê ¤fËo CFS1, -Ê CFS3³ æÉ. Table 1Ñ fÆê ¤f Æ s ÷É. ¤f2 fÆörÑ K %z DÑ Ã ó«Í ÷ ( :22 Ys ÊsGñ[9], fÆÑ Ä«K í-J¯ HYrs «ÄGñ fÆG. ¤fõ fÆGD .Gñ Îo òG2 W

(16) 0Ës Ñ o áÑ 0 ¿Dõ è³Gj GD .Gñ åÊs «ÄGñ 6Ñ 8 HYG. åÊs -Ê û 0Ñ EG(ethylene glycol)s ÍGñ äds Gk, äd« ê 0 õ Dõ «ÄGñ Wg=³ K á, 200 CÑ 4Ñ 8 QÆ|. QÆÍ ³û 02 î ³õ «ÄGñ G k, ¤f 5 ¡dÑ !ñ %z D ¡dõ Æ G D .Gñ, 5õ 700, 900, 1,100 C³ ¡dE ¤fõ fÆG. s Kn 02 ~GQ ~s Mn áÑ 90 µm106 µm ¿D ¤fõ »É. 2-2. /# SI ¤f ÎÑ2 ßDJk³ ¤fÍ %z Ds ³_Gj K(O ¤ À2(Í kÎ y®G, «õ Æ GD .Gñ GC/ äDõ «ÄK ¤f ßD «Ç %z D ×s G. Fig. 1Ñ2 á ×Ñ Äê ×ßj í÷õ ÷É. ×Ä ÍA2 MFCs(mass flow controllers)Ñ Gñ K

(17) « ÆQæ ´ HYÆ³ K½æ, ³_ Ñ 8 HY« «P´, á GC³ K½ê. GC(Young-In Inc., Korea)2 TCDÍ ßôê as ÄG k, äD2 « 2.54 cm« k³ OË´. ä D 5õ +_GD .Gñ ùM¬õ äD zÑ .jG ´ Gk, à³ zÑ ñ ùM¬õ ßôGñ ä5 õ ÆQG. K, syringe BéÑ Gñ äD³ c½æ2 í Ddõ .Gñ Íù º«éõ 45 cm « £~¾ Lj ÝÊ 5 ÆQDõ Gñ 100 C « k³ 5õ K(O ¤ À´ G . K, äDÑ ÷12 ÍAË« GC³ Ë´ÍD MÑ - Dõ «ÄK í Tè(water trap)s êG´ Gñ ßjõ ÝDG ÊÉ G. GC/äD ×Ñ Äê ÍA Æ o Table 2Ñ ÷ É. f !ÍAdõ Gñ @ æ2 ÍA yÑ H S 2 u 2,800 ppm «(O, á GC/äD ×Ñ2 1%(10,000 ppm) 15 wt% CFS2. o. o. o. 2. / . 2-1. ´g£ g» ¤f Æ o DÊ ×s Gñ CuOª ¤f Î ( ( SiO W

(18) « 25 wt% « ¯ ÎÑ ßD «ÇÑ gÆJ ¯ 8_ s K(G2 ak³ ÷

(19) k³, (( SiO W

(20) s 25 wt%³ G. SiO W

(21) « s ÎÑ2 ßD «ÇÑ % z D IGÍ uíj ,}æ, SiO W

(22) « o ÎÑ2 o %z Ds Ý«j ê[12]. Íf Fe O W

(23) o 7.5 wt%, 2. 2. 2. 2. 2. 3. Table 1. Composition of sorbents (wt%) Sorbents CFS1 CFS2 CFS3. CuO 67.5 60 52.5. Fe2O3 7.5 15 22.5. SiO2 25. Fig. 1. Schematic diagram of experimental apparatus. 1. N2 9. Heating tape 2. H2S 10. Sample 3. SO2 11. Micro-reactor 4. Mixing gas 12. Water trap 5. Air 13. GC 6. MFC 14. PC 7. Mixing tank 15. Vent 8. Syringe pump Korean Chem. Eng. Res., Vol. 43, No. 1, February, 2005.

