Raney Ni Catalysts Derived from Different Alloy Precursors Part II. CO and CO2 Methanation Activity

다국어 초록 (Multilingual Abstract)

Catalytic activity, in conjunction with reaction mechanism, was studied in the methanation of CO and CO2 on three Raney Ni catalysts derived from different Ni-Al alloys using different leaching conditions. Main products wereCH4 and CO2 in CO methanation, and CH4 and CO in CO2 methanation. Any other hydrocarbon products were notobserved. Over all catalysts, CO methanation showed lower selectivity to methane and higher activation energy thanCO2 methanation. The catalyst derived from alloy having higher Ni content using more severe leaching conditions,namely higher reaction temperature and longer extraction time, showed higher specific activity and higher selectivityto methane both in CO and CO2 2 methanation on Raney Ni catalyst, catalytic activity wasseen to have close relation with the activity to dissociate CO.

참고문헌 (Reference)

1 "？Thermodynamics ofthe Hydrogen of Oxides of Carbon" 1976

2 "？TheEffect of Na2CO3 on the Catalytic Gasification of Rice Straw overNickel Catalysts Supported on Kieselguhr" 2000

3 "？The Structure of RaneyNickel" 1969

4 "？The Structure of RaneyNickel" 1970

5 "？The Kinetics of Methanation on Nickel Cat-alysts" 1980

6 "？The Chemistry andCatalysis of the Water Gas Shift Reaction The Kinetics over SupportedMetal Catalysts" gre (gre): 1981

7 "？The Catalytic Synthesis of Hydrocarbons from H2/CO Mixtures over the Group VIII Metals IV the Kinetic Behaviorof CO Hydrogenation over Ni Catalysts" 1976

8 "？Selective Methanation of CarbonMonoxide" 1970

9 "？ReactionMechanism of Partial Oxidation of Methane to Synthesis Gasover Supported Ni Catalysts" 2003

10 "？Nickel-catalyzed Methanation ReactionsStudied with an in situ Magnetic Induction Method" 1991

11 "？Methanation on Raney Nickel" 1979

12 "？Methanation of Carbon Monoxide on Nickeland Nickel-Copper Alloys" 1976

13 "？Interaction between Nickeland Molybdenum in Ni-Mo/Al2O3 Catalysts" 1998

14 "？Hydrogenationof CO2 over Nickel Catalysts on Rice Husk Ash-alumina Preparedby Incipient Wetness Impregnation" 2003

15 "？Hydrogenation of CO2 onGroup VIII Metals Specific Activity of Ni/SiO2" 1981

16 "？Hydrogenation of CO2 onGroup VIII Metals II Kinetics and Mechanism of CO2 Hydrogenationon Nickel" 1982

17 "？Hydrogenation of CO and CO2over Rhodium Catalysts Supported on Various Metal Oxides" 1982

18 "？Dynamics of the Changes in PhaseComposition and in Catalytic Properties during the Formation ofRaney Ni" 1985

19 "？Difference in the Selectivity of CO andCO2 Methanation Reactions" 1997

20 "？Deactivation of Nickel-basedCatalysts during CO Methanation and Disproportionation" 1987

21 "？Conversion of CH4 and CO2to Syngas and Higher Hydrocarbons using Dielectric Barrier Discharge" 2003

22 "？Complete Removal of CarbonMonoxide in Hydrogen-rich Gas Stream through Methanationover Supported Metal Catalysts ？ International Journal of HydrogenEnergy" 2004

23 "？Comparative Study of the Interactionof CO and CO2 with Ni2 Cluster" 1999

24 "？Advanced Materials for Global Carbon DioxideRecycling" 2001

25 "？Abundancy and Reactivity ofSurface Intermediates in Methanation Determined with TransientKinetic Methods" 1984

26 "from Imagining to Imaging a WorkingSurface" 2003

27 "Comparative Properties of Raney Nickel Proceeding fromNi-Al Intermetallic Phases" 1984