钴改性的镍催化甲烷二氧化碳重整反应研究
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摘要
以CeO_2作为载体,合成了含有更多金属活性位点的钴镍双金属催化剂,并用于催化甲烷二氧化碳重整反应的研究。为了深入探讨双金属催化剂中钴和镍之间的作用机制,通过改变两种活性金属钴和镍的加入顺序,分别合成了Co-Ni/CeO_2、Ni-Co/CeO_2和Ni Co/CeO_2催化剂。与单金属催化剂对比,研究了Co的加入对镍基催化剂的影响,并确认了双金属催化剂中Co与Ni存在的状态和加入顺序对催化剂催化性能的影响。
Novel cobalt-nickel bimetallic catalysts containing more active sites were synthesized by using CeO_2 as a carrier,which were investigated as the catalysts for the carbon dioxide reforming of methane reaction. In order to deeply discuss the mechanism between cobalt and nickel in the bimetallic catalysts,the addition order of the two active metals was changed and three kinds of catalysts were synthesized,such as Co-Ni/CeO_2,Ni-Co/CeO_2,Ni Co/CeO_2,and so on.The influence of the addition of Co on the nickel-based catalyst was studied by comparing with the single metal catalyst.It was confirmed that the state of the presence of Co and Ni in the bimetallic catalysts and the order of addition both affected the catalytic performance of the catalysts.
Novel cobalt-nickel bimetallic catalysts containing more active sites were synthesized by using CeO_2 as a carrier,which were investigated as the catalysts for the carbon dioxide reforming of methane reaction. In order to deeply discuss the mechanism between cobalt and nickel in the bimetallic catalysts,the addition order of the two active metals was changed and three kinds of catalysts were synthesized,such as Co-Ni/CeO_2,Ni-Co/CeO_2,Ni Co/CeO_2,and so on.The influence of the addition of Co on the nickel-based catalyst was studied by comparing with the single metal catalyst.It was confirmed that the state of the presence of Co and Ni in the bimetallic catalysts and the order of addition both affected the catalytic performance of the catalysts.
引文
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[3]de Miguel S R,Vilella I M J,Maina S P,et al.Influence of Pt addition to Ni catalysts on the catalytic performance for long term dry reforming of methane[J].Appl.Catal.A-Gen.,2012,435:10-18.
[4]Wang H Y,Ruckenstein E.Carbon dioxide reforming of methane to synthesis gas over supported rhodium catalysts:the effect of support[J].Appl.Catal.A,2000,204(1):143-152.
[5]Ashcroft A T,Cheetham A K,Foord J S,et al.Selective oxidation of methane to synthesis gas using transition metal catalysts[J].Nature,1990,344:319-321.
[6]Pakhare D,Spivey J.A review of dry(CO2)reforming of methane over noble metal catalysts[J].Chem.Soc.Rev.,2014,43(22):7813-7837.
[7]Ewbank J L,Kovarik L,Kenvin C C,et al.Effect of preparation methods on the performance of Co/Al2O3catalysts for dry reforming ofmethane[J].Green.Chem,2014,16(2):885-896.
[8]张三兵,李作鹏,鲁润华,等.羟基磷灰石负载Ni催化剂中Ni含量对催化甲烷二氧化碳重整制合成气性能的影响[J].燃料化学学报,2014,42(4):461-466.
[9]纪敏,吴越.Ni/γ-Al2O3,Ni/Mg O,Ni/Si O2催化剂上甲烷与二氧化碳重整反应的研究[J].分子催化,1997,11(1):6-12.
[10]陈娟荣,黎先财,杨祈凤,等.Ba Ti O3负载Ni-Co双金属催化剂催化CH4/CO2重整反应[J].天然气化工(化学与化工),2007,32(4):20-23.
[11]黄传敬,郑小明,费金华.甲烷与二氧化碳重整制合成气镍-钴双金属催化剂[J].应用化学,2001,18(9):741-745.
[12]Zhao Y,Li H,Li H X.Ni Co@Si O2core-shell catalyst with high activity and long lifetime for CO2conversion through DRM reaction[J].Nano.Energy,2018,45:101-108.
[13]宋一兵,董新法,林维明.Ni-Ce/A1203催化剂上CH4、CO2和O2催化重整制合成气[J].华南理工大学学报(自然科学版),2002,30(8):16-19.
[14]Zhang H G,Wang H,Dalai A K.Effects of metal content on activityand stability of Ni-Co bimetallic catalysts for CO2reforming of CH4[J].Appl.Catal.A:general,2008,339:121-129.
[15]Tokunagu O,Ogasuwara S.Reduction of carbon dioxide with methaneover Ni-catalyste[J].React.Kinet.Catal.L.,1989,39(1):69-74.
[16]Guo J J,Lou H,Zheng X M.The deposition of coke frommcthane on a Ni/Mg A12O4catalyst[J].Carbon,2007,45:1314-1321.
[17]Daza C E,Gallego J,Moreno J A,et al.CO2reforming of methane over Ni/Mg/Al/Ce mixed oxides[J].Cataly Today,2008,133-135:357-366.
[18]Wang J X,Liu Y,Cheng T X,et al.Methane reforming with carbon dioxide to synthesis gas over Co-doped Ni-based magnetoplumbite catalysts[J].Appl.Catal.A:general,2003,250:13-23.
[19]Zhang J G,Wang H,Dalai A K.Development of stable bimetallie catalysis for carbon dioxide reforming of methane[J].J.Catal.,2007,249:300-310.
[20]王芳,胡雅琴,吕永康,等.甲烷二氧化碳重整中钴基催化剂催化性能影响因素的研究[J].山西大同学报(自然科学版),2013(4):30-33.
[21]Choi J S,Moon K I,Kim Y G,et al.Stable carbon dioxide reforming of methane over modified Ni/Al2O3catalysis[J].Catal.Lett,1998,52:43-47.