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The partial pressure of hydrogen is an extremely important factor for hydrogen generation. This study investigated the effect of reduced pressure (via vacuum) on hydrogen production in a CSTR reactor. The results show that the reduced pressure condition is more effective in enhancing H2 production at lower HRT (e.g., 8–4 h) than at higher HRT (e.g., 12 h). The optimal hydrogen yield and overall hydrogen production efficiency occurred at a HRT of 6 h with a value of 4.50 mol H2/mol sucrose and 56.2%, respectively. Meanwhile, at HRT 6 h the hydrogen production rate was 0.937 mol/L/d. In addition, the HPR could be further improved to 1.196 mol/L/d when the HRT was shortened to 4 h, obtaining a 37–271% increase in HPR when compared with that described in the relevant reports. For all experiments, butyrate and acetate were the two primary soluble metabolites, accounting for 85–99% of total soluble microbial products. Predominant production of acetate and butyrate demonstrates the efficient H2 fermentation with reduced pressure processes. 相似文献
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Zhuang Zheng-Yun Hsu Yi-Chang Nurmi Kimmo Chen Chih-Yung Liu Hsing-Hua Tseng Tzu-Shan 《Microsystem Technologies》2018,24(1):273-283
Microsystem Technologies - Session key exchange has become an addressed topic in the field of communications security, particularly for the IP-based call session that travels through the public... 相似文献
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