掺杂离子的种类对介孔La0.6A0.4NiO3钙钛矿催化剂的结构与催化活性的影响

doi:10.16085/j.issn.1000-6613.2016.11.024

化工进展 ›› 2016, Vol. 35 ›› Issue (11): 3542-3548.DOI: 10.16085/j.issn.1000-6613.2016.11.024

掺杂离子的种类对介孔La_0.6A_0.4NiO₃钙钛矿催化剂的结构与催化活性的影响

张晓华^1,2, 李凝¹, 滕俊江¹, 张荣斌²

1. 广东石油化工学院, 广东茂名 525000;
2. 南昌大学化学学院, 江西南昌 330031

收稿日期:2016-03-09 修回日期:2016-05-03 出版日期:2016-11-05 发布日期:2016-11-05
通讯作者: 李凝,教授,博士,研究方向为催化材料与多相催化。E-mail:985882939@qq.com。
作者简介:张晓华(1990-)男,硕士研究生,研究方向为生物质能源化工与催化。
基金资助:
广东省人才引进项目（粤财教[2013]247号）及广东石油化工学院人才引进项目。

Structure and catalytic activity of mesoporous La_0.6A_0.4NiO₃ perovskite catalyst with A-site ions replaced

ZHANG Xiaohua^1,2, LI Ning¹, TENG Junjiang¹, ZHANG Rongbin²

1. Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China;
2. Department of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China

Received:2016-03-09 Revised:2016-05-03 Online:2016-11-05 Published:2016-11-05

摘要/Abstract

摘要： 以十六烷基三甲基溴化铵（CTAB）为模板剂，用共沉淀法分别制备了介孔La_0.6A_0.4NiO₃（A=Ce、Sr、Y、Nd、Pr）钙钛矿复合氧化物，用XRD、SEM、FTIR、BET和程序升温技术等对复合氧化物的晶相结构、表面形貌、表面积、孔径分布及表面性能等进行了表征，同时在蔗渣高压液化反应中探讨了A位离子掺杂种类对介孔La_0.6A_0.4NiO₃催化活性和液化产物分布及液化油含量的影响。结果表明，掺杂的A位离子均能进行不同程度的同晶取代，其中掺杂的Pr³⁺能较好的与La³⁺发生同晶取代，且具有较大的比表面积和孔径分布，表面存在较强的氧物种传导性和碱性中心，在蔗渣高压液化反应中具有较高的液化油产率和较低的残渣率，生物质油的主要成分为乙酰柠檬酸三丁酯、柠檬酸三正丁酯、对乙基苯酚、6-乙基-3-肽酸酯，有利于提高油品的质量。

关键词: 共沉淀法, A位掺杂, 介孔钙钛矿, 蔗渣液化

Abstract: Using cationic surfactant CTAB as organic template agent, mesoporous La_0.6A_0.4NiO₃ (A=Ce、Sr、Y、Nd、Pr) perovskite-type oxides were synthesized by co-precipitation method, and the crystalline structures, surface topography, superficial area, pore size distribution and surface properties were characterized by XRD, SEM, FTIR, BET and temperature-programmed technology, respectively. At the same time, the catalytic performances, liquefaction product distributions and liquefied oil production of mesoporous La_0.6A_0.4NiO₃ perovskite with A-site ions replaced and were studied. The results showed that the A-site ions could dope with different degrees of crystal, and Pr³⁺could better replace La³⁺ by isomorphous substitution, and La_0.6Pr_0.4NiO₃ perovskite had larger specific surface area and pore size distribution and stronger surface conductivity and oxygen species alkaline center, therefore it possessed high yield of liquefied oil and low rate of residue on bagasse high-pressure liquefaction reaction, and the main components of bio-oil products were acetyl citric acid three butyl ester、tributyl citrate、ethyl phenol、6-ethyl-3-peptide ester, with improved product quality.

Key words: co-precipitation method, A-site doping, mesoporous perovskite, bagasse liquefaction

中图分类号:

张晓华, 李凝, 滕俊江, 张荣斌. 掺杂离子的种类对介孔La_0.6A_0.4NiO₃钙钛矿催化剂的结构与催化活性的影响[J]. 化工进展, 2016, 35(11): 3542-3548.

ZHANG Xiaohua, LI Ning, TENG Junjiang, ZHANG Rongbin. Structure and catalytic activity of mesoporous La_0.6A_0.4NiO₃ perovskite catalyst with A-site ions replaced[J]. Chemical Industry and Engineering Progress, 2016, 35(11): 3542-3548.

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掺杂离子的种类对介孔La_0.6A_0.4NiO₃钙钛矿催化剂的结构与催化活性的影响

Structure and catalytic activity of mesoporous La_0.6A_0.4NiO₃ perovskite catalyst with A-site ions replaced

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