Enhanced waste-to-fuel gas conversion via co-pyrolysis of purified terephthalic acid sludge ash and phoenix tree’s leaves

IF 6.7 2区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Analytical and Applied Pyrolysis Pub Date : 2026-05-01 Epub Date: 2026-01-21 DOI:10.1016/j.jaap.2026.107639

Zhou Yang , Hanchuan Liu , Yongjuan Zhao , Shiyi Ye , Yulong Liang , Hongyu Zhao , Xinxin Xing , Xiaoyuan Wang , Yinfeng Wang

{"title":"Enhanced waste-to-fuel gas conversion via co-pyrolysis of purified terephthalic acid sludge ash and phoenix tree’s leaves","authors":"Zhou Yang , Hanchuan Liu , Yongjuan Zhao , Shiyi Ye , Yulong Liang , Hongyu Zhao , Xinxin Xing , Xiaoyuan Wang , Yinfeng Wang","doi":"10.1016/j.jaap.2026.107639","DOIUrl":null,"url":null,"abstract":"<div><div>Purified terephthalic acid (PTA) production generates substantial sludge, which is characterized by the high content of metal elements (such as Ca, Co and Mn) in the ash, classifying it as a hazardous organic waste. This study comprehensively investigated the synergistic pyrolysis of PTA sludge ash (PTASA) and phoenix tree’s leaves (PTL) for syngas production. Through systematic characterisation of the physicochemical properties of PTASA and PTL, combined with thermal degradation behavior analysis and pyrolysis experiments, the aim was to determine the optimal conditions for producing high-value gas. The results showed that when the mixing ratio of PS850 (PTASA calcinated at 850℃) reached 30 %, the values of total mass loss (TML) and comprehensive pyrolysis index (CPI) as well as the quality of syngas have reached the best level. In addition, compared with PTL mono-pyrolysis, adding PTASA could increase the total volatile products by 16.4 %, owing to the cooperative pyrolysis for C<img>O, C<img>C and C-O groups. Moreover, in-situ co-pyrolysis proved superior to ex-situ conditions for hydrogen-rich gas production. The PTASA calcined at 750°C(PS750) exhibited the most pronounced catalytic effect with stable microstructure and excellent metal mineral composition, and the total effective gas (CO + H₂ + CH₄) yields of 442.52 mL/g, which was 4 % higher than that of the co-pyrolysis process of PS850 and PTL. This study provides significant insights for expanding the high-value utilization of solid waste resources.</div></div>","PeriodicalId":345,"journal":{"name":"Journal of Analytical and Applied Pyrolysis","volume":"195 ","pages":"Article 107639"},"PeriodicalIF":6.7000,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Analytical and Applied Pyrolysis","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S016523702600046X","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/1/21 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Purified terephthalic acid (PTA) production generates substantial sludge, which is characterized by the high content of metal elements (such as Ca, Co and Mn) in the ash, classifying it as a hazardous organic waste. This study comprehensively investigated the synergistic pyrolysis of PTA sludge ash (PTASA) and phoenix tree’s leaves (PTL) for syngas production. Through systematic characterisation of the physicochemical properties of PTASA and PTL, combined with thermal degradation behavior analysis and pyrolysis experiments, the aim was to determine the optimal conditions for producing high-value gas. The results showed that when the mixing ratio of PS850 (PTASA calcinated at 850℃) reached 30 %, the values of total mass loss (TML) and comprehensive pyrolysis index (CPI) as well as the quality of syngas have reached the best level. In addition, compared with PTL mono-pyrolysis, adding PTASA could increase the total volatile products by 16.4 %, owing to the cooperative pyrolysis for CO, CC and C-O groups. Moreover, in-situ co-pyrolysis proved superior to ex-situ conditions for hydrogen-rich gas production. The PTASA calcined at 750°C(PS750) exhibited the most pronounced catalytic effect with stable microstructure and excellent metal mineral composition, and the total effective gas (CO + H₂ + CH₄) yields of 442.52 mL/g, which was 4 % higher than that of the co-pyrolysis process of PS850 and PTL. This study provides significant insights for expanding the high-value utilization of solid waste resources.

查看原文本刊更多论文

利用纯化对苯二甲酸污泥灰和梧桐树叶共热解提高废物制气转化率

纯化对苯二甲酸（PTA）生产产生大量污泥，其特点是灰分中金属元素（如Ca、Co和Mn）含量高，属于危险有机废物。本研究对PTA污泥灰（PTASA）和凤凰叶（PTL）协同热解制合成气进行了全面研究。通过系统表征PTASA和PTL的理化性质，结合热降解行为分析和热解实验，确定高值气的最佳产气条件。结果表明，当PS850（850℃煅烧的PTASA）的掺量为30 %时，其总失重（TML）、综合热解指数（CPI）及合成气质量均达到最佳水平。此外，由于CO、CC和C-O基团的协同热解，与PTL单热解相比，PTASA的加入可使总挥发产物增加16.4 %。此外，原位共热解条件优于非原位共热解条件生产富氢气体。750℃煅烧的PTASA （PS750）具有稳定的微观结构和优良的金属矿物组成，催化效果最为显著，总有效气体（CO + H₂+ CH₄）产率为442.52 mL/g，比PS850和PTL共热解的产率提高了4. %。本研究为扩大固体废物资源的高价值利用提供了重要的见解。

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

Journal of Analytical and Applied Pyrolysis 化学-分析化学

CiteScore

9.10

自引率

11.70%

发文量

340

审稿时长

44 days

期刊介绍： The Journal of Analytical and Applied Pyrolysis (JAAP) is devoted to the publication of papers dealing with innovative applications of pyrolysis processes, the characterization of products related to pyrolysis reactions, and investigations of reaction mechanism. To be considered by JAAP, a manuscript should present significant progress in these topics. The novelty must be satisfactorily argued in the cover letter. A manuscript with a cover letter to the editor not addressing the novelty is likely to be rejected without review.