Catalytic performance of perovskite-like oxide doped cerium(La_(2-x)Ce_xCoO_(4±y)) as catalysts for dry reforming of methane
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摘要
A series of oxides(La_(2-x)Ce_xCoO_(4±y)) with perovskite-like structure were prepared by the Pechini sol–gel method for dry reforming of methane reaction(DRM). The prepared catalysts were characterized by BET, XRD,TGA, H_2-TPR and SEM. Experimental results indicate that the addition of Ce can impact both sample morphology and catalytic performance significantly compared with La_2CoO_4 catalyst, and LaCeCoO_4 presented the highest catalytic ability among all the samples. The Ce addition tends to increase the specific surface area of La_(2-x)Ce_xCoO_(4±y)from 0.2 to 8.5 m~2·g~(-1), suggesting that LaCeCoO_4 catalyst contained more well-dispersed active sites and more space to reaction. Moreover, the catalytic performance and anti-coking ability were substantially improved after Ce addition during DRM, which may be attributed to the decrease of LaCoO_3 particle size and growth of oxygen storage capacity, respectively.
A series of oxides(La_(2-x)Ce_xCoO_(4±y)) with perovskite-like structure were prepared by the Pechini sol–gel method for dry reforming of methane reaction(DRM). The prepared catalysts were characterized by BET, XRD,TGA, H_2-TPR and SEM. Experimental results indicate that the addition of Ce can impact both sample morphology and catalytic performance significantly compared with La_2CoO_4 catalyst, and LaCeCoO_4 presented the highest catalytic ability among all the samples. The Ce addition tends to increase the specific surface area of La_(2-x)Ce_xCoO_(4±y)from 0.2 to 8.5 m~2·g~(-1), suggesting that LaCeCoO_4 catalyst contained more well-dispersed active sites and more space to reaction. Moreover, the catalytic performance and anti-coking ability were substantially improved after Ce addition during DRM, which may be attributed to the decrease of LaCoO_3 particle size and growth of oxygen storage capacity, respectively.
A series of oxides(La_(2-x)Ce_xCoO_(4±y)) with perovskite-like structure were prepared by the Pechini sol–gel method for dry reforming of methane reaction(DRM). The prepared catalysts were characterized by BET, XRD,TGA, H_2-TPR and SEM. Experimental results indicate that the addition of Ce can impact both sample morphology and catalytic performance significantly compared with La_2CoO_4 catalyst, and LaCeCoO_4 presented the highest catalytic ability among all the samples. The Ce addition tends to increase the specific surface area of La_(2-x)Ce_xCoO_(4±y)from 0.2 to 8.5 m~2·g~(-1), suggesting that LaCeCoO_4 catalyst contained more well-dispersed active sites and more space to reaction. Moreover, the catalytic performance and anti-coking ability were substantially improved after Ce addition during DRM, which may be attributed to the decrease of LaCoO_3 particle size and growth of oxygen storage capacity, respectively.
引文
[1]D.Pakhare,V.Schwartz,V.Abdelsayed,D.Haynes,D.Shekhawat,J.Poston,J.Spivey,Kinetic and mechanistic study of dry(CO2)reforming of methane over Rhsubstituted La2Zr2O7pyrochlores,J.Catal.316(3)(2014)78-92.
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[22]J.A.C.Ruiz,F.B.Passos,J.M.C.Bueno,E.F.Souza-Aguiar,L.V.Mattos,F.B.Noronha,Syngas production by autothermal reforming of methane on supported platinum catalysts,Appl.Catal.A Gen.334(1)(2008)259-267.
[23]R.Whyman,Production of ethylene glycol from synthesis gas,Unite States Pat.,4665222,1987.
[2]D.Cheng,X.Zhu,Y.F.Ben,F.He,L.Cui,C.J.Liu,Carbon dioxide reforming of methane over Ni/Al2O3treated with glow discharge plasma,Catal.Today 115(1)(2006)205-210.
[3]S.T.Oyama,P.Hacarlioglu,Y.Gub,D.Lee,Dry reforming of methane has no future for hydrogen production:Comparison with steam reforming at high pressure in standard and membrane reactors,Int.J.Hydrog.Energy 37(13)(2012)10444-10450.
[4]R.K.Singha,A.Yadav,A.Shukla,M.Kumar,R.Bal,Low temperature dry reforming of methane over Pd-CeO2nanocatalyst,Catal.Commun.92(2017)19-22.
[5]X.M.Yang,L.Luo,H.Zhong,Structure of La2-xSrxCoO4±λ(x=0.0-1.0)and their catalytic properties in the oxidation of CO and C3H8,Appl.Catal.A Gen.272(1)(2004)299-303.
[6]B.Pant,S.M.Stagg-Williams,Investigation of the stability of Pt/LaCoO3during high temperature reforming reactions,Catal.Commun.5(6)(2004)305-309.
