Effect of Mg-additive and carrier gas in flue gas torrefaction and gasification: Fuel properties, kinetics and thermodynamic analysis

IF 9 1区工程技术 Q1 ENERGY & FUELS

Energy Pub Date : 2025-05-08 DOI:10.1016/j.energy.2025.136495

Xiaochao Zhu , Xiyue Sun , Beibei Yan , Donghao Hou , Songjiang Li , Shengquan Zhou , Guanyi Chen

{"title":"Effect of Mg-additive and carrier gas in flue gas torrefaction and gasification: Fuel properties, kinetics and thermodynamic analysis","authors":"Xiaochao Zhu , Xiyue Sun , Beibei Yan , Donghao Hou , Songjiang Li , Shengquan Zhou , Guanyi Chen","doi":"10.1016/j.energy.2025.136495","DOIUrl":null,"url":null,"abstract":"<div><div>Flue gas torrefaction (FGT) integrated with gasification based on Mg-additive (MgO-FGT-GS) is a promising biomass utilization approach. This study examined the influence of torrefaction atmosphere on the physicochemical characteristics, gasification products release, the kinetics and thermodynamics. MgO-FGT products exhibited the highest H/C ratio of 1.46. The HHV and energy density of torrefied products is 19.15 MJ/kg and 1.22. The optimum amount of O<sub>2</sub> and the maximum amount of CO<sub>2</sub> are the best for the improvement of fuel properties. Additionally, adjusting the flue gas composition controlled the composition of gasification products. The synergistic effect of FGT coupled with MgO enhances the release of combustible gas in the gasification stage. Kinetic and thermodynamic analyses indicated that torrefaction enhanced raw stability by eliminating hemicellulose. The destruction of cellulose by torrefaction improved gasification reactivity, and the Mg-additive catalysis of cellulose further improved reactivity. Higher O<sub>2</sub> and lower CO<sub>2</sub> content in flue gas exacerbated cellulose and hemicellulose destruction, detrimental to torrefaction. Overall, this research provides theoretical support for industrial applications of MgO-FGT-GS.</div></div>","PeriodicalId":11647,"journal":{"name":"Energy","volume":"328 ","pages":"Article 136495"},"PeriodicalIF":9.0000,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0360544225021371","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}

引用次数: 0

Abstract

Flue gas torrefaction (FGT) integrated with gasification based on Mg-additive (MgO-FGT-GS) is a promising biomass utilization approach. This study examined the influence of torrefaction atmosphere on the physicochemical characteristics, gasification products release, the kinetics and thermodynamics. MgO-FGT products exhibited the highest H/C ratio of 1.46. The HHV and energy density of torrefied products is 19.15 MJ/kg and 1.22. The optimum amount of O₂ and the maximum amount of CO₂ are the best for the improvement of fuel properties. Additionally, adjusting the flue gas composition controlled the composition of gasification products. The synergistic effect of FGT coupled with MgO enhances the release of combustible gas in the gasification stage. Kinetic and thermodynamic analyses indicated that torrefaction enhanced raw stability by eliminating hemicellulose. The destruction of cellulose by torrefaction improved gasification reactivity, and the Mg-additive catalysis of cellulose further improved reactivity. Higher O₂ and lower CO₂ content in flue gas exacerbated cellulose and hemicellulose destruction, detrimental to torrefaction. Overall, this research provides theoretical support for industrial applications of MgO-FGT-GS.

查看原文本刊更多论文

镁添加剂和载气对烟气焙烧和气化的影响：燃料特性、动力学和热力学分析

基于镁添加剂（MgO-FGT-GS）的烟气焙烧（FGT）与气化相结合是一种很有前途的生物质利用方法。研究了气化气氛对气化物化特性、产物释放、动力学和热力学的影响。MgO-FGT产品的H/C比最高，为1.46。固化产物的HHV和能量密度分别为19.15 MJ/kg和1.22 MJ/kg。最佳的O2用量和最大的CO2用量对燃料性能的改善效果最好。此外，调整烟气成分控制了气化产物的组成。FGT与MgO的协同作用增强了气化阶段可燃气体的释放。动力学和热力学分析表明，焙烧通过去除半纤维素提高了原料的稳定性。焙烧对纤维素的破坏提高了气化反应性，mg添加剂对纤维素的催化作用进一步提高了反应性。烟气中较高的O2和较低的CO2含量加剧了纤维素和半纤维素的破坏，不利于焙烧。总体而言，本研究为MgO-FGT-GS的工业应用提供了理论支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Energy 工程技术-能源与燃料

CiteScore

15.30

自引率

14.40%

发文量

审稿时长

14.2 weeks

期刊介绍： Energy is a multidisciplinary, international journal that publishes research and analysis in the field of energy engineering. Our aim is to become a leading peer-reviewed platform and a trusted source of information for energy-related topics. The journal covers a range of areas including mechanical engineering, thermal sciences, and energy analysis. We are particularly interested in research on energy modelling, prediction, integrated energy systems, planning, and management. Additionally, we welcome papers on energy conservation, efficiency, biomass and bioenergy, renewable energy, electricity supply and demand, energy storage, buildings, and economic and policy issues. These topics should align with our broader multidisciplinary focus.