{"title":"Study on interaction mechanism of steam coupling biomass sludge gasification to syngas with pickling sludge as oxygen carrier","authors":"Shuanghui Liu, Fangmin Chen, Feng Duan, Lihui Zhang","doi":"10.1016/j.joei.2024.101810","DOIUrl":null,"url":null,"abstract":"<div><p>A process of producing hydrogen-rich syngas by chemical looping steam gasification is proposed, using pickling sludge (PS) as the oxygen carrier and paper-making sludge(PMS) along with municipal sludge(MS) as the fuel. The reaction characteristics of producing hydrogen-rich syngas through the gasification of PMS and MS were studied. The effects of temperature, steam flow rate and the blended ratio of PS on carbon conversion rate and gasification reaction efficiency were discussed, and the migration mechanisms of the main elements were explained. The results show that FeF<sub>3</sub> in PS exhibits stronger activity than conventional Fe<sub>2</sub>O<sub>3</sub> in catalyzing the gasification of PMS and MS at high temperature. With the blended mass ratio of 1:1 of PS, the carbon conversion rate of PMS and MS was increased by 11.8 % and 42.5 %, and the gasification efficiency was increased by 11.1 % and 25.85 %. The Fe<sup>3+</sup> in PS catalyzed the cleavage of C-H bonds in biomass sludge, and Fe<sup>3+</sup> was reduced to form the intermediate product FeCr<sub>2</sub>O<sub>4</sub> with tar cracking function. After the gasification reaction, the Fe in PS was completely converted to Fe<sub>3</sub>O<sub>4</sub> under the action of MS, while the CaO in PMS promoted the valence cycle of Fe to some extent, resulting in partial Fe being fully cycled to Fe<sup>3+</sup> to form γFe<sub>2</sub>O<sub>3</sub>. In addition, the CaO can fix the F element in PS to form CaF<sub>2</sub>, thus reducing the environmental hazard.</p></div>","PeriodicalId":17287,"journal":{"name":"Journal of The Energy Institute","volume":"117 ","pages":"Article 101810"},"PeriodicalIF":5.6000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Energy Institute","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1743967124002885","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
A process of producing hydrogen-rich syngas by chemical looping steam gasification is proposed, using pickling sludge (PS) as the oxygen carrier and paper-making sludge(PMS) along with municipal sludge(MS) as the fuel. The reaction characteristics of producing hydrogen-rich syngas through the gasification of PMS and MS were studied. The effects of temperature, steam flow rate and the blended ratio of PS on carbon conversion rate and gasification reaction efficiency were discussed, and the migration mechanisms of the main elements were explained. The results show that FeF3 in PS exhibits stronger activity than conventional Fe2O3 in catalyzing the gasification of PMS and MS at high temperature. With the blended mass ratio of 1:1 of PS, the carbon conversion rate of PMS and MS was increased by 11.8 % and 42.5 %, and the gasification efficiency was increased by 11.1 % and 25.85 %. The Fe3+ in PS catalyzed the cleavage of C-H bonds in biomass sludge, and Fe3+ was reduced to form the intermediate product FeCr2O4 with tar cracking function. After the gasification reaction, the Fe in PS was completely converted to Fe3O4 under the action of MS, while the CaO in PMS promoted the valence cycle of Fe to some extent, resulting in partial Fe being fully cycled to Fe3+ to form γFe2O3. In addition, the CaO can fix the F element in PS to form CaF2, thus reducing the environmental hazard.
期刊介绍:
The Journal of the Energy Institute provides peer reviewed coverage of original high quality research on energy, engineering and technology.The coverage is broad and the main areas of interest include:
Combustion engineering and associated technologies; process heating; power generation; engines and propulsion; emissions and environmental pollution control; clean coal technologies; carbon abatement technologies
Emissions and environmental pollution control; safety and hazards;
Clean coal technologies; carbon abatement technologies, including carbon capture and storage, CCS;
Petroleum engineering and fuel quality, including storage and transport
Alternative energy sources; biomass utilisation and biomass conversion technologies; energy from waste, incineration and recycling
Energy conversion, energy recovery and energy efficiency; space heating, fuel cells, heat pumps and cooling systems
Energy storage
The journal''s coverage reflects changes in energy technology that result from the transition to more efficient energy production and end use together with reduced carbon emission.