n. 二烯
1.After the 2~(nd) revamp of Ethylene Plant, the diversified feedstock changed the quality of cracking feedstock, thus inerea- sing the diolefin content in cracking C_5 product.
乙烯装置第二轮改扩建完成后，由于原油来源多样化，使裂解原料的品质改变，造成裂解碳五产品中双烯烃含量增加。
2.After the 2~(nd) revamp of Ethylene Plant, the diversified feedstock changed the quality of cracking feedstock, thus inerea- sing the diolefin content in cracking C_5 product.
乙烯装置第二轮改扩建完成后，由于原油来源多样化，使裂解原料的品质改变，造成裂解碳五产品中双烯烃含量增加。
3.When non-noble metal catalysts are selected for selective hydrogenation of diolefin, full-range FCC gasoline hydrogenation process is preferred.
当选用非贵金属催化剂时，二烯烃选择性加氢单元应优先采用催化裂化全馏分加氢流程；