造孔剂脱除方式对VPO催化剂性能的影响  

Effect of removing pore forming reagent on the performance of VPO catalyst

作　　者：张东顺[1] 师慧敏[1] 张作峰[1] 韩鑫宇 冯晔 ZHANG Dongshun;SHI Huimin;ZHANG Zuofeng;HAN Xinyu;FENG Ye(Sinopec(Beijing)Research Institute of Chemical Industry Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中石化(北京)化工研究院有限公司,北京100013

出　　处：《石油化工》2024年第6期777-782,共6页Petrochemical Technology

摘　　要：制备了正丁烷氧化制顺酐的VPO催化剂,采用XRD和XPS对催化剂进行了表征,研究了造孔剂脱除对催化剂性能的影响,包括造孔剂含量、造孔剂脱除顺序以及低温减压脱除造孔剂对催化剂性能的影响,并考察了催化剂的稳定性。实验结果表明,降低造孔剂含量不能有效提升催化剂的性能;采用先脱除造孔剂后活化的方法制备VPO催化剂,在408℃熔盐温度下正丁烷转化率达到80.6%、顺酐收率可达94.3%(w),催化剂性能有所提升;采用低温减压的方法脱除造孔剂,VPO催化剂在408℃熔盐温度下正丁烷转化率达到82.5%、顺酐收率达到95.1%(w),可以显著提升催化剂的性能,且在反应50 d内正丁烷转化率维持在82.0%以上、顺酐收率稳定在94.0%(w)以上。VPO catalysts for n-butane oxidation to maleic anhydride(MA)were prepared and characterized by XRD and XPS.The effects of removing pore forming reagent on the performance of the VPO catalyst were investigated,including the content of the pore-forming agent,the sequence of removal,and low-temperature vacuum removal.The results show that reducing the content of pore forming reagent in the catalyst cannot improve the performance of the catalyst.A method involving the removal of the pore-forming agent followed by activation was found to improve the performance of the VPO catalyst,achieving an n-butane conversion of 80.6%and MA yield of 94.3%(w)at a molten salt temperature of 408℃.The low-temperature vacuum removing method was effective in improving the catalytic performance of the VPO catalyst.Under a molten salt temperature of 408℃,the n-butane conversion was maintained at 82.5%,and MA yield reached 95.1%(w).The performance and stability of the catalyst improved significantly.The catalyst demonstrated stability over 50 d reaction,with the n-butane conversion remaining above 82.0%and MA yield consistently above 94.0%(w).

关 键 词：造孔剂 VPO催化剂 正丁烷 顺酐 

分 类 号：TQ426.6[化学工程]