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Ulf Söderlind - One of the best experts on this subject based on the ideXlab platform.

  • internal tar ch4 reforming using a novel design in a biomass dual fluidised bed gasifier
    European Biomass Conference and Exhibition Proceedings, 2013
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    Reforming of tars and methane (CH4) in syngas is a significant challenge for low-temperature biomass gasification. For a dual fluidised bed gasifier (DFBG), catalytic bed materials are usually used to promote the reforming reactions. Intensive contact between gas and catalytic bed material at high temperature enhances the internal tar/CH4 reforming. The MIUN gasifier, built for research into Synthetic Fuel production, is a dual fluidised bed gasifier (DFBG). The results with different bed materials (silica sand, olivine and Fe-impregnated olivine) give roughly equivalent amounts of methane and gravimetric tar in the raw untreated syngas, and need to be reduced to an acceptably low level. The gasification research group at MIUN investigates a novel design in the MIUN gasifier, to increase the gasification efficiency, suppress the tar generation and to upgrade the syngas quality. The first step is taken towards a novel design in the MIUN gasifier. The application is expected to significantly enhance the syngas quality.

  • tar ch 4 reforming by catalytic bed materials in a biomass fluidised bed gasifier
    European Biomass Conference and Exhibition Proceedings, 2012
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    A study on in-bed catalytic material reforming of tar/methane (CH4) has been performed in the 150 kW allothermal biomass gasifier at Mid Sweden University (MIUN). The MIUN gasifier, built for research on Synthetic Fuel production, is a dual fluidised bed gasifier (DFBG). The syngas for automotive Fuels synthesis has a strict specification of impurities. The biggest challenge for biomass fluidised-bed gasification is the reforming of tars and CH4. Internal reforming should be considered before downstream reforming. The MIUN gasifier has a unique design suitable for in-bed tar/CH4 catalytic reforming and continuously internal regeneration of the reactive bed material. The experimental tests are carried out in three cases: 1) basic condition with silica sand (no catalytic activity), 2) calcinated olivine, and 3) Fe-impregnated olivine (10%wtFe/Olivine Catalyst). The measurement results have been evaluated by comparing tar/CH4 content in the syngas from the gasifier operated under different operation conditions. These results in BFB mode have initiated the ongoing investigations of the catalytic effects and regeneration in DFB mode. It can be concluded that the Fe-impregnated olivine showed a surprising low reactivity for tar and CH4 reforming in the BFB model.

  • experimental test on a novel dual fluidised bed biomass gasifier for Synthetic Fuel production
    Fuel, 2011
    Co-Authors: Kristina Goransson, Ulf Söderlind
    Abstract:

    This article presents a preliminary test on the 150 kWth allothermal biomass gasifier at MIUN (Mid Sweden University) in Harnosand, Sweden. The MIUN gasifier is a combination of a fluidised bed gas ...

  • experimental test on a novel dual fluidised bed biomass gasifier for Synthetic Fuel production
    Fuel, 2011
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    Abstract This article presents a preliminary test on the 150 kWth allothermal biomass gasifier at Mid Sweden University (MIUN) in Harnosand, Sweden. The MIUN gasifier is a combination of a fluidised bed gasifier and a CFB riser as a combustor with a design suitable for in-built tar/CH4 catalytic reforming. The test was carried out by two steps: (1) fluid-dynamic study; (2) measurements of gas composition and tar. A novel solid circulation measurement system which works at high bed temperatures is developed in the presented work. The results show the dependency of bed material circulation rate on the superficial gas velocity in the combustor, the bed material inventory and the aeration of solids flow between the bottoms of the gasifier and the combustor. A strong influence of circulation rate on the temperature difference between the combustor and the gasifier was identified. The syngas analysis showed that, as steam/biomass (S/B) ratio increases, CH4 content decreases and H2/CO ratio increases. Furthermore the total tar content decreases with increasing steam/biomass ratio and increasing temperature. The biomass gasification technology at MIUN is simple, cheap, reliable, and can obtain a syngas of high CO + H2 concentration with sufficient high ratio of H2 to CO, which may be suitable for synthesis of methane, DME, FT-Fuels or alcohol Fuels. The measurement results of MIUN gasifier have been compared with other gasifiers. The main differences can be observed in the H2 and the CO content, as well as the tar content. These can be explained by differences in the feed systems, operating temperature, S/B ratio or bed material catalytic effect, etc.