(24) «Áö6,Äö6_¤ö«Î. 142. Table 2. Composition of simulated gas H2 CO CO2 H2S H2O N2. Sulfidation 11.82% 19.18% 7.0% 1.0% 10.8% Balance. Regeneration O2. 5%. N2. Balance. H Sõ ÄGñ ×Ñ ®æ2 Ñs k«ÊÉ G. GC/ äDõ «ÄK ßD «Ç ×s .g u 3 g ¤f õ ÄG. -Ê ×o zdQ é@×s äÞJk³ G k, zd52 500 C -Ê é@52 700 C³ Gñ ×s G. zd2 H S g Í 50 ppm ³ Aõ ²ê Ñk³ Gk, Ab( ¤ê z s ªK á 100 g ¤fÑ ¬K k³ hGñ ¤f %z Ds ªG. é@o ¤f é@Ñ £~G´ Ñs &´ dÍAQ [ ñs Z. ¤f 5õ 1,100 C³ Gs Î, CFS ¤fÑ @ æ2 CuFeO ¶2 *³Ò = dYí« ßD «ÇÑ ¤f %z DÑ ´¥ s Âj2( <4ÝÊÉ G. K, 5 ¡dÑ !ñ ¤f U ¡dõ Æ GD .Gñ, BET Ú ä Má XRD ~s G. 2. o. o. 2. Fig. 2. Sulfur loadings of CFS1 sorbent in cyclic test (with H2O).. o. 2. 3.. ûG Z +{. ¬?g£ ð{ /# á ×Ñ ¤}ê DÊ TGA ×ê zdä M XRD ~s Gñ 1,100 CÑ ê ¤fË« 700 C Ú 900 C Ñ ê ¤fËê2[15] - CuFeO ¶2 *³Ò dYí =õ äÊ À2 as e¯G. U¾ ¤f ÎÑ2 ñ6. «Ç« ,}ê áÑ o %z Ds K(G2 a« kÎ y® G[15, 16]. CFS ¤fË 5Ñ !ñ ßD «ÇÑ %z Ds Æ GD .Gñ GC/äDõ «ÄK ßD «Ç ×s G. ßD «Ç ×o 700 CÑ ê ¤fQ 1,100 CÑ ê ¤fÑ ¬Gñ G. q7G

(25) , 700 C Ñ ê ¤fQ 900 CÑ ê ¤f ÎÑ2 ä M XRD ~êÑ ³K =õ ÝD AéÑ ¬,Jk³ 700 CÑ ê ¤fÑ ¬gO ßD «Ç ×s K á, êõ 1,100 CÑ ê ¤f ßD «Ç ×êQ WG GÊÉ G. ßD «Ç ×ê WGõ Gñ 1,100 CÑ ê CFS ¤fÑ @ ê CuFeO Í ßD «ÇÑ %z DÑ Âj2 s Æ GÊÉ G. %z Do ¤f 100 g ¢ fMê z g ¤(sulfur loading)³ _G. Fig. 2Ñ2 700 CÑ ê CFS1 ¤fQ 1,100 CÑ ê CFS1 ¤f ßD «Ç ×êõ ÷É. Fig. 2Ñ ÷û àQ ç« ¤fËo «Ç« ÍO¤´ %z D« æ, ³_K «Ç« (û áÑ2 %z D« üg¾ K(æ 2 HSs Ý¯. U¾ 1,100 CÑ ê CFS1 ¤f ÎÑ2 uíj ³_K %z DÑ G, 700 CÑ ê CFS1 ¤fÑ WGñ kÎ o %z Ds Ý¯. K, 3-1. CFS. o. o. o. 2. o. o. o. o. o. o. o. 2. o. o. o. o. ¤@¤ C43× C1 2005 2. Fig. 3. Sulfur loadings of CFS2 sorbent in cyclic test (with H2O).. Ñ ê CFS1 ¤f MÊ %z Do u 12.8³ ÷

