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- 저자 : Chufei Lv (검색결과 1 건)
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Leilei Xu,Xueying Wen,Mindong Chen,Chufei Lv,Yan Cui,Xianyun Wu,Cai-e Wu,Zhichao Miao,Xun Hu 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.100 No.-
The mesoporous nanosponge MFI silicate zeolite was facilely fabricated by employing the long chainammonium as the structure-directing agent. The zeolite with both mesoporous and microporouschannels were selected as the support of Ni-La catalysts for methanation of CO2. Various techniques wereused to characterize the catalysts systematically. The effects of the La2O3 promotor and pore morphologyof the support on the catalytic performance were carefully investigated. Our study demonstrated that Lapromoter could be beneficial to the increase of the surface basicity and the enhancement of the metallicNi dispersion. This would intensify the processes of the CO2 chemisorption and H2 dissociation in CO2methanation. Besides, we also found that the catalyst supported on mesoporous nanosponge MFI zeoliteperformed higher activity and better long-term stability than the reference catalysts supported on bulkMFI and MCM-48, suggesting that the synergistic effect between the mesoporous and microporouschannels displayed unique advantages. Kinetic study revealed that both the nanosponge structure andLa2O3 promoter contributed to decreasing the reaction activation energy. Therefore, the present highlydispersed Ni-La catalyst over mesoporous nanosponge MFI zeolite promised a potential catalystcandidate for low-temperature CO2 methanation reaction.
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