Kristina Goransson - One of the best experts on this subject based on the ideXlab platform.

  • internal tar ch4 reforming using a novel design in a biomass dual fluidised bed gasifier
    European Biomass Conference and Exhibition Proceedings, 2013
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    Reforming of tars and methane (CH4) in syngas is a significant challenge for low-temperature biomass gasification. For a dual fluidised bed gasifier (DFBG), catalytic bed materials are usually used to promote the reforming reactions. Intensive contact between gas and catalytic bed material at high temperature enhances the internal tar/CH4 reforming. The MIUN gasifier, built for research into Synthetic Fuel production, is a dual fluidised bed gasifier (DFBG). The results with different bed materials (silica sand, olivine and Fe-impregnated olivine) give roughly equivalent amounts of methane and gravimetric tar in the raw untreated syngas, and need to be reduced to an acceptably low level. The gasification research group at MIUN investigates a novel design in the MIUN gasifier, to increase the gasification efficiency, suppress the tar generation and to upgrade the syngas quality. The first step is taken towards a novel design in the MIUN gasifier. The application is expected to significantly enhance the syngas quality.

  • tar ch 4 reforming by catalytic bed materials in a biomass fluidised bed gasifier
    European Biomass Conference and Exhibition Proceedings, 2012
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    A study on in-bed catalytic material reforming of tar/methane (CH4) has been performed in the 150 kW allothermal biomass gasifier at Mid Sweden University (MIUN). The MIUN gasifier, built for research on Synthetic Fuel production, is a dual fluidised bed gasifier (DFBG). The syngas for automotive Fuels synthesis has a strict specification of impurities. The biggest challenge for biomass fluidised-bed gasification is the reforming of tars and CH4. Internal reforming should be considered before downstream reforming. The MIUN gasifier has a unique design suitable for in-bed tar/CH4 catalytic reforming and continuously internal regeneration of the reactive bed material. The experimental tests are carried out in three cases: 1) basic condition with silica sand (no catalytic activity), 2) calcinated olivine, and 3) Fe-impregnated olivine (10%wtFe/Olivine Catalyst). The measurement results have been evaluated by comparing tar/CH4 content in the syngas from the gasifier operated under different operation conditions. These results in BFB mode have initiated the ongoing investigations of the catalytic effects and regeneration in DFB mode. It can be concluded that the Fe-impregnated olivine showed a surprising low reactivity for tar and CH4 reforming in the BFB model.

  • experimental test on a novel dual fluidised bed biomass gasifier for Synthetic Fuel production
    Fuel, 2011
    Co-Authors: Kristina Goransson, Ulf Söderlind
    Abstract:

    This article presents a preliminary test on the 150 kWth allothermal biomass gasifier at MIUN (Mid Sweden University) in Harnosand, Sweden. The MIUN gasifier is a combination of a fluidised bed gas ...

  • experimental test on a novel dual fluidised bed biomass gasifier for Synthetic Fuel production
    Fuel, 2011
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    Abstract This article presents a preliminary test on the 150 kWth allothermal biomass gasifier at Mid Sweden University (MIUN) in Harnosand, Sweden. The MIUN gasifier is a combination of a fluidised bed gasifier and a CFB riser as a combustor with a design suitable for in-built tar/CH4 catalytic reforming. The test was carried out by two steps: (1) fluid-dynamic study; (2) measurements of gas composition and tar. A novel solid circulation measurement system which works at high bed temperatures is developed in the presented work. The results show the dependency of bed material circulation rate on the superficial gas velocity in the combustor, the bed material inventory and the aeration of solids flow between the bottoms of the gasifier and the combustor. A strong influence of circulation rate on the temperature difference between the combustor and the gasifier was identified. The syngas analysis showed that, as steam/biomass (S/B) ratio increases, CH4 content decreases and H2/CO ratio increases. Furthermore the total tar content decreases with increasing steam/biomass ratio and increasing temperature. The biomass gasification technology at MIUN is simple, cheap, reliable, and can obtain a syngas of high CO + H2 concentration with sufficient high ratio of H2 to CO, which may be suitable for synthesis of methane, DME, FT-Fuels or alcohol Fuels. The measurement results of MIUN gasifier have been compared with other gasifiers. The main differences can be observed in the H2 and the CO content, as well as the tar content. These can be explained by differences in the feed systems, operating temperature, S/B ratio or bed material catalytic effect, etc.

