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 LIU Bin,PAN Zhigang,TAO Yaqiu,et al.Synthesis of low loading MoS2/3A molecular sieve catalysts and its hydrodesulphurization performance[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2014,36(03):52-56.[doi:10.3969/j.issn.1671-7627.2014.03.010]





Synthesis of low loading MoS2/3A molecular sieve catalysts and its hydrodesulphurization performance
南京工业大学 材料科学与工程学院,江苏 南京 210009
LIU BinPAN ZhigangTAO YaqiuTAO LuluLI ChengliangZHU Shemin
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
MoS2 3A分子筛 加氢脱硫 催化剂 Co掺杂
MoS2 3A molecular sieve hydrodesulphurization catalysts Co-doping
以四硫代钼酸铵为前驱体,采用等体积浸渍法制备一系列MoS2和Co掺杂的3A分子筛催化剂,并采用X线衍射仪(XRD)、比表面积分析仪(BET)和扫描电子显微镜(SEM)对催化剂进行表征分析。以噻吩/环己烷为模拟油,考察催化剂的加氢脱硫(HDS)活性。结果表明:在免预硫化、低负载量(0.5%Mo)的条件下,MoS2/3A分子筛催化剂的催化活性为97%; Co掺杂的MoS2/3A分子筛催化剂,其HDS活性接近100%; 此外,在相同反应条件和制备方法下,MoS2/3A催化剂的催化活性均高于MoS2/γ-Al2O3和 MoS2/堇青石催化剂。由此表明,采用3A分子筛替代传统的γ-Al2O3和蜂窝堇青石作为载体不仅降低了MoS2的负载量,节约了成本,而且还有效地提高了催化剂的HDS活性; 且Co的掺杂进一步促进了催化剂活性的提高。
A series of MoS2 and Co doped MoS2/3A molecular sieve catalysts were prepared by impregnation using ammonium tetrathiomolybdate as precursor. The obtained catalysts were investigated by X-ray diffraction(XRD), specific surface area(BET)and scanning electron microscope(SEM). The hydrodesulphurization(HDS)evaluation was carried out with thiophene/cyclohexane as model oil on a fixed bed reactor. Results indicated that the synthesized catalysts exhibited high catalytic activity(97%)in the case of free prevulcanization and low loading(0.5%Mo). The hydrodesulphurization activity of Cobalt doped MoS2/3A molecular sieve catalyst reached up to nearly 100%. The synthesized catalysts presented much higher activity than the MoS2/γ-Al2O3 and cordierite honeycomb catalysts prepared with the similar method under the same reaction conditions. It suggested that the catalyst by the substitution of the conventional γ-Al2O3 and cordierite honeycomb carriers with 3A molecular sieves of low loaded MoS2 increased the hydrodesulphurization activity. The doping of Co further promoted the improvement of the catalyst activity.


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基金项目:国家自然科学基金(21107049); 江苏高校优势学科建设工程
作者简介:刘彬(1989—),男,江苏南京人,硕士生,主要研究方向为加氢脱硫、催化环保; 潘志刚(联系人),副研究员,E-mail:zg_pan@163.com..
更新日期/Last Update: 2014-05-20