Mechanism of ammoxidation of propane on a Sb/V/O system

被引:25
作者
Albonetti, S [1 ]
Blanchard, G [1 ]
Burattin, P [1 ]
Cassidy, TJ [1 ]
Masetti, S [1 ]
Trifiro, F [1 ]
机构
[1] RHONE POULENC CHIM, F-93308 AUBERVILLIERS, FRANCE
关键词
mechanism; acrylonitrile; oxidation products; ammonia; oxygen;
D O I
10.1023/A:1019082621354
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The mechanism of the direct ammoxidation of propane is investigated on a Sb/V mixed oxide catalyst (atomic ratio 5/1) in order to understand the sequence of the intermediates and the role of ammonia in the formation of acrylonitrile. The sample was characterized by different techniques (BET, FTIR, XRD and XPS) and tested in different conditions (oxidation and ammoxidation of propane and propene). It is proposed that propane is first converted to propene and hence to ''oxidation products'' (which could be acrolein or an intermediate absorbed an the catalyst surface, as allyl radical). In the absence of ammonia these ''oxidation products'' are converted to carbon oxide. But in its presence they are converted into acrylonitrile, which is appreciably more stable and undergoes minor degrees of oxidative degradation.
引用
收藏
页码:119 / 123
页数:5
相关论文
共 9 条
  • [1] ANDERSSON A, 1993, STUD SURF SCI CATAL, V75, P691
  • [2] BUCHHOLZ SA, 1996, AM CHEM SOC DIV PETR, V41, P210
  • [3] KINETICS AND REACTION NETWORK IN PROPANE AMMOXIDATION TO ACRYLONITRILE ON V-SB-AL BASED MIXED OXIDES
    CATANI, R
    CENTI, G
    TRIFIRO, F
    GRASSELLI, RK
    [J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1992, 31 (01) : 107 - 119
  • [4] FUNCTIONALIZATION OF ALKANES BY HETEROGENEOUS VAPOR-PHASE OXIDATION .2. PROPANE AMMOXIDATION
    CENTI, G
    PESHEVA, D
    TRIFIRO, F
    [J]. APPLIED CATALYSIS, 1987, 33 (02): : 343 - 359
  • [5] CENTI G, 1990, STUD SURF SCI CATAL, V55, P515
  • [6] CENTI G, 1990, CHIM IND-MILAN, V72, P617
  • [7] AMMOXIDATION OF PROPANE OVER ANTIMONY VANADIUM-OXIDE CATALYSTS
    NILSSON, R
    LINDBLAD, T
    ANDERSSON, A
    [J]. JOURNAL OF CATALYSIS, 1994, 148 (02) : 501 - 513
  • [8] AMMOXIDATION OF PROPENE OVER ANTIMONY-VANADIUM-OXIDE CATALYSTS
    NILSSON, R
    LINDBLAD, T
    ANDERSSON, A
    [J]. CATALYSIS LETTERS, 1994, 29 (3-4) : 409 - 420
  • [9] NILSSON R, 1994, STUD SURF SCI CATAL, V82, P293