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One-step synthesis of biochar-supported potassium-iron catalyst for catalytic cracking of biomass pyrolysis tar

机译：生物质热解焦油催化破裂的生物炭支撑钾 - 铁催化剂的一步合成

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摘要

In this work, K-Fe bimetallic catalyst supported on porous biomass char was synthesized via a one-step synthesis method by pyrolysis of biomass (peanut shells) after impregnation of a small amount of potassium ferrate (PSC-K2FeO4), and was evaluated for the cracking of biomass pyrolysis tar. Control experiments using the pure char (PSC) and char-supported catalysts after impregnation of KOH (PSC-KOH) and FeCl3 (PSC-FeCl3) were also performed for comparison. The as-prepared PSC-K2FeO4 possessed a porous structure with the dispersion of particles/clusters of Fe metal, K2CO3 and KFeO2 on the char support. Tar cracking experiments showed that the PSC-K2FeO4 exhibited excellent catalytic activity on the cracking of biomass pyrolysis tar in the temperature range of 600-800 degrees C, and the obtained tar conversion efficiencies were obviously higher than that in the control experiments, particularly at relatively lower temperatures (600 and 700 degrees C). The yields of combustible gas compounds including CO, H-2 and CH4 increased significantly using PSCK2FeO4 as the catalyst due to the enhanced tar cracking and reforming reactions. The porous structure and the active crystal structures of the spent catalyst were well retained, indicating the potential for efficient and long-term utilization of the catalyst in tar cracking. PSC-K2FeO4 exhibited excellent reusability during the five times reuse under the same conditions without regeneration, which showed almost no obvious decrease in the tar conversion efficiency and gas yields. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
机译：在这项工作中，通过在浸渍少量铁酸钾（PSC-K2FeO 4）后，通过一步合成法负载在多孔生物量焦炭上的K-Fe Bimetallic催化剂，并评价生物质热解焦油的破裂。还进行了使用纯Char（PSC）和炭负载催化剂在浸渍KOH（PSC-KOH）和FECL3（PSC-FECL3）后的控制实验进行比较。制备的PSC-k2FeO4具有多孔结构，其分散在炭载体上的Fe金属，K 2 CO 3和KFeO 2的颗粒/簇。焦油开裂实验表明，PSC-K2FeO4在600-800℃的温度范围内表现出优异的催化活性，在600-800℃的温度范围内，所得焦油​​转化效率明显高于对照实验中的焦油转化效率，特别是相对较低的温度（600和700℃）。包括CO，H-2和CH4的可燃气体化合物的产率随着增强的焦油开裂和重整反应而作为催化剂，显着使用PSCK2FeO 4显着增加。花催化剂的多孔结构和活性晶体结构良好地保留，表明催化剂在焦油裂解中有效和长期利用的可能性。 PSC-K2FeO4在没有再生的情况下在相同条件下的五次重用期间表现出优异的可重用性，这表明焦油转化效率和气体产量几乎没有明显降低。 （c）2020氢能源出版物LLC。 elsevier有限公司出版。保留所有权利。

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  • 来源
    《International journal of hydrogen energy》 |2020年第33期|16398-16408|共11页
  • 作者

    Guo Feiqiang; Liang Shuang; Jia Xiaopeng; Peng Kuangye; Jiang Xiaochen; Qian Lin;

  • 作者单位

    China Univ Min & Technol Jiangsu Prov Engn Lab High Efficient Energy Stora Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Elect & Power Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Jiangsu Prov Engn Lab High Efficient Energy Stora Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Elect & Power Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Jiangsu Prov Engn Lab High Efficient Energy Stora Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Elect & Power Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Jiangsu Prov Engn Lab High Efficient Energy Stora Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Elect & Power Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Jiangsu Prov Engn Lab High Efficient Energy Stora Xuzhou 221116 Jiangsu Peoples R China|China Univ Min & Technol Sch Elect & Power Engn Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Sch Elect & Power Engn Xuzhou 221116 Jiangsu Peoples R China;

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

    Peanut shell; Biochar; Tar cracking; Catalytic reforming;

    机译：花生壳;生物炭;焦油开裂;催化重整;

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