首页 > 88必威

以类水滑石为前体的Ni催化剂及其催化甲烷水蒸气重整制氢:催化活性和动力学(英文)

来源:论文学术网
时间:2024-08-18 18:05:16
热度:

以类水滑石为前体的Ni催化剂及其催化甲烷水蒸气重整制氢:催化活性和动力学(英文)【摘要】:Ni/Mg–Al catalysts derived from hydrotalcite-

【摘要】:Ni/Mg–Al catalysts derived from hydrotalcite-type precursors were prepared by a co-precipitation technique and applied to steam reforming of methane. By comparison with Ni/γ-Al2O3 and Ni/α-Al2O3 catalysts prepared by incipient wetness impregnation, the Ni/Mg–Al catalyst presented much higher activity as a result of higher specific surface area and better Ni dispersion. The Ni/Mg–Al catalyst with a Ni/Mg/Al molar ratio of 0.5:2.5:1 exhibited the highest activity for steam methane reforming and was selected for kinetic investigation. With external and internal diffusion limitations eliminated, kinetic experiments were carried out at atmospheric pressure and over a temperature range of 823–973 K. The results demonstrated that the overall conversion of CH4 and the conversion of CH4 to CO2were strongly influenced by reaction temperature, residence time of reactants as well as molar ratio of steam to methane. A classical Langmuir–Hinshelwood kinetic model proposed by Xu and Froment(1989)fitted the experimental data with excellent agreement. The estimated adsorption parameters were consistent thermodynamically. 【作者单位】: State
【关键词】Methane steam reforming Hydrogen Hydrotalcite Catalyst Kinetics
【基金】:Supported by the National Natural Science Foundation of China(21276076) the Program for New Century Excellent Talents in University(NCET-13-0801) the Fundamental Research Funds for the Central Universities(222201313011)
【分类号】:TQ116.2;O643.32
【正文快照】: r t i c l e i n f o a b s t r a c taArticle history:Received in revised form 27 October 2013Accepted 1 November 2013Available online 10 November 2014Ni/Mg–Al catalysts derived from hydrotalcite-type precursors were prepared by a co-precipitation techniq

您可以在本站搜索以下学术论文文献来了解更多相关内容

Kinetics of Carbon Deposition on Hexaaluminate LaNiAl_(11)O_(19) Catalyst During CO_2 Reforming of Methane    

Preparation and catalytic properties of ZrO_2-Al_2O_3 composite oxide supported nickel catalysts for methane reforming with carbon dioxide    

Hydrogen production from simulated hot coke oven gas by catalytic reforming over Ni/Mg(Al)O catalysts    

Steam reforming of ethanol over Ni/Ce_(0.7)Pr_(0.3)O_2 catalyst    王红;张丽娟;袁木朝子;徐婷玉;刘源;

Thermodynamic analysis of combined reforming process using Gibbs energy minimization method: In view of solid carbon formation    Behzad Nematollahi;Mehran Rezaei;Ebrahim Nemati Lay;Majid Khajenoori;

Effects of oxidation pretreatment temperature on Kovar used as CO_2 reforming catalyst    Sharon Rose de la Rama;Hiroshi Yamada;Tomohiko Tagawa;

Hydrogen production from steam reforming of ethanol over Ni/MgO-CeO_2 catalyst at low temperature    石秋杰;刘承伟;谌伟庆;

CH_4-CO_2 reforming to syngas over Pt-CeO_2-ZrO_2/MgO catalysts: Modification of support using ion exchange resin method    

Dry reforming reaction over nickel catalysts supported on nanocrystalline calcium aluminates with different CaO/Al_2O_3 ratios    Atiyeh Ranjbar;Mehran Rezaei;

Simultaneous operation of dibenzothiophene hydrodesulfurization and methanol reforming reactions over Pd promoted alumina based catalysts    Muhammad Yaseen;Muhammad Shakirullah;Imtiaz Ahmad;Ata Ur Rahman;Faiz Ur Rahman;Muhammad Usman;Rauf Razzaq;

Preparation of Sub-10nm Cored Ni@ZrO_2 yolk-shell structured catalysts and its sintering-resistant property in steam reforming of methane    Zi-Yian Lim;Chunzheng Wu;Chen Zhou;Hongfeng Yin;Kwang-Leong Choy;Wei Guo Wang;

NiAl layered double hydroxide-derived materials as the catalysts for methanol steam reforming    John C.Amphlett;Brant A.Peppley;

Coating powdered Copper Catalysts with Yttria Sol    C.Y.Lee;S.J.Lee;H.C Leu;葉君棣;

Photocatalytic and photoelectrochemical water splitting using metal oxide and sulfide materials    Akihiko Kudo;

Catalytic M_2O_3-doped Ceria Particles Synthesized for Fuel Reforming    Sung-En Lin;Ching-Hung Weng;

等离子体在催化反应中的应用    陶旭梅;刘改焕;齐凤伟;李代红;印永祥;

Baidu
map