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首页> 外文期刊>Fuel >Organic salt-assisted pyrolysis for preparation of porous carbon from cellulose, hemicellulose and lignin: New insight from structure evolution
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Organic salt-assisted pyrolysis for preparation of porous carbon from cellulose, hemicellulose and lignin: New insight from structure evolution

机译：用于制备来自纤维素，半纤维素和木质素的多孔碳的有机盐辅助热解：结构演化的新洞察力

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摘要

Developing green, high efficient and precursor-universal pore tailoring approach is a major issue for biomassderived porous carbon (BPC). In this study, the unique effect of organic salt porogen (potassium acetate) was first elucidated through investigating the component and temperature-dependent structure evolution of BPC during pyrolysis-activation process. Hydrogen bonding with biomass char rather than melting would facilitate the dispersion of porogen. Potassium acetate would catalyze cracking of biopolymers (400 degrees C) into H-2, CO2, CO and CH4 etc. and lead to plentiful macropores by gas blowing. And it decomposed into potassium species that etch the char to form micropores. Differently, cellulose and hemicellulose char intermediates with abundant carbonyl incline to retain the porous structure. BPCs from cellulose and hemicellulose possess specific surface area (SSA) similar to 1700 m(2)/g with nano-passages and three-dimensional layer framework structure. While lignin-derived BPC performs equally high SSA but bulky microporous structure. Besides, carbon layer would form from acetate decomposition and deposited on the char surface thus lead to similar surface structure. This study provides a novel insight of interaction between biomass char intermediate and organic salt porogen, which may demonstrate a precursor-universal and high efficient approach for BPC preparation.
机译：开发绿色，高效和前兆 - 万能孔剪剪裁方法是生物索长多孔碳（BPC）的主要问题。在该研究中，首先通过研究热解 - 活化过程中BPC的组分和温度依赖性结构演进来阐明有机盐致孔原（乙酸钾）的独特效果。与生物质焦炭而不是熔化的氢键将有助于致孔的分散。乙酸钾将催化生物聚合物（＆，400℃）的裂化，进入H-2，CO 2，CO和CH 4等，并通过气体吹气导致大量的大型宏粒。它分解成蚀刻焦炭以形成微孔的钾物种。不同的方式，纤维素和半纤维素炭与丰富的羰基斜槽中间体以保留多孔结构。来自纤维素和半纤维素的BPC具有与具有纳米通道和三维层框架结构的1700μm（2）/ g类似的比表面积（SSA）。虽然木质素衍生的BPC进行同样高的SSA但庞大的微孔结构。此外，碳层将从醋酸盐分解形成并沉积在炭表面上，因此导致相似的表面结构。该研究提供了生物量焦焦中间体和有机盐致孔原相互作用的新颖洞察力，这可能证明了BPC制剂的前体通用和高效方法。

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  • 来源
    《Fuel》 |2021年第1期|120185.1-120185.10|共10页
  • 作者

    Xia Mingwei; Chen Wei; Wu Jing; Chen Yingquan; Yang Haiping; Chen Xu; Zhu Danchen; Chen Hanping;

  • 作者单位

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Porous carbon; Potassium acetate; Cellulose; Lignin; Hemicellulose; Hydrogen bonding;

    机译：多孔碳;醋酸钾;纤维素;木质素;半纤维素;氢键;

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