Experimental study on hydrogen production by lignite gasification in supercritical water fluidized bed reactor using external recycle of liquid residual
Experimental study on hydrogen production by lignite gasification in supercritical water fluidized bed reactor using external recycle of liquid residual
复制标题
超临界水流化床反应器残液外循环褐煤气化制氢实验研究
DOI：
10.1016/j.enconman.2017.04.102
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发表时间：
2017-08-01
影响因子：
10.4
通讯作者：
Wang, Runyu
中科院分区：
文献类型：
--
作者：
Jin, Hui;Fan, Chao;Wang, Runyu
超临界水气化技术为高水分褐煤直接制取富氢产品提供了新的途径。通过对整个超临界水气化系统的能量分析，发现液态残渣的能量回收是提高系统能效的关键。此外，以往的研究结果表明，一些化合物，如苯酚和甲酸中所含的液体残留物可以回收利用，以提高氢气的产量。因此，在超临界水流化床系统中使用液体残余物的外部循环，以通过液体残余物的再气化来回收热能和化学能。此外，从系统中分离出的气体产物增强了气化过程。在该系统上进行了制氢实验，考察了操作温度470550 ℃、压力23-27 MPa、浓度3- 35wt%、循环流量0-70 g/min等条件对制氢的影响。实验结果表明，在530 ℃时，氢产率和碳气化效率分别达到32 mol/kg和82%。(C)2017爱思唯尔有限公司版权所有。
The technology of supercritical water gasification provides a novel way to convert high-moisture lignite to hydrogen-rich products directly. According to the energy analysis of the whole system for supercritical water gasification, the energy recovery of liquid residual played a key role in the energy efficiency improvement. Moreover, previous research findings showed that some chemical compounds such as phenols and formic acid contained in liquid residual can be recycled to increase the yield of hydrogen. Therefore, an external recycle of liquid residual was used in the supercritical water fluidized bed system to recover not only the heat energy but also the chemical energy by re-gasification of the liquid residual. Besides, the separation of gaseous products from the system enhanced the gasification process. Hydrogen production experiments were operated in this system and the influence of operating temperature 470550 C-omicron, pressure 23-27 MPa, concentration 3-35 wt% and cycling flow rate 0-70 g/min were studied. The experimental results showed that hydrogen yield and carbon gasification efficiency reached 32 mol/kg and 82%, respectively, at 530 C-omicron. (C) 2017 Elsevier Ltd. All rights reserved.