载体焙烧温度对催化剂加氢降残炭活性的影响  

EFFECT OF CALCINATION TEMPERATURE OF SUPPORT ON PERFORMANCE OF CARBON RESIDUE REDUCTION OF HYDROGENATION CATALYST

作　　者：张轩[1] 杨清河[1] 胡大为[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2014年第11期13-17,共5页Petroleum Processing and Petrochemicals

基　　金：中国石油化工股份有限公司合同项目(112150)

摘　　要：考察了载体焙烧温度对催化剂物性结构及加氢降残炭活性的影响。采用BET,H2-TPR,HRTEM等手段对载体和催化剂进行了表征,并用高压釜对催化剂的加氢降残炭性能进行评价。结果表明,随着载体焙烧温度的增加,载体的比表面积逐渐减小,平均孔径增大,表面羟基数量减少。将通过不同焙烧温度得到的氧化铝载体制成催化剂后,发现随着载体焙烧温度的升高,载体表面羟基数量减少,金属与载体间的相互作用逐渐减弱,从而使硫化后的催化剂MoS2片晶结构发生改变,即随着焙烧温度的升高,MoS2片晶逐渐变大,积聚程度增加。催化剂的实际油品降残炭与脱硫性能评价结果发现600℃焙烧的载体所制成的催化剂降残炭活性最高。The effect of calcination temperature of Al2O3 support on physical structure and on the performance of the catalysts prepared was studied.The support and catalysts were characterized by BET,TPR and TEM techniques.The carbon residue reduction（HDCCR）activity of hydrogenation catalyst was conducted using an autoclave.It is shown that with increasing calcination temperature,specific surface area of the support decreases,mean pore size enlarges,the number of—OH group on the support surface decreases,which weakens the interaction between metal and support.It is found that the calcination makes the structure of MoS2 slab change.With increasing calcination temperature,the slab size becomes larger,leading to a lower dispersion.The HDCCR activity of the catalyst reaches the best when the support is calcined at 600℃.

关 键 词：渣油加氢 降残炭 氧化铝载体 催化剂 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]