添加剂对共沉淀法制备的VPO催化剂的影响

华南理工大学学报(自然科学版) ›› 2004, Vol. 32 ›› Issue (1): 49-55,64.

添加剂对共沉淀法制备的VPO催化剂的影响

叶代启¹ 付名利¹ 梁红² 程胜中¹ 荣铁志¹ 庞先燊¹

1．华南理工大学环境科学与工程系广东广州510640；2．广州大学轻化工程系广东广州510091

收稿日期:2003-04-07 出版日期:2004-01-20 发布日期:2015-09-07
通信作者: 叶代启（1965－）男副教授主要从事空气污染控制技术的研究． E-mail:cedqye＠scut.edu.cn
作者简介:叶代启（1965－）男副教授主要从事空气污染控制技术的研究．
基金资助:
国家自然科学基金资助项目（29100028）；广东省自然科学基金资助项目（920111）；广东省重大科技项目（2KB06601S）

Influence of Additives on Various VPO Catalysts Prepared by Coprecipitation Process

Ye Dai-qi¹ FuMing-li¹ Liang Hong²Cheng Sheng-zhong¹Rong Tie-zhi¹ Pang Xian-shen ¹

1．Dept．of Environmental Science and EngineeringSouth China Univ．of Tech．Guangzhou510640GuangdongChina；
2．Dept．of Light Chemical EngineeringGuangzhou Univ．Guangzhou510091GuangdongChina

Received:2003-04-07 Online:2004-01-20 Published:2015-09-07
Contact: Ye Dai-qi（born in1965）maleassociate professormainly researches on air pollution control technology． E-mail:cedqye＠scut.edu.cn
About author:Ye Dai-qi（born in1965）maleassociate professormainly researches on air pollution control technology．
Supported by:
Supported by the National Natural Science Foundation of China （29100028）Guangdong Provincial Natural Science Foundation （920111） and Guangdong Provincial Key Scientific and Technological Project （2KB06601S）

摘要/Abstract

摘要： 研究了添加剂对用于选择性氧化正丁烷为顺丁烯二酸酐的 VPO 催化剂的结构和性能的影响．催化剂采用共沉淀法制备添加元素为ZrCoCeZnSnKBa 和Bi 等．催化剂性能测试在固定床微反应器内于常压下进行．结果表明添加剂对催化剂性能有很大的影响．各种组分对正丁烷氧化的促活顺序为：VPO-Zr＞VPO-Co＞VPO-Zn＞VPO-Sn＞VPO-Bi＞VPO-Ce＞VPO-Ba＞VPO-K＞VPO而对正丁烷氧化为顺丁烯的选择性促活顺序为：VPO-Zr＞VPO-Ce＞VPO-Zn＞VPO-Sn＞VPO-Co＞VPO-Bi＞VPO＞VPO-Ba＞VPO-K．XRDFTIR 和 TGA／DTG 测试结果表明添加剂的加入并未使活化前后催化剂的本体结构发生明显改变．所有VPO 催化剂前体均主要含VOPO_4.0.5H₂O而活化后的催化剂主要含有（VO）₂P₂O₇和少量α-VOPO_4.XPS 测试证实催化剂表面有 PV 和 O 等元素富集的现象而且表面氧物种数与催化剂活性直接相关．

关键词: VPO 催化剂, 添加剂, 正丁烷, 顺丁烯二酸酐, 表面氧物种

Abstract: The effect of additives on the structures and properties of various VPO catalysts used for the select tive oxidation of n-butane to maleic anhydride was investigated．A series of VPO catalysts were prepared by coprecipitation process with the addition of ZrCoCeZnSnKBa and Bi as promoters．The catalytic performance test was conducted in a fixed-bed micro-reactor at atmospheric pressure．The results show that the catalytic behavior is affected remarkably by additives．For n-butane oxidation activitythe effect of various elements follows the order of VPO-Zr＞VPO-Co＞VPO-Zn＞VPO-Sn＞VPO-Bi＞VPO-Ce＞VPO-Ba＞VPO-K＞VPO．For MA （Maleic Anhydride） selectivitythe promoting effect is in the order of VPO-Zr＞VPO-Ce＞VPO-Zn＞VPO-Sn＞VPO-Co＞VPO-Bi＞VPO＞VPO-Ba＞VPO-K．Test results of catalysts including XRDFTIR and TGA／DTG indicate that no remarkable change occurs in the bulk structure due to the addition of elementsboth for precursor and final catalysts．All precursor catalysts are composed of VOPO_4.0.5H₂Owhile in the final samples（VO）₂P₂O₇is formed accompanied by less amounts of α-VOPO_4.XPS measurement suggests the enrichment of PV and O on the surface of catalystsand the amount of surface oxygen species is directly related to the catalyst activity．

Key words: vanadyl pyrophosphate catalyst, additive, n-butane oxidation, maleic anhydride, surface oxygen species

中图分类号:

TQ032.41

叶代启, 付名利, 梁红, 等. 添加剂对共沉淀法制备的VPO催化剂的影响[J]. 华南理工大学学报(自然科学版), 2004, 32(1): 49-55,64.

Ye Dai-qi, Fu Ming-li, Liang Hong, et al. Influence of Additives on Various VPO Catalysts Prepared by Coprecipitation Process[J]. Journal of South China University of Technology(Natural Science Edition), 2004, 32(1): 49-55,64.

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