활성탄, 국내산 무연탄인 장성탄, 중국산 역청탄인 대동탄과 인도네시아산 갈탄으로부터 얻은 char들의 가스화 반응에 미치는 Na₂CO₃, K₂CO₃의 촉매효과룰 상압하에서 고정층 반응기를 사용하여 관찰하였다. 촉매를 사용하면 촉매가 없는 경우에 비해 170℃정도 낮은 반응온도에서도 거의 같은 반응활성를 보였고, 반응특성은 미반응 수축핵 모델로 근사시킬 수 있었다. 가스화 반응속도식은 촉매의 함침량에 따라서 보상효과(compensation effect)를 보였는데, 촉매의 함침에 무관한 반응속도를 보이는 isokinetic 온도는 Na₂CO₃를 촉매를 사용한 활성탄의 경우에 1500K였다. 활성탄의 실험에서 촉매의 함침량이 증가하면 생성물 중의 CO₂/CO 몰비가 증가하였으며, 반응속도도 선형적으로 증가하였으나, 함침량이 15wt% 이상에서는 반응속도와 CO₂/CO몰비는 더 이상 증가하지 않았다. 석탄 char에 촉매를 함침하면 CO생성의 활성화 에너지는 감소하여 CO의 선택성이 증가하였다.

The catalytic effect of K₂CO₃ and N₂CO₃ on stream gasification of various coal chars has been investigated in a fixed-bed type reactor under the atmospheric pressure. Activated carbon and 3 kinds of coal chars obtained from Korean Jangsung anthracite, Chinese Tatong bituminous and Indonesian lignite have been used as samples. Addition of alkaline catalysts such as Na₂CO₃ and K₂CO₃ to the samples has lowered the reaction temperature by about 170℃ for obtaining the same conversion as in the non-catalytic case. The gasification process is well-described by the unreacted shrinking-core model, and the rates show compensation effect as the samples are loaded with catalysts. In case of the Na₂CO₃-loaded activated carbon, the isokinetic temperature is about 1500K. An increase in the catalyst loading enhances the reaction reat and the CO₂/CO molar ratio among products, but the rate and the ratio become almost constant above the catalyst loading of 15wt%. In case of the catalyst-loaded coal chars, activation energy of CO formation is lower and selectivity for CO production is higher than those in the non-catalytic case.

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