Sub-Pilot-Scale and Bench-Scale Reactor Tests and Thermodynamic Integrated Process Analysis of Production of H<sub>2</sub> from Woody Biomass via Chemical Looping
A thermodynamic integrated process assessment and experimental evaluation of the conversion of woody biomass to H<sub>2</sub> using chemical looping approaches were explored in this work. Both a two- and three-reactor approach were evaluated for effectiveness with a CaFe<sub>2</...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Biomass |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-8783/5/2/30 |
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| Summary: | A thermodynamic integrated process assessment and experimental evaluation of the conversion of woody biomass to H<sub>2</sub> using chemical looping approaches were explored in this work. Both a two- and three-reactor approach were evaluated for effectiveness with a CaFe<sub>2</sub>O<sub>4</sub> oxygen carrier (OC). Experimental test campaigns consisted of semi-batch operations where a single reactor was loaded with a batch charge of the OC and fuel. Multi-reactor approaches were experimentally simulated by switching the gas atmosphere around the batch charge of the OC. The experiments showed that woody biomass was capable of reducing CaFe<sub>2</sub>O<sub>4</sub>, enabling the production of H<sub>2</sub> from steam oxidation. High steam conversion rates to H<sub>2</sub> of >75% were demonstrated. Reduced CaFe<sub>2</sub>O<sub>4</sub> catalyzed tar cracking, multi-cycle tests showed stable reactivity, and sub-pilot-scale tests showed improved reactivity and H<sub>2</sub> yield, accompanied by improved attrition resistance after over 30 cycles. The three-reactor configuration showed the highest potential for H<sub>2</sub> yield between the case studies, while the two-reactor configuration had the lowest auxiliary feed requirement. Both approaches showed increased yields and lower utilities than the baseline steam gasification technology. |
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| ISSN: | 2673-8783 |