花状钼酸钴的制备及其好氧氧化脱硫性能  

Preparation of Flower⁃Like Cobalt Molybdate and Its Aerobic Oxidation Desulfurization Performance

作　　者：曹雪 李秀萍[1] 江进 任铁强[1] 赵荣祥[1] CAO Xue;LI Xiuping;JIANG Jin;REN Tieqiang;ZHAO Rongxiang(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China;Zhejiang Petroleum and Chemical Co.Ltd.,Zhoushan Zhejiang 316299,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]浙江石油化工有限公司,浙江舟山316299

出　　处：《辽宁石油化工大学学报》2024年第2期14-21,共8页Journal of Liaoning Petrochemical University

基　　金：辽宁省自然科学基金指导计划项目(2019-ZD-0064)。

摘　　要：有氧氧化脱硫是一种安全环保的脱硫方法,但是氧气常需要在较为苛刻的条件下才能被激活,合成高效的有氧氧化脱硫催化剂是提高脱硫活性的有效途径。以氯化钴、钼酸铵为原料,以尿素为沉淀剂和结构控制剂,采用一步水热法合成了大比表面积的花状钼酸钴(CoMoO_(4))。通过FT-IR、XRD、SEM、XPS和N_(2)-吸附脱附技术确定了催化剂的形貌和结构特征;以CoMoO_(4)为催化剂、氧气为氧化剂,氧化脱除模拟油中的二苯并噻吩,考察了温度、氧气流量、催化剂质量以及硫化物类型对氧化脱硫的影响;此外,研究了花状CoMoO_(4)的循环使用性能。结果表明,在最适宜的反应条件下,脱硫率达到98.2%;催化剂循环使用5次后,氧化脱硫活性无明显降低,超氧自由基的形成提高了脱硫活性。Aerobic oxidative desulfurization is a safe and environmentally friendly desulfurization method,but oxygen usually needs to be activated under harsh conditions,the synthesis of efficient catalyst is an effective way to improve desulfurization activity.In this work,flower-like cobalt molybdate with large specific surface area was synthesized by one-step hydrothermal method using cobalt chloride and ammonium molybdate as raw materials.In addition,urea is used as precipitation agent and structure control agent.The morphology and structure of the CoMoO_(4)were characterized by FT-IR,XRD,SEM,XPS and N_(2) adsorption desorption techniques.Dibenzothiophene in simulated oil was removed using CoMoO_(4)as catalyst and molecular oxygen as oxidant.The effects of reaction temperature,the flow of oxygen,the amount of CoMoO_(4)and the type of sulfur compounds on the desulfurization rate were investigated.In addition,the recycling performance of flower-like CoMoO_(4)was studied.The experiment shows that the desulfurization rate can reach 98.2%under the optimal reaction conditions.The catalyst can be reused for 5 times without significant reduction in oxidative desulfurization activity.The formation of superoxide radical in the oxidation desulfurization process resulting in high desulfurization activity.

关 键 词：CoMoO_(4) 氧化脱硫 花状 比表面积 超氧自由基 

分 类 号：TE624[石油与天然气工程—油气加工工程]