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CeO2 Promoted Ni-MgO-Al2O3 nanocatalysts for carbon dioxide reforming of methane
Journal of CO2 Utilization ( IF 7.2 ) Pub Date : 2017-12-30 , DOI: 10.1016/j.jcou.2017.12.015
Ehsan Akbari , Seyed Mehdi Alavi , Mehran Rezaei

In this study, the catalytic performance of the CeO2 promoted Ni-MgO-Al2O3 catalysts with different preparation methods was studied in carbon dioxide reforming of methane (CDRM) for the production of synthesis gas. The nitrogen adsorption/desorption (BET), X-ray diffraction (XRD), temperature-programmed reduction and oxidation (TPR and TPO), scanning electron microscopy (SEM) techniques were used to characterize the samples. The obtained results showed that the Ce addition to Ni-MgO-Al2O3 catalyst with the high specific surface area has a significant influence on the metal crystallite size, reduction properties, and coke deposition. The CeO2-Ni-MgO-Al2O3 catalyst with cerium content of 3 wt.% prepared by the impregnation method possessed the highest resistance against carbon formation in CDRM. In addition, the catalytic results confirmed that the feed ratio (CO2/CH4) and GHSV affected the catalytic activity. However, the CH4 and CO2 conversions improved when the cerium was added to Ni-MgO-Al2O3 catalysts.



中文翻译:

CeO 2助催化的Ni-MgO-Al 2 O 3纳米催化剂用于甲烷的二氧化碳重整

在这项研究中,研究了CeO 2促进的Ni-MgO-Al 2 O 3催化剂在不同的制备方法下对甲烷二氧化碳重整(CDRM)产生合成气的催化性能。使用氮吸附/解吸(BET),X射线衍射(XRD),程序升温还原和氧化(TPR和TPO),扫描电子显微镜(SEM)技术来表征样品。所得结果表明,Ce添加到具有高比表面积的Ni-MgO-Al 2 O 3催化剂中对金属微晶尺寸,还原性能和焦炭沉积具有显着影响。CeO 2 -Ni-MgO-Al 2 O通过浸渍法制得的铈含量为3重量%的3催化剂在CDRM中具有最高的抗碳形成性。另外,催化结果证实进料比(CO 2 / CH 4)和GHSV影响催化活性。然而,当将铈添加到Ni-MgO-Al 2 O 3催化剂中时,CH 4和CO 2转化率提高。

更新日期:2017-12-30
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