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Highly active and stable HF acid modified HZSM-5 supported Ni catalysts for steam reforming of toluene and biomass pyrolysis tar

机译:高活性稳定的HF酸改性HZSM-5支持的Ni催化剂,用于甲苯和生物质热解焦油的蒸汽重整

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摘要

This paper investigated the performance of HF modified HZSM-5 supported nickel catalysts (Ni/FZ5) in steam reforming of toluene (TSR) and biomass pyrolysis tar (BSR). The mesopores volume of support increased from 0.021 to 0.061 cm(3)/g with decreasing acid amount from 2.27 to 0.41 mmol/g after HF treatment. Catalysts with different Ni loadings were prepared and characterized. The Ni/FZ5 with Ni loading of 9 wt% possesses relatively large specific surface area (337 m(2)/g) and average pore size (2.91 nm), as well as small Ni particle size (23 nm) and high dispersion. In the process of TSR, 9Ni/FZ5 was kept above 70% for 7 h. Owing to the calculated lower apparent activation energy (30.76 KJ/mol), 9Ni/FZ5 exhibited the best performance in BSR at 650 degrees C, achieving the largest H-2 yield of 52.8 mmol/g and the highest selectivity of H-2 at 72.8%. Additionally, only 1.6 mg/g eetelyst of coke deposition was detected. Moreover, its high activity was still identified with excellent hydrothermal stability even after 7 times of regeneration. All findings suggest that 9Ni/FZ5 is a promising catalyst for biomass tar cracking.
机译:本文研究了HF改性HZSM-5负载镍催化剂(Ni / FZ5)在甲苯(TSR)和生物质热解焦油(BSR)中的蒸汽重整中的性能。中孔的载体体积从0.021至0.061cm(3)/ g增加,在HF处理后的2.27至0.41mmol / g的降低量降低。制备具有不同Ni载荷的催化剂并表征。 Ni / FZ5具有9wt%的Ni负载具有相对大的比表面积(337m(2)/ g)和平均孔径(2.91nm),以及小的Ni粒度(23nm)和高分散体。在TSR的过程中,9NI / FZ5保持在70%以上7小时。由于计算出的下表观活化能量(30.76kJ / mol),9ni / FZ5在650℃下表现出BSR中最佳性能,实现52.8mmol / g的最大H-2产率和H-2的最高选择性72.8%。另外,检测到仅1.6mg / g Eetely的焦炭沉积。此外,即使在再生7次后,它仍然鉴定其高活性以优异的水热稳定性。所有发现表明,9NI / FZ5是生物质焦油裂解的有希望的催化剂。

著录项

  • 来源
    《Energy Conversion & Management》 |2020年第5期|112799.1-112799.12|共12页
  • 作者单位

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ Xuzhou 221116 Jiangsu Peoples R China;

    China Univ Min & Technol Key Lab Coal Proc & Efficient Utilizat Minist Educ 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Modified HZSM-5; Catalytic steam reforming; Activation energy; Regeneration; Biomass tar cracking;

    机译:改性HZSM-5;催化蒸汽重整;活化能量;再生;生物质焦油开裂;

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