Co修饰碳纳米管促进的Cu-ZrO2催化剂上CO2加氢制甲醇

被引：5

作者：

李辉

马春辉

林国栋

张鸿斌

机构：

[1] 厦门大学化学化工学院化学系固体表面物理化学国家重点实验室醇醚酯化工清洁生产国家工程实验室

来源：

厦门大学学报(自然科学版) | 2008年 / 06期

关键词：

Co修饰多壁碳纳米管基复合材料; CuiZrj-x%(y%Co/CNT)催化剂; CO2加氢; 甲醇合成;

D O I：

暂无

中图分类号：

TQ223.121 [];

学科分类号：

0817 ;

摘要：

利用微波助多元醇化学还原沉积法,制备一类Co修饰的多壁碳纳米管(CNT)基复合材料(y%Co/CNT),进而用其作为添加剂,制备共沉淀型y%Co/CNT促进的Cu-ZrO2催化剂,CuiZrj-x%(y%Co/CNT).Co对CNT的修饰明显地提高了该催化剂对CO2加氢制甲醇的催化活性.在Cu1Zr1-10%(4.3%Co/CNT)催化剂上,5.0 MPa,513 K,V(H2)/V(CO2)/V(N2)=69/23/8,GHSV=8 000 mL/(h.g)的反应条件下,CO2加氢的转化频率(TOF,即单位时间(s)内在单个表面活性金属Cu0位上CO2加氢转化的分子数)达2.89×10-3s-1,是相同条件下非促进的原基质Cu1Zr1和单纯CNT促进的对应物Cu1Zr1-10%CNT上这个值(2.36×10-3s-1和2.40×10-3s-1)分别的1.22和1.20倍;在CO2加氢产物中甲醇的C-基选择性为～92%,时空产率达176 mg/(h.g-cat.).催化剂的表征研究显示,Co修饰CNT促进的催化剂对H2优良的吸附活化性能对CO2加氢转化频率(TOF)的显著提高起着重要作用.

引用

页码：765 / 771

页数：7

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