炼油厂对催化原料油进行加氢预处理可起到 5点作用 :①脱硫 ,可使汽油含硫量达到规格 ,并可减少氧化硫的排放量 ;②脱氮 ,减少或避免催化裂化沸石催化剂的活性中心中毒 ;③使稠环芳烃饱和转化为环烷烃 ,较易裂化生成高价值产品 ;④脱除金属以使催化裂化加工更重的原料油 ,并能 Refinery hydrogenation of the catalytic feedstock pretreatment can play a 5-point role: ① desulfurization, gasoline sulfur content can reach specifications, and can reduce sulfur oxide emissions; ② denitrification, to reduce or avoid catalytic cracking of zeolite catalyst Of the poisoning of the active center; ③ so that the aromatic ring saturated hydrocarbons into naphthene, more easily cracked to generate high-value products; ④ metal removal so that the catalytic cracking of heavier feedstock oil, and can