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生物炭通过同样的热解过程中产生的CO2被激活,并通过CaO在现场被捕获

Mengjiao Fan¹, Yuewen Shao¹, Chao Li¹

¹School of Material Science and Engineering, University of Jinan, Jinan, 250022, P. R. China. Xun.Hu@outlook.com.

Chemical communications (Cambridge, England)

|December 6, 2024

概括

这项研究建议在柳枝热解过程中将二氧化碳 (CO2) 转化为碳酸 (CaCO3). 然后,CaCO3在更高的温度下激活生物炭,提供一种可持续的方法.

科学领域:

化学工程是化学工程的重要组成部分.
环境科学环境科学
材料科学材料科学材料科学

背景情况:

热解是将生物质转化为有价值产品的关键热化学过程.
二氧化碳 (CO2) 的捕获和利用仍然是缓解气候变化的关键挑战.
从生物质热解中获得的生物炭在碳封存和材料科学中具有潜在的应用.

研究的目的:

提出一种用于生物质热解过程中的*in situ*二氧化碳 (CO2) 捕获的新方法.
调查氧化 (CaO) 用于以碳酸 (CaCO3) 的形式封存二氧化碳的使用.
通过在高温下使用释放的二氧化碳和二氧化来探索生物炭的后续激活.

主要方法:

柳枝 (WB) 在氧化物 (CaO) 的存在下在600°C下被烧解.
二氧化碳 (CO2) 被捕获 *in situ* 作为碳酸 (CaCO3).
由此产生的CaCO3和生物炭在900°C进行了第二次热解步骤以激活.

主要成果:

在WB热解过程中成功地将二氧化碳作为CaCO3捕获.
在900°C时,CaCO3分解,释放出CO2和CaO.
这一过程使得使用释放的二氧化碳和二氧化来激活生物炭.

结论:

在生物质热解过程中证明了一种可行的二氧化碳捕获和利用方法.
拟议的方法为生产具有增强性质的活性生物炭提供了一条途径.
这一综合过程有助于可持续的碳管理和增值生物炭生产.

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