Reduced graphene oxide supported Ni-Ce catalysts for CO2 methanation: The support and ceria promotion effects

被引:106
作者
Hu, Feiyang [1 ]
Tong, Sai [1 ]
Lu, Kun [1 ]
Chen, Cheng-Meng [2 ]
Su, Fang-Yuan [2 ]
Zhou, Jian [3 ]
Lu, Zhang-Hui [4 ]
Wang, Xuewen [1 ]
Feng, Gang [1 ]
Zhang, Rongbin [1 ]
机构
[1] Nanchang Univ, Coll Chem, Inst Appl Chem, Key Lab Jiangxi Prov Environm & Energy Catalysis, 999 Xuefu Rd, Nanchang 330031, Jiangxi, Peoples R China
[2] Chinese Acad Sci, Inst Coal Chem, Key Lab Carbon Mat, Taiyuan 030001, Shanxi, Peoples R China
[3] Shanghai Res Inst Petrochem Technol SINOPEC, Shanghai 201208, Peoples R China
[4] Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Jiangxi, Peoples R China
基金
中国国家自然科学基金;
关键词
CO2; methanation; Reduced graphene oxide; Ni catalysts; Ceria; Promotion effect; CARBON-DIOXIDE; NI/CEO2-AL2O3; CATALYSTS; NANOPARTICLES; GAS; NANOCOMPOSITE; REDUCTION; METHANOL; HYDROGENATION; PERFORMANCE; NANOSHEETS;
D O I
10.1016/j.jcou.2019.08.020
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The reduced oxide graphene (RGO) supported Ni-based catalysts is prepared and modified with ceria (Ni-Ce/ RGO) for CO2 methanation for the first time in the present work, and compared with the active carbon (AC) and gamma-Al2O3 supported samples. The results show that the catalytic activity of the samples without ceria follow the order Ni/RGO > Ni/gamma-Al2O3 > Ni/AC, vs. samples with ceria Ni-Ce/RGO > Ni-Ce/gamma-Al2O3 > Ni-Ce/AC. The activities of all samples were greatly improved after ceria modification. The Ni-Ce/RGO works the best for CO2 methanation, which could reach the highest CO2 conversion of 84.5% and the highest methane yield of 83.0% at 350 degrees C with atmospheric pressure. The excellent catalytic performance of Ni-Ce/RGO could be attributed to the special support effect of RGO and the ceria promotion effect. The support effect of RGO could be attributed to its large surface area and surface oxygen-containing functional groups, which results in stable anchoring of the active metal. The addition of ceria promotes the Ni dispersion on the supports as well as to accelerate the positive reaction due to the oxygen vacancies of ceria.
引用
收藏
页码:676 / 687
页数:12
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