Reactivity tests of the water–gas shift reaction on fresh and used fluidized bed materials from industrial DFB biomass gasifiers |
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| Affiliation: | 1. Institute of Sciences, Ni?de University, 51240 Ni?de, Turkey;2. Department of Physics, Ni?de University, 51240 Ni?de, Turkey;3. Department of Physics, Akdeniz University, 07058 Antalya, Turkey;4. Department of Materials Science and Engineering, Çanakkale Onsekiz Mart University, 17000 Çanakkale, Turkey;1. Department of Chemical Engineering and Process Engineering, University of Surrey, Guildford, GU2 7XH, United Kingdom;2. Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica, Instituto Universitario de Materiales de Alicante, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain;1. Bioenergy2020+ GmbH, Wienerstrasse 49, 7540 Güssing, Austria;2. TU Wien, Institute of Chemical Engineering, Getreidemarkt 9, 1060 Wien, Austria;1. School of Sustainable Development of Society and Technology, Mälardalen University (MDH), Sweden;2. Department of Chemical Engineering, Royal Institute of Technology (KTH), Sweden;3. State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, China |
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| Abstract: | The dual fluidized bed gasification process, offers various advantages for biomass gasification as well as the utilization of other solid feedstocks. In order to improve the knowledge of the reactions in fluidized bed gasifier, different types of bed material used in the gasifier were tested in a micro-reactivity test rig. It has been previously observed that during long-term operation, the surface of the bed material used (calcined olivine) undergoes a modification that improves catalytic activity. The main reaction of interest is the water–gas shift reaction. Olivine taken from long-term operation at the 8 MW biomass gasifier at Güssing (Austria), fresh olivine as a reference, and calcite, which is commonly used for enhancing in-bed catalytic tar reduction, were tested using the micro-reactivity test rig. Tests were carried out at temperatures of 800, 850, and 900 °C and space velocities of 40,000 to 50,000 h?1 were applied. CO conversions of up to 61.5% were achieved for calcite. Used olivine showed a similar behavior, representing a large improvement compared to fresh olivine, which had CO conversion rates of less than 20%. |
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