Regulation Mechanism of Solid Waste on Ash Fusion Characteristics of Sorghum Straw under O 2 /CO 2 Atmosphere
Ziqiang Yang,
Fenghai Li (hzlfh@163.com),
Mingjie Ma,
Xuefei Liu,
Hongli Fan,
Zhenzhu Li,
Yong Wang and
Yitian Fang
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Ziqiang Yang: College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China
Fenghai Li: College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China
Mingjie Ma: College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China
Xuefei Liu: College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China
Hongli Fan: School of Chemistry and Chemical Engineering, Heze University, Heze 274015, China
Zhenzhu Li: Shandong Meiyu Engineering Consulting Co., Ltd., Heze 274700, China
Yong Wang: Shandong Hongda Chemical Co., Ltd., Heze 274700, China
Yitian Fang: Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
Energies, 2023, vol. 16, issue 20, 1-17
Abstract:
Co-combustion of solid waste and biomass can alleviate biomass ash-related problems. To investigate the effects of solid waste on the ash fusion characteristics of biomass and its variation mechanisms under an oxidation atmosphere, an X-ray diffraction, thermogravimetric analyzer (TG), scanning electron microscope (SEM), and FactSage calculation were used to examine the ash fusion behaviors of sorghum straw (SS) with the addition of textile dyeing sludge (TDS) or chicken manure (CM). The ash fusion temperature (AFT) of SS increased gradually with the TDS ash addition; with CM ash addition, the AFT of SS mixtures increased rapidly (0–20%), decreased slightly (20–30%), and finally increased slowly (30–60%). The generations of high melting point (MP) minerals (e.g., KAlSi 2 O 6 , Fe 2 O 3 , and Fe 3 O 4 ) led to an increase in the AFT of TDS-SS mixtures. The K + in silicate was gradually replaced by Mg 2+ or Ca 2+ , which caused the generations of high-MP minerals (e.g., Ca 3 MgSi 2 O 8 , Ca 2 MgSi 2 O 7 , and CaMgSiO 4 ). The TG analysis showed that the additions of TDS or CM ash slowed down the weight loss of SS mixed ash due to the formation of high-MP minerals. The SEM and FactSage calculations were also explained with the AFT change and their variation mechanisms. The result provided effective references for the AFT regulation during the co-combustion of biomass and solid waste.
Keywords: solid waste; sorghum straw; co-combustion; ash fusion characteristics; variation mechanisms (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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