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Catalytically active species in Ni-based catalytic systems for low-temperature methanol synthesis probed by in situ ATR/FTIR in combination with reaction kinetics

Paper ID Volume ID Publish Year Pages File Format Full-Text
43936 45996 2006 5 PDF Available
Title
Catalytically active species in Ni-based catalytic systems for low-temperature methanol synthesis probed by in situ ATR/FTIR in combination with reaction kinetics
Abstract

An in situ ATR/FTIR technique was employed to probe the transformation of the nickel precursor in a catalyst composed of Ni(OCOCH3)2 and CH3OK for low-temperature methanol synthesis in a liquid medium. Homogeneous nickel species, Ni(CO)4 and a hydridocarbonylnickel anion ([HNi(CO)3]− and/or [HNi2(CO)6]−) were simultaneously derived from Ni(OCOCH3)2 during the reaction. Reaction kinetics in combination with in situ FTIR observation revealed that the ratio of the reaction rate between the catalysts with different nickel precursors, i.e. Ni(OCOCH3)2/CH3OK and Ni(CO)4/CH3OK, agreed with the ratio of the infrared absorption assigned to the nickel anion. This supports the proposed reaction scheme in which methanol is formed through methyl formate and the nickel anion catalyzes the rate-determining hydrogenation step of methyl formate.

Keywords
Low-temperature methanol synthesis; In situ ATR/FTIR; Nickel precursor; Hydridocarbonylnickel anion; Reaction kinetics
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Catalytically active species in Ni-based catalytic systems for low-temperature methanol synthesis probed by in situ ATR/FTIR in combination with reaction kinetics
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 313, Issue 1, 25 September 2006, Pages 58–62
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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