国产航空煤油裂解催化剂Pt/ZrxTixAl1-2xO2的性能

采用共沉淀法制备了一系列ZrxTixAl1-2O2复合氧化物载体材料,考察了其作为裂解催化剂载体对航空煤油裂解反应的影响.采用全自动吸附仪、X射线衍射、扫描电镜/能谱仪联用、NH3-程序升温脱附等手段对催化剂进行了表征.结果表明,当ZrO2:TiO2:Al2O3质量比为1:1:3时催化剂具有最大的比表面积和孔容;具有最强的表面酸性和最集中的强酸中心密度,且具有良好的再生功能.实验结果表明,载体ZrO2:TiO2:Al2O3质量比为1:1:3时催化剂上650℃裂解产气量较热裂解提高了2.1倍,700℃时提高1.4倍.另外,该系列载体材料经1000℃焙烧5h后,所制得的催化剂几乎失去了催化活性....

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Published in催化学报 Vol. 35; no. 2; pp. 175 - 184
Main Author 焦毅 王健礼 朱权 李象远 陈耀强
Format Journal Article
LanguageChinese
Published 四川大学化学学院,绿色化学与技术教育部重点实验室,四川成都610064%四川大学化工学院,四川成都,610064 2014
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ISSN0253-9837
1872-2067
DOI10.1016/S1872-2067(12)60732-2

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Summary:采用共沉淀法制备了一系列ZrxTixAl1-2O2复合氧化物载体材料,考察了其作为裂解催化剂载体对航空煤油裂解反应的影响.采用全自动吸附仪、X射线衍射、扫描电镜/能谱仪联用、NH3-程序升温脱附等手段对催化剂进行了表征.结果表明,当ZrO2:TiO2:Al2O3质量比为1:1:3时催化剂具有最大的比表面积和孔容;具有最强的表面酸性和最集中的强酸中心密度,且具有良好的再生功能.实验结果表明,载体ZrO2:TiO2:Al2O3质量比为1:1:3时催化剂上650℃裂解产气量较热裂解提高了2.1倍,700℃时提高1.4倍.另外,该系列载体材料经1000℃焙烧5h后,所制得的催化剂几乎失去了催化活性.
Bibliography:Yi Jiao , Jianli Wang , Quan Zhu , Xiangyuan Li , Yaoqiang Chen (1. Key Laboratory of Green Chemistry and Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan China b College of Chemical Engineering, Sichuan University, Chengdu 610064, Sichuan, China)
ZrxTixAl1-2xO2 composite oxidesPipe coatingCatalytic crackingEndothermic fuelAcidity
ZrxTixAl1-2xO2 composite oxides for use as supports were prepared by coprecipitation and assessed with regard to their catalytic performance during the kerosene cracking reaction. The catalysts were characterized by N2 adsorption-desorption, scanning electron microscopy-energy dispersive spectrometry, X-ray diffraction, and temperature-programmed desorption (NH3-TPD). The results showed that a support composed of ZrO2:TiO2:Al2O3 in the ratio of 1:1:3 exhibited the highest surface area and pore volume, and had the strongest surface acidity and highest acidic density. Energy dispersive spectroscopy results showed that catalysts f
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(12)60732-2