摘要
以含有硫化物的石油醚溶液为催化裂化汽油的模拟原料,考察了硫化氢、二硫化物、硫醚和噻吩等硫化物及胶质对固载型催化裂化汽油脱臭催化剂活性的影响。实验结果表明,硫化氢能中和催化剂上的碱性中心,从而使催化剂的活性明显降低;二硫化物、硫醚和噻吩能吸附在催化剂表面,覆盖催化活性中心,从而使催化剂的活性降低;胶质既能在催化剂的表面和微孔中吸附,覆盖催化活性中心,又能中和催化剂的碱性中心,这两种作用使催化剂活性显著降低。几种硫化物及胶质对催化剂活性的影响顺序由大到小为:胶质>硫化氢>二硫化物、硫醚和噻吩。
Effects of gum and several sulfur compounds including hydrogen sulfide, disulfide, thioether and thiophene on activity of immobilized catalyst in mercaptan oxidation sweetening were investigated. The catalytic activity of immobilized catalyst reduced due to neutralization of hydrogen sulfide in the feedstock with basic sites on the catalyst, moreover disulfide, thioether and thiophene adsorbed on surface of immobilized catalyst covered the active sites of catalyst, so the activity of the catalyst lowered. Similarly, the gum not only adsorbed on both surface and micropores of immobilized catalyst, but also neutralized its basic sites, so the catalyst activity lowered significantly. Order of above mentioned sulfur compounds and gum in affecting activity of the catalyst was as follows ： gum 〉 hydrogen sulfide 〉 disulfide ≈ thioether ≈thiophene.
出处
《石油化工》
CAS
CSCD
北大核心
2009年第11期1190-1193,共4页
Petrochemical Technology
关键词
硫化物
胶质
固载型催化剂
催化裂化汽油
脱臭
硫醇
sulfide
gum
immobilized catalyst
fluidized catalytic cracking gasoline
sweetening
mercaptan
