低温甲烷化技术在炼油厂聚丙烯原料氢气精制中的应用

对以低温甲烷化技术替代普遍使用的PSA技术来精制聚丙烯原料氢气进行研究，提出设计技术方案；并使用BC-H-10催化剂，利用炼油厂低温热源，进行了低温甲烷化技术脱除炼油厂工业氢中的CO提供聚丙烯原料氢气的工业应用。结果表明，在反应压力1.8 MPa、温度150～155℃、催化剂装填量0.1 m³情况下，改造投资65万元，可将工业氢中CO杂质体积分数稳定降至0.1μL/L以下，低温甲烷化精制氢气规模为300 m³/h,氢气收率99%,高于原使用的PSA法，并节省投资和占地，年降本增效350万元。

APPLICATION OF CRYOGENIC METHANATION TECHNOLOGY IN HYDROGEN REFINING FOR POLYPROPYLENE IN REFINERY

The cryogenic methanation technology was studied to replace the commonly used PSA technology to refine hydrogen for polypropylene raw material,and the technical scheme was designed and put forward.BC-H-10 catalyst was used to remove CO from refinery industrial hydrogen to provide raw material for polypropylene by cryogenic methanation technology with low-temperature heat source in refinery.The results show that the CO impurity content in industrial hydrogen can be reduced to less than 0.1μL/L steadily at the conditions of reaction pressure of 1.8 MPa,temperature of 150-155℃and catalyst loading of 0.1 m³.The scale of cryogenic methanation is 300 m³/h,and the hydrogen yield is 99%,which is higher than the original PSA process.The cryogenic methanation technology can save investment and land occupation,reduce operation cost and increase efficiency by 3.5 million yuan per year.