摘要
以正硅酸四乙酯和二乙烯三氨基丙基三甲氧基硅烷(N3-)为原料,通过溶胶凝胶法合成N3-SiO_(2),进而通过选择配位法合成Pd/N3-SiO_(2)催化剂,并采用配体修饰Pd/N3-SiO_(2)催化剂,研究配体修饰的Pd/N3-SiO_(2)催化剂乙炔气相选择加氢性能.采用UV-Vis、IR、BET对催化剂的结构进行表征.结果表明:配体加入可以提高催化剂乙炔选择加氢合成乙烯性能,其中采用正十二硫醇修饰的HSC12-Pd/N3-SiO_(2)催化剂乙炔转化率达99%,乙烯选择性达93%,表征结果表明硫醇与Pd作用可以提高其选择加氢生成乙烯性能.
N3-SiO_(2) was prepared by tetraethylorthosilicate and diethylenetriaminopropyltrimetho-xysilane using sol-gel method,and then Pd/N3-SiO_(2) catalysts were synthesized by the selective coordination method. The ligand modified Pd/N3-SiO_(2) catalyst was used to study the gas-phase selective hydrogenation of acetylene modified by ligand modified Pd/N3-SiO_(2) catalyst. The structure of the catalysts were characterized with UV-Vis、IR and BET. The results show that the addition of ligands can improve the performance of the catalyst for selective hydrogenation of acetylene to ethylene. The n-dodecyl mercaptan modified HSC12-Pd/N3-SiO_(2) catalyst has 99 % acetylene coversion and 93 % ethylene selectivity. The characterization results show that the interaction of mercaptan and Pd can improve the performance of the catalyst for selective hydrogenation of acetylene to ethylene.
作者
王梦娇
王康军
李东楠
WANG Meng-jiao;WANG Kang-jun;LI Dong-nan(Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《沈阳化工大学学报》
CAS
2020年第4期319-323,共5页
Journal of Shenyang University of Chemical Technology