Kunio Yoshikawa - One of the best experts on this subject based on the ideXlab platform.

  • Development of a high-temperature air-blown gasification system.
    Bioresource Technology, 2001
    Co-Authors: Carlson C.p. Pian, Kunio Yoshikawa
    Abstract:

    Current status of high-temperature air-blown gasification technology development is reviewed. This advanced gasification system utilizes preheated air to convert coal and waste-derived Fuels into Synthetic Fuel gas and value-added byproducts. A series of demonstrated, independent technologies are combined to form the core of this gasification system. A high-temperature, rapid devolatilization process is used to enhance the volatile yields from the Fuel and to improve the gasification efficiency. A high-temperature pebble bed filter is used to remove the slag and particulates from the Synthetic Fuel gas. Finally, a novel regenerative heater is used to supply the high-temperature air for the gasifier. Component development tests have shown that higher gasification efficiencies can be obtained at more Fuel-rich operating conditions when high-temperature air is used as the gasification agent. Test results also demonstrated the flex-Fuel capabilities of the gasifier design. Potential uses of this technology range from large-scale integrated gasification power plants to small-scale waste-to-energy applications.

Wennan Zhang - One of the best experts on this subject based on the ideXlab platform.

  • internal tar ch4 reforming using a novel design in a biomass dual fluidised bed gasifier
    European Biomass Conference and Exhibition Proceedings, 2013
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    Reforming of tars and methane (CH4) in syngas is a significant challenge for low-temperature biomass gasification. For a dual fluidised bed gasifier (DFBG), catalytic bed materials are usually used to promote the reforming reactions. Intensive contact between gas and catalytic bed material at high temperature enhances the internal tar/CH4 reforming. The MIUN gasifier, built for research into Synthetic Fuel production, is a dual fluidised bed gasifier (DFBG). The results with different bed materials (silica sand, olivine and Fe-impregnated olivine) give roughly equivalent amounts of methane and gravimetric tar in the raw untreated syngas, and need to be reduced to an acceptably low level. The gasification research group at MIUN investigates a novel design in the MIUN gasifier, to increase the gasification efficiency, suppress the tar generation and to upgrade the syngas quality. The first step is taken towards a novel design in the MIUN gasifier. The application is expected to significantly enhance the syngas quality.

  • tar ch 4 reforming by catalytic bed materials in a biomass fluidised bed gasifier
    European Biomass Conference and Exhibition Proceedings, 2012
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    A study on in-bed catalytic material reforming of tar/methane (CH4) has been performed in the 150 kW allothermal biomass gasifier at Mid Sweden University (MIUN). The MIUN gasifier, built for research on Synthetic Fuel production, is a dual fluidised bed gasifier (DFBG). The syngas for automotive Fuels synthesis has a strict specification of impurities. The biggest challenge for biomass fluidised-bed gasification is the reforming of tars and CH4. Internal reforming should be considered before downstream reforming. The MIUN gasifier has a unique design suitable for in-bed tar/CH4 catalytic reforming and continuously internal regeneration of the reactive bed material. The experimental tests are carried out in three cases: 1) basic condition with silica sand (no catalytic activity), 2) calcinated olivine, and 3) Fe-impregnated olivine (10%wtFe/Olivine Catalyst). The measurement results have been evaluated by comparing tar/CH4 content in the syngas from the gasifier operated under different operation conditions. These results in BFB mode have initiated the ongoing investigations of the catalytic effects and regeneration in DFB mode. It can be concluded that the Fe-impregnated olivine showed a surprising low reactivity for tar and CH4 reforming in the BFB model.

