Investigation of high catalytic activity catalyst for high hydrogen production rate: Co-Ru@MOF

2021 ◽  
Author(s):  
Erhan Onat ◽  
Sabri Çevik ◽  
Ömer Şahin ◽  
Sabit Horoz ◽  
Mehmet Sait İzgi
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Production Rate ◽  
High Catalytic Activity ◽  
Hydrogen Production Rate ◽  
High Hydrogen ◽  
Activity Catalyst

High hydrogen production rate in a submerged membrane anaerobic bioreactor

2017 ◽  
Vol 42 (39) ◽  
pp. 24656-24666 ◽  
Author(s):  
Alexandre Noblecourt ◽  
Gwendoline Christophe ◽  
Christian Larroche ◽  
Gaëlle Santa-Catalina ◽  
Eric Trably ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Production Rate ◽  
Hydrogen Production Rate ◽  
High Hydrogen ◽  
Anaerobic Bioreactor

Enhancement of catalytic activity of AgPd@Pd/TiO2 nanoparticles under UV and visible photoirradiation

2016 ◽  
Vol 4 (38) ◽  
pp. 14649-14656 ◽  
Author(s):  
Masaharu Tsuji ◽  
Daisuke Shimamoto ◽  
Keiko Uto ◽  
Masashi Hattori ◽  
Hiroki Ago
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Formic Acid ◽  
Tio2 Nanoparticles ◽  
Production Rate ◽  
Room Temperature ◽  
Acid Decomposition ◽  
Hydrogen Production Rate ◽  
Formic Acid Decomposition

The hydrogen production rate of AgPd@Pd/TiO2 nanocatalysts from formic acid decomposition was enhanced by 50–60% at room temperature under photoirradiation.

High yield hydrogen production in a single-chamber membrane-less microbial electrolysis cell

2010 ◽  
Vol 61 (3) ◽  
pp. 721-727 ◽  
Author(s):  
Yejie Ye ◽  
Liyong Wang ◽  
Yingwen Chen ◽  
Shemin Zhu ◽  
Shubao Shen
Keyword(s):  
Hydrogen Production ◽  
Production Rate ◽  
Hydrogen Concentration ◽  
Current Density ◽  
Production Performance ◽  
Electrolysis Cell ◽  
Hydrogen Production Rate ◽  
High Hydrogen ◽  
Single Chamber ◽  
Hydrogen Recovery

The single-chamber membrane-less MEC exerted much better hydrogen production performance while given higher applied voltages than it did at lower. High applied voltages that could shorten the reaction time and the exposure of anode to air for at least 30 min between cycles can significantly suppress methanogen and increase hydrogen production. At an applied voltage of 1.0 V, a hydrogen production rate of 1.02 m3/m3/day with a current density of 5.7 A/m2 was achieved. Cathodic hydrogen recovery and coulombic efficiency were 63.4% and 69.3% respectively. The hydrogen concentration of mixture gas produced of 98.4% was obtained at 1.0 V, which was the best result of reports. The reasons that such a high hydrogen concentration can be achieved were probably the high electrochemical activity and hydrogen production capability of the active microorganisms. Increase in substrate concentrations could not improve MEC's performance, but increased the reaction times. Further, reactor configuration and operation factors optimisation should be considered to increase current density, hydrogen production rate and hydrogen recovery.

Improvement of Organic Loading Rate on Hydrogen Production Using Continuous Stirred Tank

2013 ◽  
Vol 805-806 ◽  
pp. 1382-1386
Author(s):  
Jian Hui Zhao ◽  
Ning Li ◽  
Yong Feng Li
Keyword(s):  
Hydrogen Production ◽  
Production Rate ◽  
Gas Production ◽  
Stirred Tank ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Hydrogen Production Rate ◽  
Brown Sugar ◽  
High Hydrogen ◽  
Continuous Stirred Tank

