In order to investigate the relationship between the type of polyol feed and threedimensionally
mesoporous carbon supports with different mesopore structures and
sizes, aqueous phase reforming (APR) reactions of xylitol and glycerol were carried out in a
continuous fixed bed reactor. The effect of reaction conditions such as the reaction temperature
and pressure on the APR performance were studied in the range of 215e250 C and
28e45 bar. Three-dimensionally bimodal mesoporous carbon (3D-BMC) with the larger
secondary mesopores showed the best catalytic performance in terms of carbon conversion
to gas, hydrogen yield, selectivity, and hydrogen production rate due to its unique
mesoporous structure, regardless of the kind of polyol feed. In addition, the reaction
temperature and pressure significantly affected catalytic performance in the APR of polyols.
The product selectivity was dependent on the reaction conditions and the type of
polyol feed. The hydrogen selectivity of glycerol was higher than that of xylitol, whereas
alkane selectivity was higher for xylitol, and the selectivity increased significantly by
promoting the reactions favorable for alkane formation with increased reaction temperature
and pressure
In order to investigate the relationship between the type of polyol feed and threedimensionally
mesoporous carbon supports with different mesopore structures and
sizes, aqueous phase reforming (APR) reactions of xylitol and glycerol were carried out in a
continuous fixed bed reactor. The effect of reaction conditions such as the reaction temperature
and pressure on the APR performance were studied in the range of 215e250 C and
28e45 bar. Three-dimensionally bimodal mesoporous carbon (3D-BMC) with the larger
secondary mesopores showed the best catalytic performance in terms of carbon conversion
to gas, hydrogen yield, selectivity, and hydrogen production rate due to its unique
mesoporous structure, regardless of the kind of polyol feed. In addition, the reaction
temperature and pressure significantly affected catalytic performance in the APR of polyols.
The product selectivity was dependent on the reaction conditions and the type of
polyol feed. The hydrogen selectivity of glycerol was higher than that of xylitol, whereas
alkane selectivity was higher for xylitol, and the selectivity increased significantly by
promoting the reactions favorable for alkane formation with increased reaction temperature
and pressure
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