由于石油产品规格标准的日趋严格和加工的原油质量变差，使氢气的需求量增加。炼厂许多装置的废气中含有丰富的氢气，如催化重整的废气含氢量为65％～90％，催化裂化的废气含氢量为10％～20％，而乙烯装置废气的含氢量达到70％～90％。目前氢气回收技术主要有膜分离、变压吸附 Due to the increasingly stringent standards for petroleum products and the deterioration of the quality of processed crude oil, the demand for hydrogen increases. Exhaust gas from many plants in refinery plants is rich in hydrogen, such as catalytic reforming with a hydrogen content of 65% -90% and catalytic cracking with a hydrogen content of 10% -20%, while hydrogen content of the ethylene plant exhaust Reached 70% ~ 90%. The current hydrogen recovery technology mainly membrane separation, pressure swing adsorption