反应条件对Ti改性的Ni-Mo/Al_2O_3和Co-Mo/Al_2O_3催化剂上焦化粗苯低温加氢脱硫的影响  

Influence of reaction conditions on hydrodesulfurization of coking crude benzol over Ti-modified Ni-Mo/γ-Al_2O_3 and Co-Mo/γ-Al_2O_3

作　　者：王俊文[1] 毛喜迎[1] 马春旭[1] 赵煜[1] 张林香[1] 刘宏琦 

机构地区：[1]太原理工大学化学化工学院,山西太原030024 [2]山西安胜环能科技有限公司,山西太原030009

出　　处：《天然气化工—C1化学与化工》2010年第3期39-42,共4页Natural Gas Chemical Industry

基　　金：山西省归国留学人员基金(2007-36);山西省青年科技基金(20051009)

摘　　要：采用浸渍法,制备了焦化粗苯低温加氢用Ti改性Ni-Mo/Al2O3预加氢催化剂和Ti改性Co-Mo/Al2O3主加氢催化剂。采用预-主两段式固定床反应装置,以焦化苯中的噻吩含量为指标,考察了温度T、压力P、空速LHSV以及氢/油体积比等操作条件的影响。实验结果表明:温度T对噻吩的脱除影响最为显著,随反应温度升高产物中噻吩含量呈"先降后升"趋势,应控制在270℃～340℃为宜;在T为270℃～340℃、P为2.1 MPa～2.9MPa、LHSV为0.25 h-1～0.75/h-1及氢/油体积比为600～800的工艺条件下,均可使噻吩质量含量由粗苯中的4332×10-6下降到加氢油中的1×10-6以下,其最小值可达0.35×10-6。Ti-modified Ni-Mo/γ-Al2O3 pre-hydrotreating catalyst（A） and Ti-modified Co-Mo/γ-Al2O3 main hydrotreating catalyst（B） were prepared by impregnation method,and a two fixed-bed reactor with catalyst A in first bed and B in second bed was used to investigate the influence of reaction conditions on the hydrodesulfurization avtivity of the catalysts in hydrorefining of coking crude benzol.The results showed that temperature had the most significant influence on the reaction,and the hydrodesulfurization rate of thiophene increased firstly and then decreased with the increase of experimental temperature,and the optimum reaction temperature range was 270～340℃;the mass fraction of thiophene could be reduced from 4332×10^-6 in coking crude benzol to below 1×10^-6（minimum 0.35×10^-6） in hydrogenated oil under the reaction conditions： temperature of 270～340℃,pressure of 2.1～2.9MPa,LHSV of 0.25～0.75 h^-1 and H2（g）/Oil（l） volume ratio of 600～800.

关 键 词：焦化粗苯 加氢脱硫 Ti改性催化剂 噻吩 

分 类 号：O643[理学—物理化学]