Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8954925 | International Journal of Hydrogen Energy | 2018 | 6 Pages |
Abstract
In this study, we construct a scalable tubular single-chamber microbial electrolysis cell that using negative pressure (40.52 kPa) to enhance the hydrogen production. The impact of negative pressure on current production, hydrogen recovery, and microbial community of microbial electrolysis cells are investigated. Negative pressure could effectively enhance the hydrogen recovery and inhibit the growth of methanogens. Consequently, the microbial electrolysis cell operated under negative pressure achieves a maximum hydrogen production rate of 7.72 ± 0.06 L Lâ1 dâ1, which is more than four times higher that of reactor running under normal pressure (1.51 ± 0.41 L Lâ1 dâ1). Energy quantification shows that the electrical energy recovery under negative pressure is 146.98%, which is much higher than 95.00% under normal pressure. Therefore, negative pressure control is as effective for increasing hydrogen production and energy recovery in the scalable MEC, and has a great practical application prospect. However, negative pressure cannot knick out methanogens. Once negative pressure is removed, methanogens will quickly take over and after that applying negative pressure again can only partly inhibit methane production.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Huajun Feng, Lijie Huang, Meizhen Wang, Yingfeng Xu, Dongsheng Shen, Na Li, Ting Chen, Kun Guo,