Reflectance as an indicator of biochar permanence

IF 5.6 2区工程技术 Q2 ENERGY & FUELS

International Journal of Coal Geology Pub Date : 2025-05-10 DOI:10.1016/j.coal.2025.104809

Maria Mastalerz , Agnieszka Drobniak , Bei Liu , Peter E. Sauer

{"title":"Reflectance as an indicator of biochar permanence","authors":"Maria Mastalerz , Agnieszka Drobniak , Bei Liu , Peter E. Sauer","doi":"10.1016/j.coal.2025.104809","DOIUrl":null,"url":null,"abstract":"<div><div>Biochar, a carbon-rich product of biomass pyrolysis, holds considerable potential for carbon sequestration, soil amendment, and environmental remediation. Its effective application, however, hinges on understanding biochar permanence and on employing robust methodologies to reliably assess its stability and reactivity.</div><div>This study investigates the relationship between reflectance and the chemical composition (elemental ratios and organic functional groups) of biochar produced from sycamore wood, wheat straw, and peanut shells across well-controlled pyrolysis temperatures ranging from 300 °C to 700 °C, aiming to assess the potential of biochar reflectance as an indicator of biochar permanence.</div><div>The results demonstrate strong correlations between biochar reflectance and H/C and O/C molar ratios and show that the reflectance increases systematically with pyrolysis temperature. A strong correlation between the elemental O/C ratio and the FTIR-derived ratio of oxygenated groups to aromatic carbon across different pyrolysis temperatures provides additional valuable insights for predicting biochar stability.</div><div>The findings point to pyrolysis temperature as the dominant factor influencing biochar longevity and reinforce the suggestion that biochars with reflectance values above 2.0 % are non-reactive and are expected to be stable in the environment for a very long time. The results highlight biochar reflectance as a rapid and effective proxy for predicting biochar permanence, supporting its utility in carbon sequestration and environmental management.</div></div>","PeriodicalId":13864,"journal":{"name":"International Journal of Coal Geology","volume":"306 ","pages":"Article 104809"},"PeriodicalIF":5.6000,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Coal Geology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0166516225001260","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

Biochar, a carbon-rich product of biomass pyrolysis, holds considerable potential for carbon sequestration, soil amendment, and environmental remediation. Its effective application, however, hinges on understanding biochar permanence and on employing robust methodologies to reliably assess its stability and reactivity.

This study investigates the relationship between reflectance and the chemical composition (elemental ratios and organic functional groups) of biochar produced from sycamore wood, wheat straw, and peanut shells across well-controlled pyrolysis temperatures ranging from 300 °C to 700 °C, aiming to assess the potential of biochar reflectance as an indicator of biochar permanence.

The results demonstrate strong correlations between biochar reflectance and H/C and O/C molar ratios and show that the reflectance increases systematically with pyrolysis temperature. A strong correlation between the elemental O/C ratio and the FTIR-derived ratio of oxygenated groups to aromatic carbon across different pyrolysis temperatures provides additional valuable insights for predicting biochar stability.

The findings point to pyrolysis temperature as the dominant factor influencing biochar longevity and reinforce the suggestion that biochars with reflectance values above 2.0 % are non-reactive and are expected to be stable in the environment for a very long time. The results highlight biochar reflectance as a rapid and effective proxy for predicting biochar permanence, supporting its utility in carbon sequestration and environmental management.

查看原文本刊更多论文

反射率作为生物炭持久性的指标

生物炭是一种富含碳的生物质热解产物，在固碳、土壤修复和环境修复方面具有相当大的潜力。然而，它的有效应用取决于对生物炭持久性的理解，以及采用可靠的方法来可靠地评估其稳定性和反应性。本研究研究了在300 ~ 700℃的热解温度范围内，由梧桐木、麦秸和花生壳制成的生物炭的反射率与化学成分（元素比和有机功能基团）之间的关系，旨在评估生物炭反射率作为生物炭持久性指标的潜力。结果表明，生物炭的反射率与H/C和O/C摩尔比之间存在较强的相关性，且反射率随热解温度的升高而有系统地增大。元素O/C比值与ftir衍生的含氧基团与芳香族碳比值在不同热解温度下的强相关性为预测生物炭的稳定性提供了额外的有价值的见解。研究结果表明，热解温度是影响生物炭寿命的主要因素，并进一步表明反射率高于2.0%的生物炭是非活性的，并且有望在很长一段时间内保持稳定。研究结果表明，生物炭反射率是预测生物炭持久性的快速有效指标，支持其在碳固存和环境管理中的应用。

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

International Journal of Coal Geology 工程技术-地球科学综合

CiteScore

11.00

自引率

14.30%

发文量

145

审稿时长

38 days

期刊介绍： The International Journal of Coal Geology deals with fundamental and applied aspects of the geology and petrology of coal, oil/gas source rocks and shale gas resources. The journal aims to advance the exploration, exploitation and utilization of these resources, and to stimulate environmental awareness as well as advancement of engineering for effective resource management.