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由二次稳定辅助的肥料衍生水电的碳封存潜力

Cordel G Bever¹, Charles J Coronella¹

¹Chemical and Materials Engineering Department, University of Nevada, Reno, Reno, Nevada 89557, United States.

ACS sustainable chemistry & engineering

|April 12, 2024

概括

水热碳化 (HTC) 之后的热解会为土壤碳封存创造一个优越的碳. 这种增强的炭提供了比单独的HTC或热解更好的碳产量和碳含量.

科学领域:

农业科学农业科学
环境科学环境科学
材料科学是一种材料科学.

背景情况:

水热碳化 (HTC) 将潮湿的有机材料转化为富含碳的固体.
来自热解的焦炭在土壤中是稳定的,用于碳封存,但热解对于肥料等湿生物质来说是昂贵的.
来自HTC的焦炭显示出肥料碳捕获的潜力,尽管比热解焦炭少.

研究的目的:

为了评估由HTC生产的焦炭与热解相结合,用于长期的土壤碳捕获.
为了研究酸催化HTC跟随热解对煤炭性质的影响.
为了比较组合的HTC-热解炭与单个过程的封存潜力.

主要方法:

使用水热碳化 (HTC) 和热解,单独和顺序地生产焦炭.
在HTC步骤中利用酸催化.
分析煤炭的特性,包括碳产量,碳含量和原子O/C比.

主要成果:

一个两步的HTC-热解工艺显著改善了土壤碳捕获的煤炭特性.
酸催化HTC,然后再进行热解,产生了13%更高的碳产量和51%更高的碳含量.
结合的过程导致原子O/C比率比传统的热解小64%.

结论:

与单步方法相比,顺序的HTC-热解工艺提供了增强的碳封存潜力.
在HTC中的酸催化进一步优化了煤炭特性,以稳定地土碳储存.
这种方法为管理肥料和封存土壤中的碳提供了一个有前途的方法.

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