Controlling product selectivity and residual carbon behavior in biomass pyrolysis via pulse-structured joule heating

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-09-16 DOI:10.1016/j.psep.2025.107880

Yang Liu , Ruming Pan , Renaud Ansart , Chenxu Zhong , Yue Niu , Hongdi Yu , Fawei Lin , Gérald Debenest

{"title":"Controlling product selectivity and residual carbon behavior in biomass pyrolysis via pulse-structured joule heating","authors":"Yang Liu , Ruming Pan , Renaud Ansart , Chenxu Zhong , Yue Niu , Hongdi Yu , Fawei Lin , Gérald Debenest","doi":"10.1016/j.psep.2025.107880","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates biomass pyrolysis driven by Rapid Pulse Joule Heating (RPH), examining the effects of temperature (600 °C, 800 °C), pressure (atmospheric, vacuum), total on-time (5 s, 10 s), pulse number (1, 2, 4), and additives (steam and activated carbon). Results show that gas yield and conversion are highly dependent on temperature and pulse structure. At 600 °C, increasing pulse number reduced tar cracking; at 800 °C, it enhanced stepwise tar conversion and syngas production. Steam promoted tar volatilization and reforming under low pulse frequency, but weakened cumulative cracking under high frequency. Activated carbon (AC) further modified product distribution and carbon structure. Carbon nanotubes (CNTs) were observed under dry conditions with AC, while steam increased gas production but inhibited CNT formation. TPO analysis showed that AC enhanced the order and thermal stability of residual carbon. Overall, the results reveal a strong coupling among heating mode, atmosphere, and additives, and establish a synergistic pathway of “steam–activated carbon–intermediate retention–stepwise cracking”. This work provides mechanistic insight and experimental support for controlling product selectivity in fast pyrolysis systems based on RPH.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"203 ","pages":"Article 107880"},"PeriodicalIF":7.8000,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Process Safety and Environmental Protection","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0957582025011474","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study investigates biomass pyrolysis driven by Rapid Pulse Joule Heating (RPH), examining the effects of temperature (600 °C, 800 °C), pressure (atmospheric, vacuum), total on-time (5 s, 10 s), pulse number (1, 2, 4), and additives (steam and activated carbon). Results show that gas yield and conversion are highly dependent on temperature and pulse structure. At 600 °C, increasing pulse number reduced tar cracking; at 800 °C, it enhanced stepwise tar conversion and syngas production. Steam promoted tar volatilization and reforming under low pulse frequency, but weakened cumulative cracking under high frequency. Activated carbon (AC) further modified product distribution and carbon structure. Carbon nanotubes (CNTs) were observed under dry conditions with AC, while steam increased gas production but inhibited CNT formation. TPO analysis showed that AC enhanced the order and thermal stability of residual carbon. Overall, the results reveal a strong coupling among heating mode, atmosphere, and additives, and establish a synergistic pathway of “steam–activated carbon–intermediate retention–stepwise cracking”. This work provides mechanistic insight and experimental support for controlling product selectivity in fast pyrolysis systems based on RPH.

查看原文本刊更多论文

利用脉冲结构焦耳加热控制生物质热解过程中产物选择性和残碳行为

本研究研究了快速脉冲焦耳加热（RPH）驱动的生物质热解，考察了温度（600°C, 800°C），压力（大气，真空），总启动时间（5 s, 10 s），脉冲数（1,2,4）和添加剂（蒸汽和活性炭）的影响。结果表明，气体产率和转化率高度依赖于温度和脉冲结构。在600℃时，增加脉冲数可减少焦油裂解；在800°C时，它提高了焦油的逐步转化和合成气的生产。蒸汽在低脉冲频率下促进焦油挥发重整，在高脉冲频率下减弱累积裂解。活性炭（AC）进一步改变了产品的分布和碳结构。在干燥条件下观察到碳纳米管（CNTs），而蒸汽增加了气体产量，但抑制了碳纳米管的形成。TPO分析表明，AC提高了残余碳的有序度和热稳定性。总体而言，研究结果揭示了加热方式、气氛和添加剂之间的强耦合关系，并建立了“蒸汽-活性炭-中间保留-逐步裂解”的协同路径。这项工作为基于RPH的快速热解系统的产物选择性控制提供了机理和实验支持。

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

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.