添加剂对煤焦催化气化特性的影响

在自行搭建的热重分析仪上进行恒温下煤焦的催化气化实验。通过添加剂对催化剂进行预处理,可能使得催化剂有着更好的催化效果。研究了氨水和冰乙酸两种添加剂催焦样催化气化的影响,催化剂分别为CaO和Fe(NO_3)_3。分别在780、810、850、900℃进行了气化实验。研究结果表明:两种添加剂对原煤焦的气化过程影响很小;对于CaO的催化气化,氨水能起到促进气化过程的作用,冰乙酸使得催化气化反应性降低;对于Fe(NO_3)_3的催化气化,冰乙酸能促进催化气化过程,氨水则使得催化气化反应性降低。

Effect of Additives on Catalytic Gasification Characteristics of Coal Char

Experiments on catalytic gasification of coal char under constant temperature were carried out on a thermogravimetric analyzer constructed by ourselves. The catalyst was pretreated by using additives in order to obtain better catalytic effect. Using CaO and Fe(NO3)3 as the catalyst respectively, the effect of two additives including ammonia water and glacial acetic acid on catalytic gasification of coke was studied. The gasification experiments were carried out at 780, 810, 850 and 900℃.The results showed that, the two additives had little effect on the gasification process of the original char. For the catalytic gasification of CaO, ammonia water promoted the gasification process, and glacial acetic acid reduced the catalytic gasification reactivity. For the catalytic gasification of Fe (NO3)3,glacial acetic acid promoted the catalytic gasification process, while ammonia water reduced the catalytic gasification reactivity.