  • experimental test on a novel dual fluidised bed biomass gasifier for Synthetic Fuel production
    Fuel, 2011
    Co-Authors: Kristina Goransson, Ulf Söderlind, Wennan Zhang
    Abstract:

    Abstract This article presents a preliminary test on the 150 kWth allothermal biomass gasifier at Mid Sweden University (MIUN) in Harnosand, Sweden. The MIUN gasifier is a combination of a fluidised bed gasifier and a CFB riser as a combustor with a design suitable for in-built tar/CH4 catalytic reforming. The test was carried out by two steps: (1) fluid-dynamic study; (2) measurements of gas composition and tar. A novel solid circulation measurement system which works at high bed temperatures is developed in the presented work. The results show the dependency of bed material circulation rate on the superficial gas velocity in the combustor, the bed material inventory and the aeration of solids flow between the bottoms of the gasifier and the combustor. A strong influence of circulation rate on the temperature difference between the combustor and the gasifier was identified. The syngas analysis showed that, as steam/biomass (S/B) ratio increases, CH4 content decreases and H2/CO ratio increases. Furthermore the total tar content decreases with increasing steam/biomass ratio and increasing temperature. The biomass gasification technology at MIUN is simple, cheap, reliable, and can obtain a syngas of high CO + H2 concentration with sufficient high ratio of H2 to CO, which may be suitable for synthesis of methane, DME, FT-Fuels or alcohol Fuels. The measurement results of MIUN gasifier have been compared with other gasifiers. The main differences can be observed in the H2 and the CO content, as well as the tar content. These can be explained by differences in the feed systems, operating temperature, S/B ratio or bed material catalytic effect, etc.

Carlson C.p. Pian - One of the best experts on this subject based on the ideXlab platform.

  • High-temperature, air-blown gasification of dairy-farm wastes for energy production
    Energy, 2003
    Co-Authors: Lincoln C. Young, Carlson C.p. Pian
    Abstract:

    A study was carried out to investigate the feasibility of integrating an advanced gasifier into the operation of a dairy farm for converting biomass wastes into Fuel gas that can be used for power production. The disposal/utilization of excess animal wastes is a serious problem facing the dairy industry. Implementation of a gasification system on the dairy farm may provide an economical means of disposing of this waste. In our scheme, an advanced, high-temperature air-blown gasification system is used to convert the waste into Synthetic Fuel gas. A ceramic regenerative heater supplies the high-temperature air. Results of performance calculations indicated gasification conversion efficiencies of 65–85 % are possible, depending on the gasifier operating configuration. The syngas produced by the gasifier can be used on the farm for generating electricity and heat, or for other energy needs, thus helping to reduce the operating cost of the farm. In a case study, using information collected from an Upstate New York dairy farm, the results showed that gasification of dairy wastes would allow this particular farm to produce more than two times the amount of energy required for self-sufficiency.

  • Development of a high-temperature air-blown gasification system.
    Bioresource Technology, 2001
    Co-Authors: Carlson C.p. Pian, Kunio Yoshikawa
    Abstract:

    Current status of high-temperature air-blown gasification technology development is reviewed. This advanced gasification system utilizes preheated air to convert coal and waste-derived Fuels into Synthetic Fuel gas and value-added byproducts. A series of demonstrated, independent technologies are combined to form the core of this gasification system. A high-temperature, rapid devolatilization process is used to enhance the volatile yields from the Fuel and to improve the gasification efficiency. A high-temperature pebble bed filter is used to remove the slag and particulates from the Synthetic Fuel gas. Finally, a novel regenerative heater is used to supply the high-temperature air for the gasifier. Component development tests have shown that higher gasification efficiencies can be obtained at more Fuel-rich operating conditions when high-temperature air is used as the gasification agent. Test results also demonstrated the flex-Fuel capabilities of the gasifier design. Potential uses of this technology range from large-scale integrated gasification power plants to small-scale waste-to-energy applications.