(26) . Fig. 3Ñ2 700 CÑ ê CFS2 ¤fQ 1,100 CÑ ê CFS2 ¤f ßD «Ç ×êõ ÷É. Fig. 3Ñ ÷û àQ ç« CFS2 ¤f 1,100 CÑ ê CFS2 ¤fÍ 700 CÑ ê CFS2 ¤fÑ WGñ o %z D s Ý. 6÷ 1,100 CÑ ê CFS1 ¤fÑ WGñ M Jk³ o %z Ds Ýk, %z D IG }- ³ ´

(27) . Fig. 4Ñ2 700 CÑ ê CFS3 ¤fQ 1,100 CÑ ê CFS3 ¤f ßD «Ç ×êõ ÷É. Fig. 4Ñ ÷ û àQ ç« CFS3 ¤f ñ ¤fQ K÷Í(³ 1,100 C Ñ ê CFS3 ¤fÍ 700 CÑ ê CFS3 ¤fÑ W Gñ o %z Ds Ý. 6÷ 1,100 CÑ ê CFS3 ¤f %z D IGõ Ý«2 as < ¤ À. . Fig. 2Q Fig. 3 -Ê Fig. 4Ñ ÷û àQ ç«, 1,100 C Ñ ê CFS ¤fË« 700 CÑ ê CFS ¤fËÑ WGñ o %z Ds Ý« ßD «ÇÑ Ý KÄGj. Äî ¤ À2 as e¯O ¤ À. 6÷ 1,100 CÑ ê 1,100 oC. o. o. o. o. o. o. o. o. o. o. o. o. o.

(28) 5YÑ ñ CuO-Fe O Z¤f z , 2. 143. 3. Fig. 4. Sulfur loadings of CFS3 sorbent in cyclic test (with H2O). Fig. 6. Sulfur loadings of sorbents in cyclic test (with H2O). Table 3. BET result of the CFS sorbents (m2/g) Sorbent 700 oC 900 oC 1,100 oC. CFS1 3.2379 0.8159 1.2568. CFS2 3.5079 1.0796 0.5393. CFS3 3.7315 1.2147 0.8546. Ý }- ³_K %z DÑ G

(29) o %z Ds Ý¯. CMS6 ¤f ÎÑ2 o %z Ds G2) Qo « Ç« Hæ³ f !ÍAd AÊÑ JÄG2) KªÍ À . 6÷ 1,100 CÑ ê CFS1 ¤f ÎÑ2 Ý } - o %z DÑ G, K «Ç« ,}öÑ !¶ %z Ds üg¾ K(G2 HSs Ý«³, f !ÍAd AÊÑ JYK ak³ 0ê. 3-2. ? O£ CFS ¬?g£ W÷ ¤L | 5 ¡dÑ !ñ ¤f í-J¯ ¡dQ s <4ÝD .Gñ ¤fË BET ~s Gk, êõ Table 3Ñ ÷É. Table 3Ñ ÷ àQ ç«, W,

(30) Jo 5Í 700 C¯ ÎÑ Íß ¿j ÷

(31) (O Ã ó«Í ÷( :I. «2 5 ¡dÑ !ñ CFS ¤f %z D Ã ó«Í í-J¯ ®¯Ñ K a« 4n¶2 as Ýñc2 a «¶ O ¤ À. 5 ¡dÑ !ñ ¤f dHJ¯ ¡dQ s < 4ÝD .Gñ ¤fË ä Má XRD ~s Gk, Fig. 7Ñ 2 1,100 CÑ ê CFS ¤f ä Má XRD ~êõ ÷É. Fig. 7Ñ ÷û àQ ç«, ä MÑ ÊéG CuFeO = dYí« ä áÑ2 zdí =¯ CuFeS =³ ÊéG2 as e¯O ¤ ÀÉ. «2 1,100 CÑ ê CFS ¤fÍ 700 C÷ 900 CÑ ê ¤fÝ o %z Ds O ¤ À´ G2 ak³ {ê ç« ê. CuO Q FeO2 c³ Cu S Ú FeS = zdís @ G[15], CuFeO 2 CuFeS = zdís K. 6³ ³Gj & í z òõ fMGÊÉ O A, CuFeO = dYís ¯WGÊ À o. Fig. 5. Sulfur loadings of CFS3 sorbent in cyclic test with and without H2O (700 oC calcination).. ¤fQ CFS3 ¤fÍ CFS1 ¤fÑ WGñ

