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ABSTRACT
Although biomass gasification is well recognized as a practical method for producing syngas, the generated gas cannot be used in a variety of applications because of technological issues like tar formation. In this research, coal bottom ash (CBA) was used as an in-bed material for the experimental examination of biomass (wood chips) gasification in a fluidized bed system. All tests were conducted at reaction temperatures between 750 and 900 C, steam to biomass ratios between 0.24 and 0.96, CBA particle sizes between 0.22 and 1.2 mm, and biomass particle sizes between 0.5 and 3.0 mm. The primary objective of this research is to use an experimental set-up to assess the effectiveness of steam gasification of biomass using CBA with various particle sizes. The findings showed that using steam as a gasification agent and raising the temperature improved tar cracking and H2 generation. The findings also demonstrated that the catalyst particle size is efficient for H2 production and that CBA can be used as an in-bed material for the production of H2-rich syngas. Under an 850°C reaction temperature, a S/B of 0.96, a CBA size of 0.2–0.4 mm (Case I), and a biomass particle size of 0.5–1.2 mm, the H2 concentration achieved a maximum of 65.7 vol%. (Case I).
Abbreviations
| CBA | = | Coal Bottom Ash |
| CHP | = | Combined Heat and Power |
| DME | = | Dimethyl Ether |
| HHV | = | Higher Heating Value |
| S/B | = | Steam/Biomass ratio |
Acknowledgements
This paper is supported by Science Popularization Special Fund Project of Shaanxi Science and Technology Association (Grant: GJ2021-34), International Joint Research Center for Electromechanical Engineering and Precision Manufacturing, Research Project on Postgraduate Education and Teaching Reform of Xi'an University of Technology (Grant: XAGDYJ210203), Xi'an Science and Technology Project (Grant: 2020KJRC0032), Research and Practice Project of Comprehensive Reform of Postgraduate Education in Shaanxi Province (Grant: YJSZG2020075), Science and Technology Planning Project of Shaanxi Province (2020KW-017), Shaanxi Innovation Capability Support Plan (Grant: 2022PT-02), and Shaanxi Key Research and Development Plan (Grant: 2020GY-147).
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Yan Cao
Yan Cao gained a Master Degree in Mechanical Manufacturing from Shandong University of Technology in 1995; obtained a Ph.D degree in Mechanical Engineering from Xi'an Jiaotong University in 1999; conducted postdoctoral research at Xi'an Jiaotong University from 1999 to 2002.
Yu Bai
Yu Bai, Ph.D., Associate Professor, School of Mechanical and Electrical Engineering, Xi'an Technological University. Presided over 1 key research project of Shaanxi Province, 5 research topics of the province and department, published more than 20 academic papers, 7 EI indexed papers, 15 journals, edited more than 30 professional manuals, 5 textbooks, and obtained 4 utility model patents items, and obtained 2 invention patents items.
Jiang Du
Jiang Du, Ph.D., Associate Professor, Master's Supervisor, A School of Mechatronic Engineering, Xi’an Technological University, Xi’an, China; Educational Experience: Graduated from the School of Mechanical and Electrical Engineering at Northwestern Polytechnical University in 2005. Published over 20 papers (3SCI, 4EI), Compiled and Published 19 technical manuals and 8 university planning textbooks.