Catalytic steam‐gasification of biomass in a fluidized bed reactor

Abstract

BACKGROUND The depletion of fossil fuels and the increasing demands for clean energy, make biomass energy a promising sustainable alternative to fossil fuels. Biomass gasification is a promising pathway for producing gas and other valuable products using biomass materials (wood residue, agricultural waste, bagasse, etc.). RESULTS The tar cracking and char conversion increased slowly at lower temperatures (750–800 °C) and rapidly at higher temperatures (800–900 °C). The results also indicated that a reduction in the biomass particle size leads to a slight improvement in the gasification characterstics. With increasing steam–biomass ratio, gas yield increased while the yield of tar and char showed an opposite trend. CONCLUSION Increasing temperature and steam introduction significantly promoted tar destruction and gas production. In terms of catalytic activity, both catalysts showed good performance regarding the destruction of tars but dolomite was more active than olivine. © 2018 Society of Chemical Industry

Application of Fe Based Composite Catalyst in Biomass Steam Gasification to Produce Hydrogen Rich Gas

“…When SBR increased from 0.6 to 1.0, the gas yield increased from 49.7% to 60.4%, and the yields of tar and char decreased from 3.2% to 2.5% and 47.1.% to 37.1% respectively. These trends are highly consistent with other reports by researchers ( Zhou et al, 2018 ). However, when too much steam is introduced and SBR is 1.2, the gas production rate decreases, which may be caused by the decrease of temperature in the furnace caused by the heat absorbed by excess water.…”

Fluidised bed gasification of biomasses and wastes to produce hydrogen‐rich syn‐gas – a review

“…The approaches for the reduction of tar formation and for its removal from syn‐gas can be divided into treatments inside the gasifier (primary methods) and hot gas cleaning downstream of the gasifier (secondary methods). Primary methods are based on the adequate selection of gasifier design and operating parameters, and use of an appropriate bed additive or catalyst 25 . Secondary methods are based on thermal or catalytic tar cracking, and mechanical processes such as use of cyclones, fabric or electrostatic filters and wet scrubbers.…”

“…Primary methods are based on the adequate selection of gasifier design and operating parameters, and use of an appropriate bed additive or catalyst. 25 Secondary methods are based on thermal or catalytic tar cracking, and mechanical processes such as use of cyclones, fabric or electrostatic filters and wet scrubbers. It is likely that an adequate combination of primary and secondary treatments may optimise the gasifier performance, allowing the production of a high-quality producer gas, able to meet the cleaning requirements of different end-use devices.…”

Catalytic upgrading of bio‐oil: Hydrodeoxygenation study of acetone as molecule model of ketones

“…[ 2 ] It is therefore necessary to meet the increasing global demand for energy while considering environmental issues, and biomass feedstock is regarded as a sustainable, clean, and abundant energy source for producing new liquid fuels such as bio‐oil. [ 3 ] In a similar way to the petroleum industry refining process, catalytic hydrotreatment (such as hydrodeoxygenation, HDO) has been considered essential in the upgrading of bio‐oil. HDO has a higher capacity to remove oxygen while generating less coke and increase the H/C ratio of the products, [ 4 ] and can also be used to produce upgraded bio‐fuels and several high value‐added chemicals to avoid the greenhouse effect.…”