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Dry reforming of methane over Ni/MgO-Al2O3 catalysts prepared by two-step hydrothermal method

机译：两步水热法制备的Ni / MgO-Al2O3催化剂上的甲烷干重整

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摘要

Carbon dioxide reforming of methane has been investigated on a series of Ni/MgO-Al2O3 catalysts prepared by a simple two-step hydrothermal method. The sheet-like Ni/MgO-Al2O3 (15%) catalyst afforded as high as 52% CH4 conversion, which is almost six times higher than that of original Ni/MgO catalyst, with excellent stability during reaction, at relatively higher space velocity (6 x 10(5) cm(3).g cat(-1).H-1) and lower reaction temperature (923 K). The effects of different ratio of Mg and Al have been investigated to understand the catalytic activity and coke formation for the obtained catalysts. The characterization results show that the addition Al2O3 to MgO would contribute to forming MgAl2O4 phase, which is stable and could effectively increase the CO2 adsorption due to the increased basic sites on the surface of catalyst, contributing to higher catalytic activity and better stability of this kind of catalyst during the dry reforming reaction. The catalysts were characterized by different techniques, such as BET, H-2-TPR, XRD, SEM, CO2-TPD, TG-DTA and TEM analysis. (C) 2016 Elsevier B.V. All rights reserved.
机译：已经对通过简单的两步水热法制备的一系列Ni / MgO-Al2O3催化剂研究了甲烷的二氧化碳重整。片状Ni / MgO-Al2O3（15％）催化剂可提供高达52％的CH4转化率，几乎是原始Ni / MgO催化剂的六倍，并且在相对较高的空速下具有出色的反应稳定性（ 6 x 10（5）cm（3）.g cat（-1）.H-1）和较低的反应温度（923 K）。已经研究了不同比例的Mg和Al的影响以了解所获得的催化剂的催化活性和焦炭形成。表征结果表明，向MgO中添加Al2O3有助于形成MgAl2O4相，该相稳定并由于催化剂表面碱性位的增加而有效地增加了CO2的吸附，有助于提高此类催化剂的催化活性和稳定性。在干重整反应中的催化剂。催化剂采用不同的技术进行表征，例如BET，H-2-TPR，XRD，SEM，CO2-TPD，TG-DTA和TEM分析。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2016年第15期|25-33|共9页
  • 作者

    Zhang Lin; Zhang Qian; Liu Yi; Zhang Yi;

  • 作者单位

    Beijing Univ Chem Technol, Res Ctr, State Key Lab Organ Inorgan Composites, Minist Educ High Grav Engn & Technol, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Res Ctr, State Key Lab Organ Inorgan Composites, Minist Educ High Grav Engn & Technol, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Res Ctr, State Key Lab Organ Inorgan Composites, Minist Educ High Grav Engn & Technol, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Res Ctr, State Key Lab Organ Inorgan Composites, Minist Educ High Grav Engn & Technol, Beijing 100029, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Dry reforming of methane; Nickel; Al2O3; MgO; Hydrothermal;

    机译：甲烷;镍;Al2O3;MgO;水热;重整;

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