Integrated CO2-hydrothermal carbonization and high temperature steam gasification of bamboo feedstock: A comprehensive experimental study

Advances in Bamboo Science Pub Date : 2024-02-01 DOI:10.1016/j.bamboo.2024.100060

Hong Nam Nguyen

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Abstract

This study investigated an integrated CO₂-hydrothermal carbonization (CO₂-HTC) and steam gasification of bamboo feedstock, an abundant biomass in Vietnam. Bamboo underwent CO₂-HTC at 240 °C under 100% CO₂ atmosphere with a biomass-to-water ratio of 1:4 and a residence time of 60 min. The resulting hydrochar served as feedstock for steam gasification at 900 °C under an atmosphere of 40% H₂O and 60% N₂. A parallel experiment using raw bamboo provided a basis for comparison. Results indicate notable enhancements in fixed carbon content, bulk density, and higher heating value of bamboo subsequent to CO₂-HTC. The CO₂-HTC bamboo displayed a higher maximum decomposition rate. Its char also showed quicker conversion, enhancing gasification efficiency. A syngas richer in both H₂ and CO by 2% was also produced with CO₂-HTC bamboo compared to the raw bamboo. The observed improvements in gasification performance suggest promising avenues for the more effective and sustainable utilization of bamboo in energy production.

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竹原料的二氧化碳热碳化和高温蒸汽气化一体化：综合实验研究

本研究调查了越南丰富的生物质--竹子原料的二氧化碳热碳化（CO2-HTC）和蒸汽气化综合工艺。竹子在 240 °C、100% CO2 气氛下进行 CO2-HTC，生物质与水的比例为 1:4，停留时间为 60 分钟。生成的水炭可作为原料，在 900 °C 的温度下，在 40% H2O 和 60% N2 的气氛中进行蒸汽气化。使用原竹进行的平行实验提供了比较的基础。结果表明，在 CO2-HTC 之后，竹子的固定碳含量、体积密度和热值都有显著提高。CO2-HTC 竹材的最大分解率更高。竹炭的转化速度也更快，从而提高了气化效率。与原竹材相比，CO2-HTC 竹材产生的合成气中 H2 和 CO 的含量均高出 2%。所观察到的气化性能改善表明，在能源生产中更有效、更可持续地利用竹子是一条大有可为的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Bamboo Science

CiteScore

0.90

自引率

0.00%

发文量