Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5148066 | International Journal of Hydrogen Energy | 2017 | 10 Pages |
Abstract
The reactivity of dolomite, limestone and NiO/Dolomite toward hydrogen production during high temperature steam gasification of biomass were evaluated. NiO/Dolomite additive was prepared from impregnation of NiO on dolomite surface. Reactor with gasification bed operated at 900 °C and sorption/reforming bed operated at 730 °C at downstream was applied in this paper. Results show that co-gasification of biomass and additive increased overall gas yield and also the CO2 concentration. With dolomite in the sorption/reforming bed and none additive in gasification bed, the highest hydrogen concentration was achieved (71.8 vol.%). With 2wt.% NiO/Dolomite in the sorption/reforming bed and dolomite in the gasification bed separately, the highest hydrogen yield (510 cm3/g) was reached. Further increasing NiO content decreased hydrogen yield, sorption capacity and increased coke deposition. Calcination of NiO/Dolomite at 950 °C led to formation of NiOMgO phase and reduced to NiMgO phase during gasification which increased the catalysis of the additive.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Bo Zhang, Li Zhang, Zhongqing Yang, Zhixia He,