Hydrogen production from the catalytic supercritical water gasification of process water generated from hydrothermal liquefaction of microalgae
Hydrogen production from the catalytic supercritical water gasification of process water generated from hydrothermal liquefaction of microalgae
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DOI：
10.1016/j.fuel.2015.10.088
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发表时间：
2016-02-15
期刊：
影响因子：
7.4
通讯作者：
Ross, A. B.
中科院分区：
文献类型：
--
作者：
Cherad, Ramzi;Onwudili, J. A.;Ross, A. B.
水热液化(HTL)和水热气化(HTG)的结合是提高能源回收和潜在的生物原料升级的一种选择。对普通小球藻HTL的产量和产物分布进行了研究。实现了藻类向生物原油的高转化率以及水相中剩余有机成分的近乎完全气化。在超临界水条件下，HTL的水相通过催化HTG进行升级，以最大限度地提高生物原油加氢处理的氢气产量。在有机物接近完全气化的情况下(类似于98%)，可以产生高产量的氢气(类似于30molH-2/kg藻类)。将产生的氢气量与生物原料完全加氢处理所需的氢气量进行比较。HTL生产的每克生物粗品经HTG最高可生产0.29g H-2。对水相的营养成分进行了分析，以确定营养物质恢复对藻类生长的适宜性。结果表明，HTL和HTG的成功整合产生了过剩的氢气，并维持了藻类生长的营养恢复。(C)2015年提交人。爱思唯尔有限公司出版。
The integration of hydrothermal liquefaction (HTL) and hydrothermal gasification (HTG) is an option for enhanced energy recovery and potential biocrude upgrading. The yields and product distribution obtained from the HTL of Chlorella vulgaris have been investigated. High conversion of algae to biocrude as well as near complete gasification of the remaining organic components in the aqueous phase was achieved. The aqueous phase from HTL was upgraded through catalytic HTG under supercritical water conditions to maximise hydrogen production for biocrude hydrotreating. High yields of hydrogen were produced (similar to 30 mol H-2/kg algae) with near complete gasification of the organics (similar to 98%). The amount of hydrogen produced was compared to the amounts needed for complete hydrotreating of the biocrude. A maximum of 0.29 g H-2 was produced through HTG per gram of biocrude produced by HTL. The nutrient content of the aqueous phase was analysed to determine suitability of nutrient recovery for algal growth. The results indicate the successful integration of HTL and HTG to produce excess hydrogen and maintain nutrient recovery for algal growth. (C) 2015 The Authors. Published by Elsevier Ltd.