The influence of organic loading rates (OLRs) on the production of fermentation hydrogen was investigated in a continuous stirred tank reactor (CSTR) with brown sugar water as the fermentation substrate, and sewage sludge as the initiation of reaction. Six OLRs were examined, ranging from 12 kg/m3·d to 32 kg/m3·d. The biogas and hydrogen production rates continuously increased with increasing OLR (12 kg/m3·d to 32 kg/m3·d).It reached a maximum production rate of 18.6L/d and a hydrogen production rate of 6.4L/d at OLR= 32 kg/m3·d. Compared with the initial 12kg/m3·d, gas production improved by 89% and 87%, respectively. During system operation, the reactor could maintain a high hydrogen production rate of ethanol-type fermentation by adding a certain amount of NaOH in the reactor to regulate the pH level.

Amino group promoted photocatalytic hydrogen evolution activity observed in two copper(ii)-based layered complexes

2018 ◽  
Vol 47 (36) ◽  
pp. 12726-12733 ◽  
Author(s):  
Lei Li ◽  
Shuang Zhu ◽  
Rui Hao ◽  
Jia-Jun Wang ◽  
En-Cui Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Visible Light ◽  
Production Rate ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Amino Group ◽  
Group Effect ◽  
Hydrogen Production Rate ◽  
Layered Complex

The amino group effect of the photocatalyst on the catalytic activity of water splitting was investigated under visible light irradiation. The hydrogen production rate of the amino group modified layered complex is almost double that without the amino group.

scholarly journals Enhanced hydrogen production of Rhodobacter sphaeroides promoted by extracellular H+ of Halobacterium salinarum

2021 ◽  
Vol 71 (1) ◽  
Author(s):  
Jiang-Yu Ye ◽  
Yue Pan ◽  
Yong Wang ◽  
Yi-Chao Wang
Keyword(s):  
Hydrogen Production ◽  
Production Rate ◽  
Rhodobacter Sphaeroides ◽  
Coupled System ◽  
Purple Membrane ◽  
Halobacterium Salinarum ◽  
Control Group ◽  
Hydrogen Production Rate ◽  
Production Of Hydrogen ◽  
The Impact

Abstract Purpose This study utilized the principle that the bacteriorhodopsin (BR) produced by Halobacterium salinarum could increase the hydrogen production of Rhodobacter sphaeroides. H. salinarum are co-cultured with R. sphaeroides to determine the impact of purple membrane fragments (PM) on R. sphaeroides and improve its hydrogen production capacity. Methods In this study, low-salinity in 14 % NaCl domesticates H salinarum. Then, 0–160 nmol of different concentration gradient groups of bacteriorhodopsin (BR) and R. sphaeroides was co-cultivated, and the hydrogen production and pH are measured; then, R. sphaeroides and immobilized BR of different concentrations are used to produce hydrogen to detect the amount of hydrogen. Two-chamber microbial hydrogen production system with proton exchange membrane-assisted proton flow was established, and the system was operated. As additional electricity added under 0.3 V, the hydrogen production rate increased with voltages in the coupled system. Results H salinarum can still grow well after low salt in 14% NaCl domestication. When the BR concentration is 80 nmol, the highest hydrogen production reached 217 mL per hour. Both immobilized PC (packed cells) and immobilized PM (purple membrane) of H. salinarum could promote hydrogen production of R. sphaeroides to some extent. The highest production of hydrogen was obtained by the coupled system with 40 nmol BR of immobilized PC, which increased from 127 to 232 mL, and the maximum H2 production rate was 18.2 mL−1 h−1 L culture. In the 192 h experiment time, when the potential is 0.3 V, the hydrogen production amount can reach 920 mL, which is 50.3% higher than the control group. Conclusions The stability of the system greatly improved after PC was immobilized, and the time for hydrogen production of R. sphaeroides significantly extended on same condition. As additional electricity added under 0.3 V, the hydrogen production rate increased with voltages in the coupled system. These results are helpful to build a hydrogen production-coupled system by nitrogenase of R. sphaeroides and proton pump of H. salinarum. Graphical abstract

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