CDHDS模块脱硫催化剂在加氢醚化装置上的工业应用

Industrial application of CDHDS modular desulfurization catalyst in hydrogenation etherification unit

基于汽油产品质量升级的需求,美国鲁姆Lummus提供工艺包和催化剂,主要目的是降低催化汽油烯烃和硫含量,并提高汽油辛烷值,将低附加值甲醇转化为高附加值汽油,该技术在中国石油青海油田格尔木炼油厂250 kt·a^(-1)催化汽油加氢醚化装置上工业应用,结果表明,针对催化汽油的重汽油组分单独使用催化蒸馏脱硫技术(CDHDS)加氢脱硫,辛烧值损失远大于采用“CDHDS+GARDES”组合加氢脱硫,辛烷值损失平均值从12个单位降至6.6个单位。辛烷值损失通过采用合适加氢技术可以控制,CDHDS催化剂性能与格尔木炼油厂催化重汽油性能匹配性存在不足,具有较高的在线生产时间系数,重汽油加氢后硫、硫醇达到技术指标,辛烷值损失偏大。

Based on the demand for upgrading the quality of gasoline products,Lummus of the United States provides process packages and catalysts with the main purpose of reducing the olefin and sulfur content of catalytic gasoline,improving the octane number of gasoline,and converting methanol with low added value into gasoline with high added value.The industrial application of this technology in the 250 kt·a^(-1) gasoline hydroetherification unit of Golmud Refinery shows that the octane number loss in CDHDS hydrodesulfurization alone for the heavy gasoline components of FCC gasoline is much greater than that in“CDHDS+GARDES”combined hydrodesulfurization,and the average octane number loss is greatly reduced from 12 units to 6.6 units,which can be controlled by adopting appropriate hydrogenation technology.The performance of CDHDS catalyst is insufficient to match the properties of catalytic heavy gasoline from Golmud Refinery,which has a higher on-line production time coefficient.After hydrogenation of heavy gasoline,the sulfur and mercaptan reach the technical index,and the octane number loss is too large.