Supercritical water gasification of food waste: Effect of parameters on hydrogen production

Supercritical water gasification of food waste: Effect of parameters on hydrogen production
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食物垃圾的超临界水气化:参数对产氢的影响

DOI:
10.1016/j.ijhydene.2020.03.190
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发表时间:
2020-05
影响因子:
7.2
通讯作者:
Liu Weimin
Liu Weimin
中科院分区:
工程技术2区
文献类型:
--
作者:
Su Wei;Cai Changqing;Liu Ping;Lin Wei;Liang Baorui;Zhang Hui;Ma Zhiliang;Ma Hongzhi;Xing Yi;Liu Weimin

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餐厨垃圾是一类含丰富有机物的城市固体废物。氢具有高能量,可由有机废物的超临界水气化(SCWG)产生。本研究采用不同反应时间(20-60 min)、不同温度(400°C-450°C)、不同食品添加剂(NaOH、NaHCO3和NaCl)对食物垃圾进行气化,考察这些因素对合成气产率和组成的影响。结果表明,提高气化温度和气化时间可提高气化效率。此外,添加含Na+的食品添加剂可促进食物垃圾的SCWG。非催化实验得到的h2产率最高为2.0 mol/kg,总产气量为7.89 mol/kg。NaOH对食物垃圾超临界水处理的催化性能最好,产氢量最高,为12.73 mol/kg。研究结果表明,超临界水气化可作为一种高效的食物垃圾富氢气体处理技术。
Food waste is a type of municipal solid waste with abundant organic matter. Hydrogen contains high energy and can be produced by supercritical water gasification (SCWG) of organic waste. In this study, food waste was gasified at various reaction times (20–60 min) and temperatures (400 °C-450 °C) and with different food additives (NaOH, NaHCO3, and NaCl) to investigate the effects of these factors on syngas yield and composition. The results showed that the increase in gasification temperature and time improved gasification efficiency. Also, the addition of food additives with Na+promoted the SCWG of food waste. The highest H2yield obtained through non-catalytic experiments was 2.0 mol/kg, and the total gas yield was 7.89 mol/kg. NaOH demonstrated the best catalytic performance in SCWG of food waste, and the highest hydrogen production was 12.73 mol/kg. The results propose that supercritical water gasification could be a proficient technology for food waste to generate hydrogen-rich gas products.
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