摘要
研制出改良MTG两段法的两段催化剂。固定一段催化剂,对二段分子筛催化剂进行了评选对比和特性考察。研究了不同反应条件(温度、压力和空速)对自合成气合成汽油反应催化剂的活性,选择性以及尾气、油品组成等的影响。结果表明,所合成的新型分子筛催化剂具有活性高、选择性好、寿命长的特性。适当升高一段反应温度有利于二甲醚的生成和CO转化率的增加。二段反应温度的升高可促进C_5^+的生成。随着一段反应压力升高,CO转化率增加。空速明显影响CO转化率,加大空速有利于低碳烃的生成。
Catalysts for improved MTG method for gasoline synthesis have been prepared. The different zeolites were evaluated and compared with the of newly developed zeolite, with the same first stage catalyst. The effect of reaction conditions(temperature, pressure and space velocity, etc.) on the activity of catalysts as well as on the composition of gasoline obtained was studied. The results showed that the new zeolite catalyst had high activity, good selectivity and stability. The experiment data also revealed that the formation of dimethyl ether and the conversion of CO increased when the first stage reaction temperature was raised slightly. It is favorable to the formation of C_5^+ hydrocarbons to raise the temperature in the second-stage. Increasing the pressure in the first stage resultsd in favor of conversion of CO. Higher space velocity led to more C_1-C_3 hydrocarbon formation.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1990年第3期247-252,共6页
Journal of Fuel Chemistry and Technology
