scholarly journals Research of Hydrogen Preparation with Catalytic Steam-Carbon Reaction Driven by Photo-Thermochemistry Process

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Xiaoqing Zhang ◽  
Bingqing Xu ◽  
Yan Xu ◽  
Shuyong Shang ◽  
Yongxiang Yin
Keyword(s):  
Solar Energy ◽  
Conversion Efficiency ◽  
Catalytic Reaction ◽  
Hydrogen Generation ◽  
Reaction System ◽  
Chemical Energy ◽  
Xenon Lamp ◽  
Rate Of Reaction ◽  
Catalyst Content ◽  
Content Range

An experiment of hydrogen preparation from steam-carbon reaction catalyzed by K2CO3was carried out at 700°C, which was driven by the solar reaction system simulated with Xenon lamp. It can be found that the rate of reaction with catalyst is 10 times more than that without catalyst. However, for the catalytic reaction, there is no obvious change for the rate of hydrogen generation with catalyst content range from 10% to 20%. Besides, the conversion efficiency of solar energy to chemical energy is more than 13.1% over that by photovoltaic-electrolysis route. An analysis to the mechanism of catalytic steam-carbon reaction with K2CO3is given, and an explanation to the nonbalanced [H2]/[CO + 2CO2] is presented, which is a phenomenon usually observed in experiment.

Hydrogen generation from glucose catalyzed by organoruthenium catalysts under mild conditions

2017 ◽  
Vol 53 (30) ◽  
pp. 4230-4233 ◽  
Author(s):  
Yulu Zhan ◽  
Yangbin Shen ◽  
Shuping Li ◽  
Baohua Yue ◽  
Xiaochun Zhou
Keyword(s):  
Catalytic Reaction ◽  
Hydrogen Generation ◽  
Reaction System ◽  
Homogeneous Catalyst ◽  
Mild Conditions

Here, we describe a catalytic reaction system where H2 can be produced from glucose using a homogeneous catalyst.

Hydrogen Generation for 500 hours by Photoelectrolysis of Water using GaN

2012 ◽  
Vol 1446 ◽  
Author(s):  
W. Ohara ◽  
D. Uchida ◽  
T. Hayashi ◽  
M. Deura ◽  
K. Ohkawa
Keyword(s):  
Conversion Efficiency ◽  
Electric Charge ◽  
Hydrogen Generation ◽  
Incident Light ◽  
Hydrogen Gas ◽  
Light Energy ◽  
Chemical Energy ◽  
Incident Photon

ABSTRACTWe confirmed that GaN photocatalyst with NiO cocatalyst (GaN-NiO) continuously produced hydrogen from water for 500 hours without any extra bias. The GaN-NiO photocatalyst was hardly etched and 184-mL hydrogen gas was produced from the electric charge of 1612 coulombs, the Faradic efficiency of which was 89.2%. The conversion efficiency from incident light energy to hydrogen chemical energy was 0.98% in average for 500 h. The incident photon-to-current conversion efficiency (IPCE) was 50% at 300 nm and 35% at 350 nm after the experiment, which was much higher than those of other semiconductor-based photocatalysts.

scholarly journals Ferroelectric Materials: A Novel Pathway for Efficient Solar Water Splitting

2018 ◽  
Vol 8 (9) ◽  
pp. 1526 ◽  
Author(s):  
Sangmo Kim ◽  
Nguyen Nguyen ◽  
Chung Bark
Keyword(s):  
Solar Energy ◽  
Water Splitting ◽  
Conversion Efficiency ◽  
Water Oxidation ◽  
Complex Structure ◽  
Ferroelectric Materials ◽  
Promising Candidate ◽  
Solar Water ◽  
Solar Water Splitting ◽  
The Past

Over the past few decades, solar water splitting has evolved into one of the most promising techniques for harvesting hydrogen using solar energy. Despite the high potential of this process for hydrogen production, many research groups have encountered significant challenges in the quest to achieve a high solar-to-hydrogen conversion efficiency. Recently, ferroelectric materials have attracted much attention as promising candidate materials for water splitting. These materials are among the best candidates for achieving water oxidation using solar energy. Moreover, their characteristics are changeable by atom substitute doping or the fabrication of a new complex structure. In this review, we describe solar water splitting technology via the solar-to-hydrogen conversion process. We will examine the challenges associated with this technology whereby ferroelectric materials are exploited to achieve a high solar-to-hydrogen conversion efficiency.

Detection of L-Tert-Leucine in the Enzyme-Catalyzed Reaction System

2013 ◽  
Vol 641-642 ◽  
pp. 717-720
Author(s):  
Sheng Deng ◽  
Li Cui ◽  
Li Min Ma
Keyword(s):  
Quality Control ◽  
Correlation Coefficient ◽  
Flow Rate ◽  
Catalytic Reaction ◽  
Reaction System ◽  
Direct Determination ◽  
Average Recovery ◽  
Enzyme Catalytic Reaction

Direct Determination of L-Ter-Leucine in Enzyme Catalytic Reaction System by HPLC Was Studied. the Detection Were Performed on a Kromasil 700-5C18 Column Using a Eluant Containing 0.25% (NH4)H2PO4 and 100% Methanol (V((NH4)H2PO4):V(methanol)=100:5) with the Flow Rate of 0.8 Ml/min at,detection Wavelength of 205nm. there Was a Good Line Correlation between Peak Area and Contents in the Rang of 0.2-10 Mg/ml, the Correlation Coefficient Was 0.9986, the Average Recovery Was 98.88% with a Relative Stand Deviation of 0.78% (n=5). this Method Is Simple, Stable, Accurate and Reliable for the Quality Control of L–ter-Leucine.

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