An Environmental Analysis of Bio-H2 Production Introducing the 2-step PSA and Waste Heat Recovery
An Environmental Analysis of Bio-H2 Production Introducing the 2-step PSA and Waste Heat Recovery
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DOI：
10.3775/jie.99.129
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发表时间：
2020-09
影响因子：
0.2
通讯作者：
H. Nakayama;Mitsuo Kameyama;Y. Long;K. Dowaki
中科院分区：
文献类型：
--
作者：
H. Nakayama;Mitsuo Kameyama;Y. Long;K. Dowaki
Hydrogen (H 2 ) is expected to be one of the most promising secondary energy resources that can contribute to the mitigation of global warming. H 2 can be synthesized from biomass feedstock as Bio-H 2 , which can contribute to greenhouse gas emission mitigation. However, the low energy density of Biomass limits the collection of the feedstock based on the life-cycle assessment methodology. Furthermore, for successful operation, small-scale Bio-H 2 plants must be used. Thus, a Bio-H 2 plant faces two challenges: 1) the need for auxiliary power negatively affects production efficiency and increases eco-burden. In particular, pressure swing adsorption (PSA) used for H 2 purification requires high power consumption, 2) a large amount of heat is lost. To overcome these limitations, we improved a previous Bio-H 2 plant by introducing 2-step PSA and a waste heat recovery system (WHR) to reduce the auxiliary power consumption and to compensate the auxiliary power demand. It was found that, the improved plant reduced the auxiliary power demand by 18.9%, and 7.2% of the required power was compensated by the WHR system. Furthermore, all environmental indicators were improved compared to those for the conventional plant. 水素は，地球温暖化の緩和に有望な二次エネルギーであり，特にバイオマス原料による水素製造は，原料のカーボンニュートラル