从纤维素通过超临界水气化生产气工艺的建议,设计和成本分析
Taichi Masuda1, Naoki Ikesaka1, Yosuke Muranaka1
1Department of Chemical Engineering, Kyoto University Nishikyo Kyoto 615-8510 Japan tanabe@cheme.kyoto-u.ac.jp.
RSC advances
|October 18, 2023
概括
本研究详细介绍了使用超临界水气化从纤维素生产可再生的过程. 虽然目前面临经济挑战,但与其他生产技术相比,该方法的能源成本显著降低.
科学领域:
- 生物质转换生物质转换
- 可再生能源技术可再生能源技术
- 化学工程是化学工程的组成部分.
背景情况:
- 来自可再生资源的气生产正变得越来越重要.
- 超临界水气化 (SCWG) 为生物质转化提供了优势,包括高效率和减少预处理需求.
研究的目的:
- 通过使用SCWG技术通过葡萄糖进行纤维素衍生气生产的详细工艺设计.
- 评估拟议过程的经济可行性和能源效率.
主要方法:
- 使用了从纤维素中提取的葡萄糖的超临界水气化.
- 采用连续反应堆进行固体反应,并使用提取柱进行葡萄糖分离.
- 实施了两阶段的压力摆动吸附 (PSA) 工艺,用于高纯度的分离.
- 综合热交换可降低公用事业的整体成本.
主要成果:
- 通过热集成实现了显著的公用事业成本降低 ($0.020/mol-H2).
- 由于水和硫酸处理,该过程目前存在0.015/mol-H2的赤字.
- 计算的能源成本远低于传统的生产方法 (例如,蒸汽改造,水电解).
结论:
- 基于纤维素的绿色气生产方案表明,尽管目前的经济局限性,但它具有实际潜力.
- 为了提高经济效益,建议改进工艺,例如提高纤维素度和使用较低纯度的气.
- 显著降低的能源需求凸显了SCWG在可持续气发电方面的可行性.
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