K. Seshan

Catalytic reforming of biomass derived waste streams in the aqueous phase is a promising process for the production of sustainable hydrogen. Acetic acid will be a major component (up to 20 wt%) in many anticipated gasification feed streams (e.g. the aqueous fraction of pyrolysis oil). Conventional supported (e.g. alumina) catalysts deactivate in the presence of acetic acid rapidly due to coking and metal, support leaching and hence other catalytic systems must be developed to make this process industrially feasible. Carbon nanotubes (CNT) are very resistant to deactivation during acetic acid reforming in supercritical water and are therefore very suitable as catalyst support. Near complete reforming of a 25 wt% acetic acid solution in supercritical water (400 °C, 250 bar) was achieved during 7 h time-on-stream under commercially relevant conditions. The high stability of Ru/CNT for acetic acid reforming in supercritical water has paved the way for studying reforming of real biomass derived waste streams under these conditions.

Aqueous two-phase system

10.1039/c3gc41922c

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Citations (53)

The effect of Nb₂O₅ and ZrO₂ additions on the behaviour of Li/MgO and Li/Na/MgO catalysts for the oxidative coupling of methane

The Canadian Journal of Chemical Engineering (1991)

David McNamara S.J. Korf K. Seshan J.G. van Ommen J.R.H. Ross

Abstract Incorporation of Nb 2 O 5 or ZrO 2 into both Li/MgO and Li/Na/MgO systems produced ternary and quaternary catalysts, respectively, capable of attaining optimal C 2 yields and selectivities at lower temperatures relative to the unpromoted materials. The degree of enhancement effected by these metal oxide additives was compared to that produced by Li/MgO and Li/Na/MgO catalysts promoted with SnO 2 or Co 3 O 4 . At reaction temperatures < 700°C, the Li/Co/MgO ternary system showed marked differences in behaviour compared to the other ternary catalysts tested. This was particularly evident in the variation in C 2 selectivity with time on stream during ageing studies of (i) untreated materials, (ii) materials pretreated in CO 2 , and (iii) materials dosed periodically with CHCI 3 .

Ternary compound

Ternary numeral system

10.1002/cjce.5450690410

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Citations (17)

Steam reforming of acetic acid as a biomass derived oxygenate: Bifunctional pathway for hydrogen formation over Pt/ZrO2 catalysts

Journal of Catalysis (2006)

Kazuhiro Takanabe K. Aika Koji Inazu Tadashi Baba K. Seshan

Oxygenate

Residue (chemistry)

10.1016/j.jcat.2006.07.020

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