Potential use and the energy conversion efficiency analysis of fermentation effluents from photo and dark fermentative bio-hydrogen production

2017 ◽  
Vol 245 ◽  
pp. 884-889 ◽  
Author(s):  
Zhiping Zhang ◽  
Yameng Li ◽  
Huan Zhang ◽  
Chao He ◽  
Quanguo Zhang
Keyword(s):  
Hydrogen Production ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Efficiency Analysis ◽  
Potential Use

The Efficiency of Material Utilization and Energy Conversion of Biogas Fermentation by Annua

2012 ◽  
Vol 621 ◽  
pp. 273-277
Author(s):  
Chang Mei Wang ◽  
Wu Di Zhang ◽  
Yu Bao Chen ◽  
Fang Yin ◽  
Shi Qing Liu ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Methane Production ◽  
Energy Conversion Efficiency ◽  
Utilization Efficiency ◽  
Fermentation Time ◽  
Utilization Ratio ◽  
Material Utilization

This paper used annua as material to do a biogas fermentation experiment. The result suggests that biogas-fermentation by pretreated annua is a preferable approach compared with methane production followed by hydrogen production, only methane production, or only hydrogen production, due to its decreasing overall fermentation time, and increasing material utilization efficiency and energy conversion efficiency. It shows that the TS and VS utilization ratio of first hydrogen production then methane production is higher than that of first methane production then hydrogen production.

scholarly journals Photoelectrochemical CO2Conversion to Hydrocarbons Using an AlGaN/GaN-Si Tandem Photoelectrode

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Masahiro Deguchi ◽  
Satoshi Yotsuhashi ◽  
Yuka Yamada ◽  
Kazuhiro Ohkawa
Keyword(s):  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Solar Light ◽  
Main Reaction ◽  
Cathode Potential ◽  
Reaction Products ◽  
Reduction System ◽  
Potential Use

We report on a qualitatively improved photoelectrochemical CO2reduction system which makes it possible to convert CO2into hydrocarbons. The key is the tandem photoelectrode, which consists of AlGaN/GaN and Si device with p-n junction. The Si device is located on the back of AlGaN/GaN structure and acts as activation layer that raises cathode potential. Use of a Cu cathode results in change of the main reaction products from CO and HCOOH to hydrocarbons such as CH4and C2H4. The energy conversion efficiency to hydrocarbons from CO2is estimated to be 0.046% under irradiation with concentrated solar light.

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