不同P负载量对Co-Mo/γ-Al_2O_3煤焦油加氢脱硫性能影响的研究  

Effect of phosphorus loadings on the performance of Co-Mo/γ-Al_2O_3 in hydrodesulfurization of coal tar

作　　者：胡乃方 崔海涛[1] 邱泽刚[3] 赵亮富[1] 孟欣欣[4] 赵正权 敖广宇 

机构地区：[1]中国科学院山西煤炭化学研究所应用催化与绿色化工实验室,山西太原030001 [2]中国科学院大学,北京100049 [3]西安石油大学化学化工学院,陕西西安710065 [4]太原理工大学化学化工学院,山西太原030024 [5]赤峰博元科技有限公司,内蒙古赤峰025350

出　　处：《燃料化学学报》2016年第6期745-753,共9页Journal of Fuel Chemistry and Technology

基　　金：中国科学院战略性先导科技专项(XDA07020200);中国科学院战略性先导科技专项"天然气"(XDA05010302);鲁奇炉气化煤焦油加氢技术开发(CFBYKJ-JSFW-01-2014)项目资助~~

摘　　要：以分步浸渍法在固定MoO_3、CoO含量(质量分数)为13.50%、2.11%的条件下,通过改变磷酸浓度,制备了不同P负载量的Co-Mo/γ-Al_2O_3催化剂。考察了不同的P负载量催化剂对内蒙古赤峰中温煤焦油加氢脱硫性能的影响。并以NH3程序升温脱附(NH_3-TPD)、X射线衍射(XRD)、X射线光电子能谱(XPS)等手段对催化剂的结构性质进行了表征。结果表明,适宜的P负载量可减弱活性组分与载体间的相互作用,利于活性组分均匀分散在载体表面,改善了催化剂的还原、硫化性能和酸性分布,从而提高了催化剂的加氢脱硫活性。当磷酸质量分数为4%时,催化剂表现出最佳的加氢脱硫性能,硫脱除率达到96.98%。不同P负载量Co-Mo/γ-Al_2O_3催化剂加氢脱硫活性对应的磷酸浓度顺序为:4%>2%>6%>1%>0>8%。With the fixed loadings of molybdenum oxide of 13.50% and cobalt oxide of 2.11%,respectively,the Co-Mo / γ-Al_2O_3 catalysts were modified by adding different mass concentration of phosphoric acid via separate-step impregnation method.The effect of different phosphorus loadings of catalysts on the hydrodesulfurization performance was studied using middle temperature coal tar from Chifeng,Inner Mongolia.The structural properties of catalysts were characterized by the temperature programmed desorption of NH_3（ NH_3-TPD）,XRD,XPS and other methods.The results showthat a proper loading of phosphorus can weaken the interaction between the support and the active components,improve the dispersion of active compents on the surface of support,and promote the reduction and sulfuration of the active components and the distribution of acid,which can improve the hydrodesulfurization performance of the catalysts.The catalyst prepared with the phosphoric acid of 4% concentration exhibits the highest hydrodesulfurization activity with the sulfur removal of96.98%.The effect of mass concentration of phosphoric acid on the hydrodesulfurization activety of the prepared catalysts is in the order of 4% 〉2%〉 6% 〉1% 〉0〉8%.

关 键 词：P改性 钴钼催化剂 煤焦油 加氢脱硫 

分 类 号：TQ519[化学工程]