[7]R.Wantannbe,Y.Fujita,T.Tagawa,K.Yamamoto,T.Furusawa,C.Fukuhara,Pdsupport LaCoO3catalyst with structured configuration for water gas shift reaction,Appl.Catal.A Gen.477(17)(2014)75-82.
[8]J.Kichnerova,M.Alifanti,B.Delmon,Evidence of phase cooperation in the LaCoO3-CeO2-Co3O4catalytic system in relation to activity in methane combustion,Appl.Catal.A Gen.231(7)(2002)65-80.
[9]B.D.Caprariis,P.D.Filippis,V.Palma,A.Petrullo,A.Ricca,C.Ruocco,M.Scarsella,Rh,Ru and Pt ternary perovskites type oxides BaZr(1-x)MexO3 for methane dry reforming,Appl.Catal.A Gen.517(2016)47-55.
[10]X.M.Yang,L.T.Luo,H.Zhong,Preparation of LaSrCoO4 mixed oxides and their catalytic properties in the oxidation of CO and C3H8,Catal.Commun.6(1)(2005)13-17.
[11]O.U.Osazuwa,H.D.Setiabudi,R.A.Rasid,C.K.Cheng,Syngas production via methane dry reforming:A novel application of SmCoO3perovskite catalyst,J.Nat.Gas Sci.Eng.42(2017)16459-16475.
[12]W.J.Yuan,Y.Q.Wang,Y.Q.Zou,W.Tan,W.Q.Hou,L.Zheng,F.Wu,L.F.Zhou,Dry reforming of methane for syngas production over well-dispersed mesoporous NiCe0.5Zr0.5O3with Ni nanoparticles immobilized,Catal.Lett.146(9)(2016)1663-1673.
[13]W.Q.Hou,Y.Q.Wang,Y.K.Bai,W.Sun,W.J.Yuan,L.Zheng,X.L.Han,L.F.Zhou,Carbon dioxide reforming of methane over Ni/Mg0.4Al0.4-La0.1Zr0.1(O)catalyst prepared by recombination sol-gel method,Int.J.Hydrog.Energy 303(2017)130-134.
[14]B.J.Liaw,Y.T.Chen,Y.Z.Chen,Reforming of CH4/CO2over Pt catalysts supported on CeO2and CexZr1-xO2oxides,J.Chin.Inst.Chem.Eng.36(2005)253-262.
[15]A.E.Abasaeed,A.S.Al-Fatesh,M.A.Naeem,A.A.Ibrahim,A.H.Fakeeha,Catalytic performance of CeO2and ZrO2supported Co catalysts for hydrogen production via dry reforming of methane,Int.J.Hydrog.Energy 40(21)(2015)6818-6826.
[16]Z.Y.Pu,X.S.Liu,A.P.Jia,Y.L.Xie,J.Q.Lu,M.F.Luo,Enhanced activity for CO oxidation over Pr-and Cu-doped CeO2catalysts:Effect of oxygen vacancies,J.Phys.Chem.C112(38)(2008)15045-15051.
[17]M.Merz,P.Nagel,C.Pinta,A.Samartsev,H.V.Lohneysen,M.Wissinger,S.Uebe,A.Assmann,D.Fuchs,S.Schuppler,X-ray absorption and magnetic circular dichroism of LaCoO3,La0.7Ce0.3CoO3,and La0.7Sr0.3CoO3films:Evidence for cobalt-valencedependent magnetism,Phys.Rev.B Condens.Matter 82(17)(2010)4706-4712.
[18]G.Leofanti,M.Padovan,G.Tozzola,B.Venturelli,Surface area and pore texture of catalysts,Catal.Today 90(4)(1998)207-219.
[19]G.Valderrama,C.U.D.Navarro,M.R.Goldwasser,CO2reforming of CH4over Co-Labased perovskite-type catalyst precursors,J.Power Sources 234(2013)31-37.
[20]S.M.D.Lima,A.M.D.Silva,L.O.O.D.Costa,J.M.Assaf,L.V.Mattos,R.Sarkari,A.Venugopal,F.B.Noronha,Hydrogen production through oxidative steam reforming of ethanol over Ni-based catalysts derived from La1-xCexNiO3perovskite-type oxides,Appl.Catal.B Environ.121(2012)1-9.
[21]T.Guo,J.Du,J.Wu,J.Li,Enhanced properties of solid solution(CeZr)O2modified with metal oxides for catalytic oxidation of low-concentration methane,Chin.J.Chem.Eng.25(2)(2017)187-192.
[22]J.A.C.Ruiz,F.B.Passos,J.M.C.Bueno,E.F.Souza-Aguiar,L.V.Mattos,F.B.Noronha,Syngas production by autothermal reforming of methane on supported platinum catalysts,Appl.Catal.A Gen.334(1)(2008)259-267.
[23]R.Whyman,Production of ethylene glycol from synthesis gas,Unite States Pat.,4665222,1987.