摘要
Ｋ２Ｏ是催化剂Ｆｅ－ＭｎＯ／Ｓｉｌｉｃａｌｉｔｅ－２由合成气制低碳烯烃的有效助剂，Ｋ２Ｏ能明显提高催化剂活性及低碳烯烃选择性。Ｋ２Ｏ助剂将抑制部分铁的还原，但能增强催化剂对ＣＯ的吸附能力，从而能提高催化剂活性，抑制甲烷的生成，Ｋ２Ｏ助剂能抑制乙烯在催化剂表面的二次反应（尤其是乙烯的歧化反应），从而提高ＣＯ／Ｈ及反应制低碳烯烃的选择性。
K2O is an available promoter for production of light alkenes from syngas over FeMnO/silicalite-2 catalyst, and it can obviouslyimprove both catalyst activity and selectivityto alkenes. K2O may prohibit reduction of Fepartially, but it can strengthen adsorption ofCO on the catalyst, which is favorable for en-hancing the activity of the catalyst and suppressing the formation of CH4. K2O can increase the selectivity of CO hydrogenation tolight alkenes by inhibiting the secondary reactions of C2H4 on the surface of the catalyst,especially the disproportionation of C2H4.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1994年第6期15-20,共6页
Natural Gas Chemical Industry
基金
国家"八.五"重点科技攻关课题
关键词
合成气
铁锰催化剂
低碳烯烃
氧化钾助剂
silicalite-2 zeolite, syngas,light alkene, Fe-MnO catalyst, K_2O promoter
