Abstract
Decomposition reaction of methanol was conducted on Ni-Cu/SiO$_2$catalysts with several variables. Variables used in this study are S.V(Space Velocity), partial pressure of methanol, reaction temperature, and composition rate of Ni-Cu. The range of S.V is 10,000-30,000h$\^$-1/, the temperature range is 150-400$^{\circ}C$ and values of Cu/(Ni＋Cu) are 0, 0.25, 0.5, 0.75, and 1. Over Ni/SiO$_2$, and Ni-Cu/SiO$_2$, the conversion rate of decomposition reaction of methanol arrived at 100% with increasing of temperature. At this time the selectivity of CO on Ni/SiO$_2$, was suddenly decreased, but on Ni-Cu/SiO$_2$, it was still sustained highly. The main products of reaction were CO and H$_2$, and by-products were CO$_2$ and CH$_4$mainly.
Ni-Cu를 SiO$_2$에 담지시켜 공간속도(Space Velocity; S.V), 메탄올 분압, 반응온도 및 Ni-Cu 조성비에 따른 메탄올 분해 반응의 활성을 조사하였다. S.V는 10,000~30,000h$^{-1}$, 반응온도는 150~40$0^{\circ}C$까지 변화시켰으며 Cu/(Ni＋Cu)비는 0, 0.25, 0.5, 0.75, 1로 변화시켜 보았다. Ni 단일 촉매의 경우 온도가 상승하면서 전환율이 100%에 도달함에 따라 CO의 선택도가 급감소하는 반면 Ni에 Cu를 첨가함으로써 높은 선택도를 유지하였다. 반응의 주생성물로서 CO와 H$_2$가 생성되었고 $CO_2$와 CH$_4$가 부생성물로서 주로 생성되었다.
