含氮化合物对柴油超深度加氢脱硫催化剂运行稳定性的影响  

Effect of Nitrogen Compounds on the Running Stability of Ultra-Deep Hydro-desulfurization Diesel Catalyst

作　　者：葛泮珠 丁石[1] 张乐[1] 李大东[1] 聂红[1] GE Panzhu;DING Shi;ZHANG Le;LI Dadong;NIE Hong(Research Institute of Petroleum Processing,SINOPEC,Beijing 100083,China)

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2019年第1期1-10,共10页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点研发计划项目(2017YFB0306604)资助

摘　　要：采用中型固定床加氢装置考察了含氮化合物对柴油超深度加氢脱硫Ni-Mo-W型催化剂运行稳定性的影响。通过元素分析、N_2吸附-脱附、热重-质谱(TG-MS)联用、X射线光电子能谱(XPS)、高分辨透射电镜(TEM)等表征手段研究了催化剂失活的主要原因。实验结果表明:原料添加含氮化合物后,主要影响了催化剂的初活性,运转初期反应温度提高了7～10℃,但对催化剂的稳定性影响不大。根据催化剂失活原因的分析发现,原料添加含氮化合物前后,催化剂失活的主要原因均与其表面积炭的形成、孔体积的损失和边缘W比例的下降密切相关。With using Ni-Mo-W/γ-Al2O3 catalyst,effect of nitrogen compounds on the running stability of ultra-deep hydro-desulfurization diesel catalyst was studied on a pilot plant unit.The reasons of catalyst deactivation were investigated by different characterization techniques which included elemental analysis,nitrogen adsorption-desorption,thermal gravity-mass spectrometry（TG-MS）,X-ray photoelectron spectroscopy（XPS）and high resolution transmission electron microscopy（TEM）.Experimental results suggest that nitrogen compounds mainly impact on catalyst initial activity,and lead to initial reaction temperature 7 to 10 ℃ higher.However,nitrogen compounds have little impact on catalyst stability.With/without nitrogen compounds adding into the feedstocks,the main reasons of catalyst deactivation are all mainly related to the surface coking,loss of pore volume and decrease of edge tungsten.

关 键 词：超深度加氢脱硫柴油 催化剂失活 含氮化合物 

分 类 号：TE624[石油与天然气工程—油气加工工程]