(32) Ï o %z Dê Ý }- %z D IGõ Ý«2 «K2 eG( :k,

(33) Ï Qo õgÍ 1®G. Fig. 5Ñ2 700 CÑ ê CFS ¤fÑ ¬K H O KåÑ !ñ ßD «Ç ×êõ ÷É. ê H O ÊéÑ 2 kÎ o %z Ds Ý(O, H OÍ ÊéG( :2 ÎÑ 2 kÎ o %z Ds ÝñcÉ. «2 H OÍ ÊéG( :2 AÊÑ ¬K CFS ¤f ÄÍD s fGÊ À(O, f !ÍAd AÊÑ ÄæDÑ2 fK« À2 as Ýñc2 a«D G. Fig. 6Ñ2 700 CÑ ê CS3 ¤fQ CMS6 ¤f Ê 1,100 CÑ ê CFS1 ¤f ßD «Ç ×êõ ÷ É. CS3 ¤f(CuO, SiO WK)2 Ífõ WKG( :Ê Àk, CMS6 ¤f(CuO, MoO , MnO , SiO WK)2 DÊ õg Ñ MÊ %z Ds Dgk³ Gs A, Íß o %z Ds ÝñcÉ ¤f«[12]. Fig. 6Ñ ÷û àQ ç« 1,100 CÑ ê CFS1 ¤fÍ CMS6 ¤fÑ WGñ ßD «ÇÑ CFS2. o. 2. 2. 2. 2. o. o. 2. 3. 2. 2. o. o. o. 2. 2. o. o. o. 2. 2. 2. 2. Korean Chem. Eng. Res., Vol. 43, No. 1, February, 2005.

(34) «Áö6,Äö6_¤ö«Î. 144. û «. 4.. õ Íf³ ÄK CFS ¤f 5õ 700, 900, ³ 5õ -Gñ fÆG. ê 5õ 1,100 C³ K ÎÑ, CuFeO ¶2 *³Ò = dYí« æ´ CuFeS = zdís G, ßD «ÇÑ o %z Ds O ¤ À´ G. K, 1,100 CÑ ê ¤ f ÎÑ2 H O ÊéGÑ gGÊ o %z Ds Ý ñcÉ. 6÷ 5 ¡dÑ !ñ ¤f W,

(35) J ¡ d2 ¿j ÷÷( :Ik, %z DÑ Ã s Âj( :2 ak³ ÷

(36) . U¾ 1,100 CÑ ê CFS1 ¤f ÎÑ 2 100 «Ç 8 ¤f 100 gÑ ¬Gñ u 10 g zs fMO ¤ À2 o %z Ds K(G2 ak³ ÷

(37) k, ÆJ¯ J ÄÍD s ÝñcÉ. Fe2O3 1,100 oC o. 2. 2. o. 2. o. [ ÷ á õg2 KhêHé IJDð õg Æ(U_Dð õg Æ: ³hk³ ¤}æÉSn.. R01-2003-000-10224-0). +S Fig. 7. XRD result of CFS1 sorbent calcined at 1,100 oC.. Fig. 8. 100 cycles’ result of CFS1 sorbent calcined at 1,100 oC (with H2O).. 2 ¤fÍ

(38) Ï Jo ¤fõ 1®³ G2 as < ¤ À . , ³K ¤fõ ÄO ÎÑ CuFeO = dY ís ¯WGÊ À2 ¤fÍ

(39) Ï o %z Ds Gj ê. êJk³ 1,100 CÑ ê CFS ¤f ÎÑ2 CuFeO = *³Ò dYís Gk, «2 ä áÑ CuFeS ¶2 zdís Gñ o %z Ds O ¤ Àj æÉ. U¾ 1,100 CÑ ê CFS1 ¤f ÎÑ2 Fig. 8Ñ ÷û à Q ç« 100 «Ç 8 ¤f 100 gÑ ¬Gñ u 10 g zs f MO ¤ À2 o %z Ds K(G2 ak³ ÷

