焦炉煤气制甲醇的工艺技术研究

Study on Methanol Production Technology from Coke Oven Gas

焦炉煤气制甲醇的关键技术是净化脱硫与烷烃转化。脱除噻吩、硫醚、硫醇类有机硫是干法脱硫的主要目标,加氢转化有机硫并防止发生甲烷化副反应是加氢转化脱硫的技术难点,组合式两级转化、两级吸收是精脱高浓度有机硫的优选方案。催化部分氧化工艺是目前焦炉煤气烷烃转化的主要技术手段。及时移走反应热以防止合成催化剂过热失活同时副产高品质蒸汽是甲醇合成反应器的基本技术要求。低压法合成甲醇催化剂的活性与选择性是决定甲醇合成效率和副反应产率的关键。

Purification desulfurization and alkane conversion are crucial technologies for methanol production from coke oven gas. The removal of organic sulfur such as thiofuran, thioether and mercaptan is the main objective of dry desulfurization, and hydroconversion of organic sulfur and preventing the methanation side reaction are the technological difficulties of hydroconversion desulfurization. The combination of two-level conversion and two-level absorption is the preferential scheme for refined removal of high-concentration organic sulfur. The catalytic partial oxidation process is now the main technology method for conversion of alkane in coke oven gas. The basic technical requirement for methanol synthesis reactor is moving reaction heat in time to prevent the synthetic catalyst from superheating and being inactivated, and meanwhile byproducing the high quality steam. The activity and selectivity of catalyst for synthesizing methanol under low pressure are the crucial factors to determine the methanol synthesis efficiency and the side reaction rate.