[1]何杰,严爱珍.工业用间二甲苯氨氧化催化剂的表面吸附特征研究[J].东南大学学报(自然科学版),2002,32(2):276-278.[doi:10.3969/j.issn.1001-0505.2002.02.029]
 He Jie,Yan Aizhen.Adsorption characteristics of catalysts used for ammoxidation of m-xylene to isophthalonitrile[J].Journal of Southeast University (Natural Science Edition),2002,32(2):276-278.[doi:10.3969/j.issn.1001-0505.2002.02.029]
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工业用间二甲苯氨氧化催化剂的表面吸附特征研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
32
期数:
2002年第2期
页码:
276-278
栏目:
化学化工
出版日期:
2002-03-20

文章信息/Info

Title:
Adsorption characteristics of catalysts used for ammoxidation of m-xylene to isophthalonitrile
作者:
何杰1严爱珍2
1 淮南工业学院化工系,淮南 232001; 2 南京大学化学系, 南京 210093
Author(s):
He Jie1 Yan Aizhen2
1 Department of Chemical Engineering, Huainan Institute of Technology, Huainan 232001, China
2 Department of Chemistry, Nanjing University, Nanjing 210093, China
关键词:
间二甲苯 氨氧化催化剂 吸附特征 NH3-TPD
Keywords:
m-xylene ammoxidation catalyst adsorption characteristics NH3-TPD
分类号:
O647.32;TQ426.94
DOI:
10.3969/j.issn.1001-0505.2002.02.029
摘要:
采用低温N2吸附及H2O,C6H6m-C6H4(CH3)2等探针分子静态吸附以及NH3-TPD等方法考察了工业用间二甲苯氨氧化生产间苯二甲腈催化剂VCB1,VCB2和VCM表面吸附特征.结果表明,VCB1,VCB2和VCM催化剂均具有中孔(15~40 nm)结构,反应物分子在孔道中的扩散不构成吸附过程的控制步骤,催化剂对反应组分的吸附能力取决于催化剂表面亲合力.VCM对m-C6H4(CH3)2亲合力较强,其表面对H2O和NH3的亲合力弱是该催化剂在使用过程中深度氧化产物较多的可能原因之一.结果为催化剂改性提供了理论依据.
Abstract:
VCB1, VCB2 and VCM are catalysts used in industry for producing isophthalonitrile through ammoxidation of m-xylene. Their surface characteristics were investigated by means of adsorption of probe molecules such as water, benzene, and m-xylene etc.as well as temperature programmed desorption of ammonia(NH3-TPD). The results reveal that the pore structure of three catalysts all possess mesopore between 15-40 nm. Therefore, the diffusion of reaction molecules in the catalyst channels does not act as a control factor to adsorption processes while the surface affinity to adsorbed molecules are so important that it influences the adsorbing behavior of catalysts and reaction selectivity, That provides the theoretical foundation for the catalysts modification.

参考文献/References:

[1] Grasslli R K.Advances and future trends in selective oxidation and ammoxidation catalysis[J].Catal Today,1999,49(2):141-153.
[2] 陈金华,顾建良,顾龙勤.用NC-Ⅲ型催化剂合成间苯二甲腈[J].石油化工,1999,28(12):812-815.
  Chen Jinhua,Gu Jianliang,Gu Longqin.Synthesis of isophthalonitrile over NC-Ⅲ catalyst[J].Petrochemical Technology,1999,28(12):812-815.(in Chinese)
[3] 郑穹,黄弛,许崇文,等.间二甲苯氨氧化制间苯二甲腈催化剂研究[J].武汉大学学报(自然科学版),1999,45(6):821-824.
  Zheng Qiong,Huang Chi,Xu Chongwen,et al.Research on catalyst to produce isophthalonitrile by ammoxidation of m-xylene[J].J Wuhan Univ(Nat Sci Ed),1999,45(6):821-824.(in Chinese)
[4] Martin A,Lucke B.Ammoxidation and oxidation of substituted methyl aromatics on vanadium-containing catalysts[J].Catal Today,2000,57(1-2):61-70.
[5] Rizayev R G,Mamedov E A,Vislovskii V P,et al.Some fundamental and practical aspect of the ammoxidation of alkybenzenes[J].Appl Catal A General,1992,83(2):103-140.
[6] 沈师庆,闵恩泽.烃类晶格氧选择氧化[J].化学进展,1998(2):137-145.
  Shen Shiqing,Min Enze.Selective oxidation of hydrocarbons using lattice oxygen of catalyst as oxidant[J].Progress in Chemistry,1998(2):137-145.(in Chinese)
[7] Zanthoff H W,Buchholz S A,Ovsitser O Y.Ammoxidation of propane to acrylonitrile on V-Sb-O catalysts — role of ammonia in the reaction pathways[J].Catal Today,1996,32(1-4):291-296.

备注/Memo

备注/Memo:
作者简介: 何杰(1962—),男,副教授,jhe@.aust.edu.cn.
更新日期/Last Update: 2002-03-20