(40) . 2. o. 2. 2. o. ¤@¤ C43× C1 2005 2. 1. Ryu, C. G., Wi, Y. H., Lee, C. B. and Lee, Y. K., “Removal for the Development of High Temperature Sorbent for IGCC(I),” Chemical Industry and Technology, 16(1), 17-26(1998). 2. Moon, S. J. and Ihm, S. K., “Characteristics of Bimetallic Cobalt and Molybdenum Catalysts Supported on Activated Carbon or Alumina in Hydrodesulfurization,” Korean J. Chem. Eng., 11(2), 111-118(1994). 3. Lee, T. J., Kwon, W. T., Chang, W. C. and Kim, J. C., “A Study of Regeneration of Zinc Titanate Sorbents for H2S Removal,” Korean J. Chem. Eng., 14(6), 513-518(1997). 4. Kang, S. H., Rhee, Y. W., Han, K. H., Lee, C. K. and Jin, K. T., “A Study of Desulfurization Reaction using Zinc Titanate at HighTemperature,” HWAHAK KONGHAK, 35(5), 642-648(1997). 5. Park, D. H., Lee, Y. S., Kim, H. T. and Yoo, K. O., “Oxidative Regeneration of Sulfided Sorbent by H2S,” HWAHAK KONGHAK, 30(6), 700-709(1992). 6. Jeon, G. S. and Chung, J. S., “Active and Selective Copper Catalysts Supported on Alkali-Doped Silica for the Dehydrogenation of Cyclohexanol to Cyclohexanone,” Korean J. Chem. Eng., 12(1), 132-133(1995). 7. Westmoreland, P. W. and Harrison, D. P., “Evaluation of Candidate Solid for High-Temperature Desulfurization of Low-But Gases,” Env. Sci. Tech., 10(7), 659-661(1976). 8. Ayala, R. E., Venkataramani, V. S., Javad, A. and Hill, A. H., “Advanced Low-Temperature Sorbent,” Proceedings of the Advanced Coal-Fired Power Systems Sorbent 95 Review Meeting, 1, 407416(1997). 9. Kyotani, T., Kawashima, H., Tomita, A., Palmer, A. and Furimsky, E., “Removal of H2S from Hot Gas in the Presence of CuContaining Sorbents,” Fuel, 68(1), 74-79(1989). 10. Patrick, V. and Gavalas, G. R., “High-Temperature SulfidationRegeneration of CuO-Al2O3 Sorbents,” Ind. Eng. Chem. Res., 28(7),.

(41) 5YÑ ñ CuO-Fe O Z¤f z , 2. 931-940(1989). 11. Yi, K. B., Choi, E. M., Song, Y. K. and Rhee, Y. W., “Low-Temperature Desulfurizing Reaction with Cu-Containing Sorbents,” HWAHAK KONGHAK, 37(5), 795-799(1999). 12. Song, Y. K., Lee, K. B., Lee, H. S. and Rhee, Y. W., “Reactivity of Copper Oxide-Based Sorbent in Coal Gas Desulfurization,” Korean, J. Chem. Eng., 17(6), 691-695(2000). 13. Pineda, M., Palacios, J., Alonso, M. L., Garcia, E. and Moliner, R., “Performance of Zinc Oxide Based Sorbents for Hot Coal Gas Desulfurization in Multicycle Tests in a Fixed-Bed Reac-. 3. 145. tor,” Fuel, 79(8), 885-895(2000). 14. Slimane, R. B. and Abbasian, J., “Utilization of Metal OxideContaining Waste Materials for Hot Coal Gas Desulfurization,” Fuel Processing Technology, 70(2), 97-113(2001). 15. Lee, H. S., Kang, M. P., Song, Y. S., Lee, T. J. and Rhee, Y. W., “Desulfurization Characteristics of CuO-Fe2O3 Sorbents,” Korean, J. Chem. Eng., 18(5), 635-639(2001). 16. Gasper-Galvin, L. D., Atimtay, A. T. and Gupta, R. P., “ZeoliteSupported Metal Oxide Sorbents for Hot-Gas Desulfurization,” Ind. Eng. Chem. Res., 37(10), 4157-4166(1998).. Korean Chem. Eng. Res., Vol. 43, No. 1, February, 2005.

(42)