摘要
采用沉淀法以拟薄水铝石为铝源制备了高镍加氢催化剂,考察了催化剂处理重整抽余油的加氢活性、稳定性以及不同硫化物的原料适应性。研究结果表明:与苯加氢工业催化剂相比,采用并流沉淀法制备的高镍加氢催化剂具有更小的晶粒粒径(10~20 nm)、均一的形貌及更高的金属分散度(约13.8%);催化剂经Mg助剂改性后改善了Ni的电子性能,有助于提高Ni活性组分的加氢活性与稳定性;在温度120℃、压力1 MPa、体积空速1 h^(-1)条件下,针对重整抽余油原料(芳烃体积分数为3%、烯烃体积分数为1%、硫质量分数为10.3 mg/kg),实现烯烃和芳烃的100%脱除,与苯加氢工业催化剂对比,其抽余油加氢稳定时间延长3倍;相比含硫醇原料,吸附能更低的噻吩硫化物更容易被镍活性位吸附,促进形成不可逆的Ni—S共价键,对高镍加氢催化剂稳定性影响较大。
The high nickel hydrogenation catalyst was prepared by coprecipitation method using pseudo-boehmite as aluminum source.The hydrogenation activity,stability and feedstock adaptability of the catalyst with different sulfides during processing reformate raffinate were investigated.The results show that compared with industrial catalyst for benzene hydrogenation,the high nickel hydrogenation catalyst prepared by co-precipitation has smaller grain size(10—20 nm),regular morphology and higher metal dispersion(about 13.8%).The catalyst modified with Mg assistant has improved the electronic properties of Ni,and promoted the hydrogenation activity and stability of Ni active components.At the temperature of 120℃,pressure of 1 MPa,and volume space speed of 1 h^(-1),100%olefins and aromatics can be removed from reformate raffinate feedstock(aromatics volume fraction of 3%,olefins volume fraction of 1%,and sulfur mass fraction of 10.3 mg/kg).Compared with industrial catalyst for benzene hydrogenation,the hydrogenation stability time of reformate raffinate can be extended by three times.Compared with thiol-containing feedstock,thiophene-containing feedstock with lower adsorption energy is more likely to adsorb to the nickel active sites and promote the formation of irreversible Ni—S covalent bond,which has a large effect on the stability of high nickel hydrogenation catalyst.
作者
张然
张雅琳
吴培
吕忠武
宋绍彤
李荣观
徐华
鞠雅娜
顾明
ZHANG Ran;ZHANG Yalin;WU Pei;L Zhongwu;SONG Shaotong;LI Rongguan;XU Hua;JU Ya′na;GU Ming(PetroChina Petrochemical Research Institute,Beijing 102206,China;PetroChina Liaoyang Petrochemical Company,Liaoyang 111003,China)
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2024年第2期359-370,共12页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
中国石油科技部项目(2021DJ5701)基金资助。
关键词
重整抽余油
镍催化剂
共沉淀
苯加氢
硫化物
reformate raffinate
Ni catalyst
coprecipitation
benzene hydrogenation
sulfide
作者简介
第一作者:张然,女,工程师,硕士,从事汽油加氢催化剂研究,Tel:010-80165355,E-mail:zhangran010@petrochina.com.cn;通讯联系人:鞠雅娜,女,教授级高级工程师,硕士,从事汽油加氢催化剂研究,Tel:010-80165353,E-mail:juyana@petrochina.com.cn。
