n-heptane reforming over Pt supported on beta zeolite exchanged with Cs and Li cations

被引：7
|
作者：
Ramírez, S
Viniegra, M
Domínguez, JM
Schacht, P
De Ménorval, LC
机构：
[1] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico
[2] Inst Mexicano Petr, STI, Programa Simulac Mol, Mexico City 07730, DF, Mexico
[3] Inst Mexicano Petr, Gerencia Catalizadores, Mexico City 07730, DF, Mexico
[4] ENSCM, Lab Mat Catalyt & Catalyse Chim Organ, CNRS, UMR 5618, F-34296 Montpellier 05, France
来源：
CATALYSIS LETTERS | 2000年 / 66卷 / 1-2期
关键词：
Pt; beta zeolite; ion exchange; n-heptane reforming;
D O I：
10.1023/A:1019058430711
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 physicochemical and catalytic properties of platinum supported on beta zeolite both acid and exchanged with Cs and Li cations were characterized by X-ray diffraction, NH3-TPD, FTIR of adsorbed pyridine and CO, DSC, mass spectrometry and hydrogen chemisorption. The n-heptane conversion was performed to assess the selectivity variations in the exchanged solids. A high metal dispersion was verified in all of the catalysts, varying from 54 up to 81%. The FTIR of adsorbed CO revealed a shift towards lower frequencies for Pt on exchanged zeolite with respect to Pt on the acid zeolite, indicating that the basic character of Cs and Li enhance the electron donation from the support to the metal. The acid-base properties of the exchanged materials influence their selectivity for the catalytic conversion of n-heptane at 663 K and 1 atm, showing that Cs promotes the aromatization reactions while Li promotes isomerization and cracking. The cracking activity followed the acid/metal ratio for all of the catalysts studied.
引用
收藏
页码：25 / 32
页数：8
相关论文
共 50 条
  • [21] Catalytic Reforming of n-Heptane on Platinum-Palladium Supported on γ-Alumina
    Vadi, Mehdi
    Hosseinzade, Ali
    ASIAN JOURNAL OF CHEMISTRY, 2010, 22 (09) : 6640 - 6646
  • [22] Catalytic performances of dealuminated Hβ zeolite supported Pt catalysts doped with Cr in hydroisomerization of n-heptane
    Liu, Ping
    Wang, Jun
    Zhang, Xingguang
    Wei, Ruiping
    Ren, Xiaoqian
    CHEMICAL ENGINEERING JOURNAL, 2009, 148 (01) : 184 - 190
  • [23] TRANSFORMATIONS OF N-HEPTANE OVER PT ACTIVATED CARBON CATALYSTS
    RODRIGUEZRAMOS, I
    GUERRERORUIZ, A
    APPLIED CATALYSIS A-GENERAL, 1994, 119 (02) : 271 - 278
  • [24] Controllable deposition of Pt nanoparticles into a KL zeolite by atomic layer deposition for highly efficient reforming of n-heptane to aromatics
    Xu, Dan
    Wu, Baoshan
    Ren, Pengju
    Wang, Shuyuan
    Huo, Chunfang
    Zhang, Bin
    Guo, Wenping
    Huang, Lihua
    Wen, Xiaodong
    Qin, Yong
    Yang, Yong
    Li, Yongwang
    CATALYSIS SCIENCE & TECHNOLOGY, 2017, 7 (06) : 1342 - 1350
  • [25] In situ infrared study of n-heptane isomerization over Pt/H-beta zeolites
    Kondo, Junko N.
    Yang, Shuwu
    Zhu, Qingjun
    Inagaki, Satoshi
    Domen, Kazunari
    JOURNAL OF CATALYSIS, 2007, 248 (01) : 53 - 59
  • [26] N-HEPTANE ISOMERIZATION OVER Pt/TUNGSTATED ZIRCONIA CATALYSTS
    Montoya de la Fuente, J. A.
    Hernandez-Pichardo, M. L.
    del Angel, P., V
    REVISTA MEXICANA DE INGENIERIA QUIMICA, 2012, 11 (03): : 439 - 445
  • [27] REACTIONS OF MIXTURES OF LIGHT ALKENES AND N-HEPTANE OVER USHY ZEOLITE
    PINHEIRO, CI
    LEMOS, F
    RIBEIRO, FR
    GUISNET, M
    APPLIED CATALYSIS A-GENERAL, 1994, 108 (02) : 107 - 114
  • [28] HYDROCONVERSION OF N-HEPTANE OVER DEALUMINATED ZEOLITE OMEGA-CATALYSTS
    COQ, B
    RAJAOFANOVA, V
    CHAUVIN, B
    FIGUERAS, F
    APPLIED CATALYSIS, 1991, 69 (02): : 341 - 349
  • [29] Synthesis and Characterization of Chromium-Added Pt/Beta Zeolite and its Catalytic Performance for n-Heptane Isomerization
    Izutsu, Yoshiyuki
    Oku, Yuki
    Hidaka, Yusuke
    Yoshida, Kaname
    Sasaki, Yukichi
    Sekine, Yasushi
    Kikuchi, Eiichi
    Matsukata, Masahiko
    CATALYSIS LETTERS, 2013, 143 (05) : 486 - 494
  • [30] Comparison of the effects of nitrogen poisoning on molybdenum oxycarbide and Pt/beta-zeolite catalysts in the isomerization of n-heptane
    delGallo, P
    PhamHuu, C
    York, PE
    Ledoux, MJ
    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1996, 35 (10) : 3302 - 3310
12345