燃料化学学报Issue(11)：1311-1319,9.
负载碳酸钾煤焦-CO2催化气化反应特性的原位研究
In-situ analysis of catalytic gasification reaction characteristics of coal char-CO2 with K2 CO3 additive
摘要
Abstract
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.关键词
原位高温热台/碳酸钾/熔融/催化气化Key words
in-situ heating stage/K2 CO3/fusion/catalytic gasification分类
化学工程引用本文复制引用
卫俊涛,丁路,周志杰,于广锁..负载碳酸钾煤焦-CO2催化气化反应特性的原位研究[J].燃料化学学报,2015,(11):1311-1319,9.基金项目
The project was supported by the National Natural Science Foundation of China (21376081) and the National High Technology Research and Development Program of China (863 Program,2012AA053101).国家自然科学基金(21376081)和国家高技术研究发展计划(863计划,2012AA053101)资助项目 （21376081）
