탄화텅스텐 제조를 위한 WO<sub>3</sub>의 CO 환원-탄화반응에 있어서 제올라이트-HX, -NaX, 그리고 -KX의 촉매적 거동에 관한 연구

(1)

(2)

(3)

Time (min)

0 50 100 150 200 250 300

The a m o unt o f a ccum u la te d C O c o nsu m p tio n (m l)

0 200 400 600 800 1000 1200 1400

zeolite-HX zeolite-NaX zeolite-KX only WO

3

Time (min)

0 50 100 150 200 250 300

T h e am ou nt of accum u lat ed C O

2

pr o d uc ti o n ( m l) 0 200 400 600 800 1000 1200

zeolite-HX zeolite-NaX zeolite-KX only WO

₃

Time (min)

50 100 150 200 250 300

The a m ou nt of CO co nsum pt io n an d CO

2

pro duct io n ( m l)

0 5 10 15 20

CO consumption CO

2

production

Time (min)

50 100 150 200 250 300

The a m o unt o f C O c o ns um pt io n a nd C O

2

pro d u cti on ( m l)

0 5 10 15 20

consumption of CO

production of CO

₂

(4)

Time (min)

50 100 150 200 250 300

0 5 10 15 20

consumpton of CO production of CO

₂

T h e am ou n t of C O con sum p ti o n an d CO

2

p ro d u cti o n (m l)

Time (min)

50 100 150 200 250 300

0 5 10 15 20

consumption of CO production of CO

2

T h e a m o unt o f C O co ns um pt io n a nd C O

2

p rod uct ion ( m l)

Temperature (×)

100 200 300 400 500

Ar ea (C O, CO

2

) / a .u .

0 1000 2000 3000 4000 5000 6000

zeolite KX-CO desorption zeolite KX-CO

2

production zeolite NaX-CO desorption zeolite NaX-CO

2

production zeolite HX-CO desorption

Temperature (×)

0 100 200 300 400 500

Are a / a .u.

0 5e+4 1e+5 2e+5 2e+5 3e+5 3e+5

NaX-CO

2

desorption

HX-CO

₂

desorption

KX-CO

2

desorption

(5)

Binding Enegy (eV)

20 25 30 35 40 45 50

In te n sit y / a .u .

with zeolite-NaX without catalysts raw WO

3

Binding Energy (eV)

520 525 530 535 540 545 550

In te n si ty / a.u .

with zeolite-NaX

without catalysts

raw WO

₃

(6)