本文選題：苯 + 加氫�。� 參考：《化工進(jìn)展》2017年08期

【摘要】：用共沉淀法分別在5%NaOH溶液、蒸餾水、0.035mol/L ZnSO_4溶液和0.145mol/L ZnSO_4溶液中用H_2還原制備了Ru-Zn(5%NaOH)催化劑、Ru-Zn(H_2O)催化劑、Ru-Zn(0.035mol/L ZnSO_4)催化劑和Ru-Zn(0.145mol/L ZnSO_4)催化劑。結(jié)果表明,它們催化苯選擇加氫制環(huán)己烯的活性高低順序?yàn)镽u-Zn(5%NaOH)催化劑Ru-Zn(H_2O)催化劑Ru-Zn(0.035mol/L ZnSO_4)催化劑≈Ru-Zn(0.145mol/L ZnSO_4)催化劑,環(huán)己烯選擇性高低順序與活性順序正好相反。因?yàn)檫�原介質(zhì)可以影響Ru-Zn催化劑的組成和織構(gòu)性質(zhì),進(jìn)而影響它的催化性能。Ru-Zn(H_2O)催化劑的環(huán)己烯收率最高,說明蒸餾水作還原介質(zhì)最好。隨還原溫度升高,Ru-Zn(H_2O)催化劑比表面積逐漸減小,催化劑活性逐漸降低。同時(shí)粒徑逐漸增大,Ru粒子上有利于環(huán)己烯加氫生成環(huán)己烷的楞位和頂點(diǎn)位減少,環(huán)己烯選擇性升高。在100℃還原溫度下制備的Ru-Zn(H_2O)催化劑的環(huán)己烯收率可達(dá)58.1%。
[Abstract]:Ru-ZnN ~ (5 +) H _ 2O) catalyst Ru-ZnN _ 2O _ (0.035 mol / L ZnSO4) and Ru-Zn(0.145mol/L ZnSO _ (4) were prepared by co-precipitation method in 5%NaOH solution, distilled water (0.035 mol / L ZnSO_4) solution and 0.145mol/L ZnSO_4 solution by H _ (2) reduction. The results show that the order of their catalytic activity for selective hydrogenation of benzene to cyclohexene is Ru-ZnN _ 5NaOH) catalyst Ru-ZnN _ H _ 2O) catalyst Ru-Zn(0.035mol/L _ ZnSO _ 4)) catalyst 鈮，

本文編號(hào)：1783193