Improving the steam reforming of ethanol by Ni/Al2O3/CaO composite was investigated in this work. The CO2 sorbent plays a key role in the catalytic reaction enhancement. The reforming catalysts were prepared by the as-prepared 10 wt.% Ni/Al2O3 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/CO2 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 CO2 sorption enhancement obviously produced ∼95% H2 greater than common steam reforming of ethanol (∼72% H2). Other by-products involving CO2, CO and CH4 can be also obviously suppressed during reaction. For the sorption-enhanced steam reforming, the recyclability of CO2 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 H2 concentration of products stably keeps above 90% during the cycles test. The performance of CO2 sorbent was insignificant change after 10 cycles. The average capture capacity of CO2 around 17.8 wt.% can be determined during cycles.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2020 Aug 13|
|Event||2019 8th International Conference on Chemical Science and Engineering, ICCSE 2019 - Taipei, Taiwan|
Duration: 2019 Nov 18 → 2019 Nov 20
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)