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Product gas from a 100kW fuel power dual fluidized bed (DFB) steam gasifier for solid biomass was used as fuel for chemical looping combustion in a continuously operated dual circulating fluidized bed (DCFB) 120kW chemical looping combustion (CLC) pilot plant. The two pilot units were coupled through a hot product gas fan. Olivine was used as bed material in the gasifier and a synthetic oxygen carrier...
To meet the aims of the worldwide effort to reduce greenhouse gas emissions, product gas from biomass steam gasification in DFB (dual fluidized bed) gasification plants can play an important role for the production of electricity, fuel for transportation and chemicals. Using a catalytically active bed material, such as olivine, brings advantages concerning tar reduction in the product gas. Experience...
The utilization of biomass for the substitution of fossil fuels to reduce greenhouse gas emissions in biomass steam gasification plants is a promising technology for the production of electricity, heat, and fuels for transportation. Experience from industrial scale dual fluidized bed steam gasification plants showed a modification of the bed material due to the interaction of the bed material (olivine)...
In the last decade the reduction of CO 2 emissions from fossil fuels became a worldwide topic. Co-gasification of coal and wood provides an opportunity to combine the advantages of the well-researched usage of fossil fuels such as coal with CO 2 -neutral biomass. Gasification itself is a technology with many advantages. The producer gas can be used in many ways; for electric power...
A dual circulating fluidized bed pilot plant was operated in chemical looping reforming conditions at a scale of 140kW fuel power with natural gas as fuel. A nickel-based oxygen carrier was used as bed material. The pilot plant is equipped with an adjustable cooling system. Three experimental campaigns have been carried out at 747°C (1020K), 798°C (1071K) and 903°C (1176K), respectively. In each campaign,...
Catalytic steam reforming of a model biogas (CH 4 /CO 2 =60/40) is investigated to produce H 2 -rich synthesis gas. Gas engines benefit from synthesis gas fuel in terms of higher efficiency and lower NO x production when compared to raw biogas or CH 4 . The process is realized in a fixed bed reactor with a Ni-based catalyst on CaO/Al 2 O 3 support...
A one-dimensional steady state model has been developed for the combustion reactor of a dual fluidized bed biomass steam gasification system. The combustion reactor is operated as fast fluidized bed (riser) with staged air introduction (bottom, primary and secondary air). The main fuel i.e., residual biomass char (from the gasifier), is introduced together with the circulating bed material at the...
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