A novel Ni–Mg–Al-LDHs/γ-Al2O3 Catalyst Prepared by in-situ synthesis method for CO2 reforming of CH4
A novel Ni–Mg–Al-LDHs/γ-Al2O3 Catalyst Prepared by in-situ synthesis method for CO2 reforming of CH4
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DOI：
10.1016/j.catcom.2013.10.024
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发表时间：
2014-02
影响因子：
3.7
通讯作者：
Xiaoqing Zhang;Ning Wang;Yan Xu;Yongxiang Yin;Shuyong Shang
中科院分区：
文献类型：
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作者：
Xiaoqing Zhang;Ning Wang;Yan Xu;Yongxiang Yin;Shuyong Shang
以γ-Al_2O_3为载体，采用原位合成法制备了一种新型的层状双氢氧化物(LDH)Ni-Mg-Al催化剂。通过甲烷二氧化碳重整反应考察了该催化剂的催化性能，并与浸渍法制备的Ni/MgO/γ-Al_2O_3参比催化剂进行了比较。用X射线衍射仪、氮气吸附-溶出法、透射电子显微镜、热重分析和原子吸收光谱等手段对催化剂进行了表征。结果表明，催化剂的优良性能得益于其较大的比表面积和较小的活性晶粒度，这是由于活性组分在LDHs前驱体上的分子有序分散所致。
A novel Ni–Mg–Al catalyst derived from layered double hydroxides (LDHs) which was prepared on γ-Al2O3by in-situ synthesis method. The catalyst was evaluated by CO2reforming of CH4and a better catalytic performance was obtained compared with a reference catalyst of Ni/MgO/γ-Al2O3prepared by impregnation. The novel catalyst was also characterized by XRD, N2-adsorption-stripping, TEM, TG and AAS (atomic absorption spectrum). The results showed that the excellent performance of the catalyst benefited from its larger specific surface area and smaller active-crystal grain which is due to the molecular-order dispersion of active components over the LDHs precursor.