TY - JOUR

T1 - Catalytic Conversion of Syngas into Higher Alcohols over Carbide Catalysts

A1 - Christensen,Jakob Munkholt

A1 - Duchstein,Linus Daniel Leonhard

A1 - Wagner,Jakob Birkedal

A1 - Jensen,Peter Arendt

A1 - Temel,Burcin

A1 - Jensen,Anker Degn

AU - Christensen,Jakob Munkholt

AU - Duchstein,Linus Daniel Leonhard

AU - Wagner,Jakob Birkedal

AU - Jensen,Peter Arendt

AU - Temel,Burcin

AU - Jensen,Anker Degn

PB - American Chemical Society

PY - 2012

Y1 - 2012

N2 - This work investigates the use of the bulk carbides Mo2C, WC, and NbC as catalysts for the conversion of syngas into higher alcohols. K2CO3/WC produces mainly CH3OH and CH4 with a low activity. NbC has a very low activity in CO hydrogenation. K2CO3/Mo2C produces mixed alcohols with a reasonable activity and selectivity. In a 94 h test the activity and the specific surface area of the K2CO3/Mo2C catalyst decreased significantly, but X-ray diffraction and transmission electron microscopy did not indicate a strong sintering of the carbide. A likely cause for the deactivation is the formation of carbonaceous deposits on the catalyst. At the same general activity level Li, K, and Cs provide similar promotional effects for Mo2C, although K at a loading level of alkali metal/Mo = 0.164 mol/mol provides the better behavior at equal conditions. The effect of further additives on the K2CO3/Mo2C system was evaluated, but only Cu yielded an improvement.

AB - This work investigates the use of the bulk carbides Mo2C, WC, and NbC as catalysts for the conversion of syngas into higher alcohols. K2CO3/WC produces mainly CH3OH and CH4 with a low activity. NbC has a very low activity in CO hydrogenation. K2CO3/Mo2C produces mixed alcohols with a reasonable activity and selectivity. In a 94 h test the activity and the specific surface area of the K2CO3/Mo2C catalyst decreased significantly, but X-ray diffraction and transmission electron microscopy did not indicate a strong sintering of the carbide. A likely cause for the deactivation is the formation of carbonaceous deposits on the catalyst. At the same general activity level Li, K, and Cs provide similar promotional effects for Mo2C, although K at a loading level of alkali metal/Mo = 0.164 mol/mol provides the better behavior at equal conditions. The effect of further additives on the K2CO3/Mo2C system was evaluated, but only Cu yielded an improvement.

U2 - 10.1021/ie2018417

DO - 10.1021/ie2018417

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 11

VL - 51

SP - 4161

EP - 4172

ER -