水滑石法制备渣油加氢催化剂  

Synthesis of residue-hydrotreating catalysts by hydrotalcite method

作　　者：张春光[1] 谭青峰[1] 张天琪 赵愉生[1] ZHANG Chunguang;TAN Qingfeng;ZHANG Tianqi;ZHAO Yusheng(Petrochemical Research Institute,China National Petroleum Corporation,Beijing 100195,China)

机构地区：[1]中国石油天然气股份有限公司石油化工研究院,北京100195

出　　处：《化工进展》2018年第11期4303-4307,共5页Chemical Industry and Engineering Progress

基　　金：国家重点基础研究发展计划项目(2010CB226903)

摘　　要：用离子交换法合成钼酸盐阴离子柱撑镍铝水滑石,并进一步合成了渣油加氢催化剂(MoO_3-NiO/Al_2O_3)。通过XPS检测发现MoO_3以单分子层存在于催化剂孔道中,其饱和分散容量为4.69μmol/m2。通过XRD分析显示中间产物水滑石结构晶形完好,且置换后晶粒尺寸有所增大。采用低温氮气吸附法研究了不同阶段产物的比表面积、孔容和孔体积的变化规律。采用固定床反应器以沙轻常压混合渣油为原料进行催化剂评价,发现水滑石法制备的催化剂较浸渍法制备的催化剂在金属脱除率、脱硫率、脱氮率和脱残炭率等方面初活性有明显提高,但活性衰减较快,寿命相对较短。Residue-hydrotreating catalyst was prepared from molybate anion pillared Ni-Al hydrotalcite,which was synthesized in advance by ion exchange method.The catalyst was testified by XPS and the result indicated that the MoO3 was dispersed as uni-molecular layer in the pore of the catalyst,and its saturated uni-molecular dispersion capacity was 4.69μmol/m2.XRD results showed that intermediate products were in perfect hydrotalcite structure.The surface area,pore volume and pore diameter of the intermediated products were studied by using N2 adsorption technique.The prepared catalyst was evaluated by hydrotreating the Saudi Arabian light atmospheric residues in a fixed bed reactor and were compared with the catalyst produced by the dipping method.The rates of HDM,HDS,HDN and HDCCR of the prepared catalyst in the initial stage were all higher than those of the catalyst prepared by the dipping method,but its activity decreases rapidly,resulting in a short life.

关 键 词：水滑石 离子交换 加氢 催化剂 

分 类 号：O643.3[理学—物理化学]