生物炭碳稳定方法的比较分析以及对碳信用的影响
Sirjana Adhikari1, Ellen Moon2, Jorge Paz-Ferreiro3
1School of Engineering, Deakin University, Geelong, Victoria 3216, Australia; Centre for Sustainable Bioproducts, Deakin University, Geelong, Victoria 3216, Australia.
The Science of the total environment
|December 28, 2023
概括
对于碳信用来说至关重要的生物炭碳稳定性主要取决于原料类型,而不是生产方法. 像H:Corg这样的传统指标在评估各种样本的生物炭稳定性时可能不可靠.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 碳封存是一种碳封存技术.
背景情况:
- 生物炭是一种关键的负排放技术,其碳捕获潜力和碳信用估值取决于其稳定性.
- 目前生物炭碳稳定性的指标 (H:Corg,O:Corg) 是保守的,基于有限的数据,并没有广泛地比较各种生物炭类型.
- 原料和生产方法对生物炭稳定性的影响仍未得到充分研究.
研究的目的:
- 用多种仪器和衍生方法全面分析21种不同的生物炭样本的碳稳定性.
- 为了比较各种指标的有效性来评估生物炭碳的稳定性.
- 调查原料和热解技术对生物炭碳稳定性的影响.
主要方法:
- 分析了21个生物炭样本,使用各种原料和热解技术.
- 仪表方法和衍生指标的应用:生物炭碳半衰期,热稳定分数,氧化阻力 (R50) 和碳封存潜力 (CS).
- 传统指标 (H:Corg,O:Corg) 与其他稳定性指标的比较.
主要成果:
- 生物炭的碳稳定性主要受到原料类型的影响,碳信用潜力取决于生产技术 (简单与先进的热解) 的优先考虑.
- 在混合原料的简单热解生物炭中,生物炭碳稳定性和挥发性物质或固定碳含量之间没有发现相关性.
- 具有H:Corg < 0.4的生物炭在各方法中表明碳稳定性较低;然而,H:Corg与其他稳定性指标没有相关性,而非半衰期,O:Corg,固定碳,FTIR芳香峰值,R50和CS.
结论:
- 原料类型是控制生物炭碳稳定性的主要因素,影响其碳封存和信用的潜力.
- 像H:Corg这样的传统指标在评估生物炭稳定性方面可能不是普遍可靠的;替代方法显示出更好的相关性.
- 进一步的化和建模研究是必不可少的,以提高对生物炭稳定性评估的信心,以准确评估碳信用.
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