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Improving the steam reforming of ethanol by Ni/Al 2 O 3 /CaO composite was investigated in this work. The CO 2  sorbent plays a key role in the catalytic reaction enhancement. The reforming catalysts were prepared by the as-prepared 10 wt.% Ni/Al 2 O 3  physical mixing with CaO sorbents (from Ca(OH) 2  conversion). All reforming experiments were performed under 873K condition. In addition, the suitable parameters of mass ratio of Ni catalyst/CO 2  sorbent (20 : 80 w/w) and steam / ethanol molar ratio of five were adjusted in this work. The results indicate that the steam reforming of ethanol via CO 2  sorption enhancement obviously produced ∼95% H 2  greater than common steam reforming of ethanol (∼72% H 2 ). Other by-products involving CO 2 , CO and CH 4  can be also obviously suppressed during reaction. For the sorption-enhanced steam reforming, the recyclability of CO 2  sorbent is an important issue. The 10 cycles of reaction/regeneration at 873K and 1023K for the steam reforming of ethanol were tested. The results reveal the H 2  concentration of products stably keeps above 90% during the cycles test. The performance of CO 2  sorbent was insignificant change after 10 cycles. The average capture capacity of CO 2  around 17.8 wt.% can be determined during cycles.

Synthesis of Ni/Al2O3/CaO Composite Catalyst for Hydrogen Production by Steam Reforming of Ethanol