等离子体增强Ni/MCM-41催化剂的制备及性能研究
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摘要
采用等离子体技术强化制备了Ni/MCM-41催化剂,并采用XRD、BET、H2-TPR和TGA对催化剂进行了表征。考察了等离子体处理功率、处理时间、处理方式、处理气氛对CO_2重整甲烷反应的影响。结果表明,等离子体处理Ni/MCM-41催化剂在CO_2重整甲烷反应中表现出较优的催化性能,在反应温度为750℃时,CH_4和CO_2转化率分别为92.6%和87.9%,较未处理的催化剂提高了27.2%和21.1%。
The Ni/MCM-41 catalyst was prepared by plasma technique and characterized by XRD, BET, H_2-TPR and TGA. The effects of plasma treatment power, time, step and atmosphere on the CO_2 reforming of methane reaction were investigated. The results showed that the Ni/MCM-41 catalyst treated by plasma exhibited better catalytic performance in CO_2 reforming of methane. Under the reaction temperature of 750 °C, the conversion of CH_4 and CO_2 were 92.6% and 87.9%, respectively, which were 27.2% and 21.1%higher than those of the untreated catalyst, respectively.
The Ni/MCM-41 catalyst was prepared by plasma technique and characterized by XRD, BET, H_2-TPR and TGA. The effects of plasma treatment power, time, step and atmosphere on the CO_2 reforming of methane reaction were investigated. The results showed that the Ni/MCM-41 catalyst treated by plasma exhibited better catalytic performance in CO_2 reforming of methane. Under the reaction temperature of 750 °C, the conversion of CH_4 and CO_2 were 92.6% and 87.9%, respectively, which were 27.2% and 21.1%higher than those of the untreated catalyst, respectively.
引文
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[2]Arbag H.Effect of impregnation sequence of Mg on performance of mesoporous alumina supported Ni catalyst in dry reforming of methane[J].Int J Hydrogen Energy,2018,27:247-258.
[3]Shah M,Das S,Nayak A K,et al. Smart designing of metal-support interface for imperishable dry reforming catalyst[J].Appl Catal A,2018,556:137-154.
[4]Maoshuai L,van Veen Andre C.Tuning the catalytic performance of Ni-catalysed dry reforming of methane and carbon deposition via Ni-CeO_2-x,interaction[J].Appl Catal B,2018,237:641-648.
[5]Wei T,Jia L,Zheng H.LaMnO3-based perovskite with in-situ exsolved Ni nanoparticles:a highly active,performance stable and coking resistant catalyst for CO_2dry re forming of CH4[J].Appl Catal A,2018,564:199-207
[6]Li X,Huang Y,Zhang Q.Highly stable and anti-coking Ni/MoCeZr/MgAl_2O_4-MgO complex support catalysts for CO2 reforming of CH_4:Effect of the calcination temperature[J].Energy Convers Manage,2019,179:166-177.
[7]Das S,Ashok J,Bian Z.Silica-Ceria sandwiched Ni coreshell catalyst for low temperature dry reforming of biogas:Coke resistance and mechanistic insights[J].Appl Catal B,2018,230:220-236.
[8]Karolyi J,Ne meth M,Evangelisti C.Carbon dioxide reforming of methane over Ni-In/SiO_2 catalyst without coke formation[J].J Ind Eng Chem,2018,58:189-201.
[9]Fang X,Lian J,Nie K.Dry reforming of methane on active and coke resistant Ni/Y_2Zr_2O_7 catalysts treated by dielectric barrier discharge plasma[J].J Nat Gas Chem,2016,25:825-831
[10]Guo F,Xu J Q,Chu W.CO_2 reforming of methane over Mn promoted Ni/Al_2O_3 catalyst treated by N2 glow discharge plasma[J].Catal Today,2015,256:124-129.
[11]Xu Y,Long H,Wei Q.Study of stability of Ni/MgO/γ-Al_2O_3catalyst prepared by plasma for CO_2 reforming of CH4[J].Catal Today,2013,21 1:114-119.
[12]Peng H,Ma H,Liu W.Methane dry reforming on Ni/La_2Zr_2O_7 treated by plasma in different atmospheres[J].J Nat Gas Chem,2015,24:416-424.
[13]Rahemi N,Haghighi H,Babaluo A.Synthesis and physicochemical characterizations of Ni/Al_2O_3-ZrO_2 nanocatalyst prepared via impregnation method and treated with non-thermal plasma for CO_2 re forming of CH_4[J].J Ind Eng Chem,2013,19:1566-1576.
[14]Aghamohammadi S,Haghighi M,Maleki M.Sequential impregnation vs sol-gel synthesized Ni/Al_2O_3-CeO_2nanocatalyst for dry reforming of methane:Effect of synthesis method and support promotion[J].J Mol Catal,2017,431:39-48.
[15]Rahemi N,Haghighi M,Babaluo A A.Syngas productionfrom reforming of greenhouse gases CH_4/CO_2 over NiCu/A1203 nanocatalyst:Impregnated vs.plasma-treated catalyst[J].Energy Convers Manage,2014,84:50-59.