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首页> 外文期刊>Fuel >Pyrolysis of hydrothermal liquefaction algal biochar for hydrogen production in a membrane reactor
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Pyrolysis of hydrothermal liquefaction algal biochar for hydrogen production in a membrane reactor

机译：膜反应器中热液化藻类生物炭的热解以制氢

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摘要

Algal biomass has recently emerged as a sustainable feedstock that can be converted to liquid fuels and other energy products. Hydrothermal liquefaction (HTL) is considered one of the most efficient thermochemical conversion techniques to produce high-quality biocrude oil that can be upgraded into a variety of liquid fuels. However, failure to identify practical uses for the HTL residual solids (biochar) could make the process economically less attractive especially with low lipid algae. This work investigates the conversion of HTL biochar of microalgae Galdieria sulphuraria to hydrogen under pyrolysis conditions in a membrane reactor capable of selectively separating hydrogen from the reaction zone. HTL biochar pyrolysis was first investigated using thermogravimetric analysis experiments and fixed bed reactor configuration. Batch membrane reactor pyrolysis experiments were then carried out using Pd77Ag23 hydrogen-selective membrane. The involvement of a Pd77Ag23 membrane in the reactor during the pyrolysis of biochar results in the recovery of hydrogen in the permeate stream (similar to 2 times the hydrogen remaining in the retentate) and further facilitates the conversion of biochar to gaseous fuels. The retentate stream shows reduced CO and CO2 as well as increased CH4 content compared to pyrolysis conditions with no membrane.
机译：藻类生物质最近已成为一种可持续的原料，可以转化为液体燃料和其他能源产品。水热液化（HTL）被认为是生产高品质生物原油的最有效的热化学转化技术之一，可以将其升级为多种液体燃料。但是，无法确定HTL残余固体（生物炭）的实际用途可能会使该方法在经济上不那么有吸引力，尤其是对于低脂藻类而言。这项工作研究了在能够选择性地从反应区中分离出氢的膜式反应器中，在热解条件下，微藻白僵菌的HTL生物炭向氢的转化。首先使用热重分析实验和固定床反应器配置研究了HTL生物炭热解。然后使用Pd77Ag23氢选择性膜进行间歇式膜反应器热解实验。在生物炭的热解过程中，反应器中Pd77Ag23膜的参与导致渗透液流中氢的回收（大约是保留在保留物中的氢的2倍），并进一步促进了生物炭向气体燃料的转化。与没有膜的热解条件相比，截留物流显示出减少的CO和CO2以及增加的CH4含量。

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  • 来源
    《Fuel》 |2020年第1期|116935.1-116935.8|共8页
  • 作者

  • 作者单位

    Suez Univ Fac Petr & Min Engn Suez Egypt|Arizona State Univ Sch Engn Matter Transport & Energy Tempe AZ 85287 USA;

    Arizona State Univ Sch Engn Matter Transport & Energy Tempe AZ 85287 USA;

  • 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

    Hydrothermal liquefaction; Biochar pyrolysis; Galdieria sulphuraria; Hydrogen separation; Pd77Ag23 membrane;

    机译：水热液化;生物炭热解;硫杆菌氢分离;Pd77Ag23膜;

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