CO_(2)气氛下SiO_(2)改性TiO_(2)催化乙苯脱氢工艺研究  

Dehydrogenation of ethylbenzene over SiO_(2) modified TiO_(2) catalyst in CO_(2)

作　　者：回梁川 刘思乐 田园 李婉婷 卜义夫 Hui Liangchuan;Liu Sile;Tianyuan;Li Wanting;Bu Yifu(Department of Chemistry and Chemical Engineering,Shenyang Institute of Science and Technology,Shenyang110167,Liaoning,China;Zhejiang Qinyan Technology Co.,Ltd.,Shaoxing 312000,Zhejiang,China)

机构地区：[1]沈阳科技学院化学与化工系,辽宁沈阳110167 [2]浙江秦燕科技股份有限公司,浙江绍兴312000

出　　处：《工业催化》2024年第4期61-66,共6页Industrial Catalysis

基　　金：2023年沈阳科技学院创新创业孵化扶持项目;国家级大学生创新训练项目(2023213621002)。

摘　　要：采用溶胶-凝胶法制备TiO_(2)-SiO_(2)催化剂,研究SiO_(2)负载量对TiO_(2)-SiO_(2)催化剂活性、稳定性的影响。考察反应温度、乙苯空速及催化剂粒径对乙苯脱氢制苯乙烯工艺的影响,并对催化剂进行BET及SEM表征。结果表明,TiO_(2)-SiO_(2)催化剂对乙苯脱氢制苯乙烯有较好的活性,当SiO_(2)的负载质量分数为20%时,乙苯转化率和苯乙烯选择性显著提高。SEM证明当SiO_(2)负载质量分数为20%时,TiO_(2)-SiO_(2)催化剂表面较光滑,颗粒细小且分布均匀,并呈现疏松多孔状结构。TiO_(2)-SiO_(2) catalysts were prepared by the sol-gel method,and the effect of SiO_(2) loading on activity and stability of the TiO_(2)-SiO_(2) catalyst was studied.The effects of reaction temperature,ethylbenzene space velocity,and catalyst particle size on ethylbenzene dehydrogenation to styrene were investigated.The catalysts were characterized by BET and SEM.The results show that the TiO_(2)-SiO_(2) catalyst has a good activity for the dehydrogenation of ethylbenzene to styrene;When the SiO_(2) loading was mass fraction of 20%,the conversion of ethylbenzene and the selectivity of styrene were significantly improved.SEM proved that the surface of the TiO_(2)-SiO_(2) catalyst with SiO_(2) loading was 20%was smooth,the particles were fine and uniformly distributed,and the structure was loose and porous.

关 键 词：有机化学工程 二氧化碳 乙苯 苯乙烯 二氧化硅 二氧化钛 

分 类 号：TQ426.6[化学工程] TQ241.21