CAJ | 학술논문

以碳酸钾为催化剂，通过高温热台原位研究气化阶段神府/遵义煤焦与催化剂的交互作用，采用热重分析仪，考察气化温度(750~950℃)、催化剂负载量(钾离子负载量2.2%、4.4%、6.6%(质量分数))对煤焦气化反应性的影响。结果表明， K2 CO3有利于促进神府/遵义煤热解过程孔隙结构的发展。气化温度低于碳酸钾熔点时，大部分煤焦颗粒与CO2的反应以颗粒收缩形式进行，当气化温度高于碳酸钾熔点时，对于神府煤焦，随着碳骨架快速消耗，在反应后期可观察到明显的熔融态钾催化剂扩散现象；而对于遵义煤焦，其碳骨架稳定消耗缓慢，大部分熔融态钾催化剂存在于煤焦表面。神府/遵义煤焦气化反应活性随碳酸钾负载量的增加而提高。钾催化剂对神府煤焦的催化作用随气化温度的升高先增强后减弱，转折温度点接近碳酸钾熔点，原因为熔融态钾催化剂流动性好，造成部分孔隙结构堵塞，导致钾催化剂催化作用减弱。
이탄산갑위최화제，통과고온열태원위연구기화계단신부/준의매초여최화제적교호작용，채용열중분석의，고찰기화온도(750~950℃)、최화제부재량(갑리자부재량2.2%、4.4%、6.6%(질량분수))대매초기화반응성적영향。결과표명， K2 CO3유리우촉진신부/준의매열해과정공극결구적발전。기화온도저우탄산갑용점시，대부분매초과립여CO2적반응이과립수축형식진행，당기화온도고우탄산갑용점시，대우신부매초，수착탄골가쾌속소모，재반응후기가관찰도명현적용융태갑최화제확산현상；이대우준의매초，기탄골가은정소모완만，대부분용융태갑최화제존재우매초표면。신부/준의매초기화반응활성수탄산갑부재량적증가이제고。갑최화제대신부매초적최화작용수기화온도적승고선증강후감약，전절온도점접근탄산갑용점，원인위용융태갑최화제류동성호，조성부분공극결구도새，도치갑최화제최화작용감약。
Interactions of catalyst ( K2 CO3 ) with Shenfu ( SF )/Zunyi ( ZY ) char during gasification were observed by in-situ heating stage microscope. The effects of gasification temperature (750~950℃) and catalyst loading amount (2. 2%, 4. 4%, 6. 6%) were investigated in a thermogravimetric analyzer. The results show that loading K2 CO3 on SF/ZY stimulates development of pore structure in pyrolysis process. The in-situ heating stage experiments indicates that most of the char particles react with CO2 in shrinking core mode below the melting point of K2 CO3 . Above this temperature, for SF char, obvious molten potassium catalyst diffusion can be observed in the later reaction stage with rapid consumption of carbon skeleton;but for ZY char, most of the molten potassium exists on the surface of coal char with slower consumption of stable carbon skeleton. Gasification reactivity of SF/ZY char increases with increasing loading amount of K2 CO3 . Catalytic efficiency of potassium catalyst on SF char initially increases and then decreases with gasification temperature, the turning point of gasification temperature is close to the melting point of K2 CO3 . This may be due to blocking of a fraction of pore structure resulted from the good fluidity of molten potassium catalyst.