Reforming catalyst ups hydrogen production

2005 ◽  
Vol 2005 (6) ◽  
pp. 5-5
Keyword(s):  
Hydrogen Production ◽  
Reforming Catalyst

Hydrogen Production through CO2 Absorption Enhanced Diesel Steam Reforming for PEMFC Systems

2011 ◽  
Vol 343-344 ◽  
pp. 250-255
Author(s):  
Wan Liang Mi ◽  
Qing Quan Su ◽  
Qing Cheng ◽  
Juan Gong
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Concentration ◽  
Steam Reforming ◽  
Heat Balance ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Optimal Temperature ◽  
Reforming Catalyst ◽  
Optimal Temperature Range ◽  
And Shifts

CO2absorption enhanced diesel steam reforming was investigated for hydrogen production in this paper. The utilization of CO2absorbent in the reforming reactor sharply decreases the CO2level in the reacting gas and shifts the equilibrium towards hydrogen formation. This increases the diesel conversion and reforming rate of hydrocarbon at relatively low temperature. At the temperature of 600°C, reforming rate of hydrocarbon reached 95%, and that is 30 percent higher than that in traditional steam reforming reaction without absorbent. In an optimal temperature range of 545-625 °C, diesel conversion could reach near 100%. Hydrogen concentration reached 95% when using CO2absorbent, correspondingly concentrations of CO, CH4, and CO2decreased obviously, while hydrogen concentration was about 70% in conventional diesel steam reforming process. Further, a novel PEMFC system for hydrogen production was proposed by combining CO2absorption enhanced diesel steam reforming (AEDSR) with chemical-looping combustion (CLC) process, which could continuously produce hydrogen and regenerate absorbent at the same time, heat balance of steam reforming and CO2absorption reaction could also be obtained by adjusting the amount of reforming catalyst and CaO.

Divergent beam microanalysis studies of bimetallic platinum catalysts supported on γ-AL2O3

1995 ◽  
Vol 53 ◽  
pp. 428-429
Author(s):  
JR Fryer ◽  
Z Huang ◽  
D Stirling ◽  
G. Webb
Keyword(s):  
Dead Time ◽  
Platinum Catalysts ◽  
Beam Intensity ◽  
Beam Diameter ◽  
Divergent Beam ◽  
Bimetallic Systems ◽  
Reforming Catalyst ◽  
Before And After ◽  
Individual Particles

Platinum dispersed on γ-alumina is used as a reforming catalyst to convert linear hydrocarbons to cyclic aromatic products. To improve selectivity and lifetime of the catalyst, other elements are included, and we have studied the distributions of Pt/Re, and Pt/Sn, bimetallic systems on the support both before and after use in octane reforming. Often, one or both of the components are not resolvable by HREM or microanalysis as individual particles because of small size and lack of contrast on the alumina, and divergent beam microanalysis has been used to establish the presence and relationship between the two elements.In the majority of catalysts the platinum is in the form of small panicles, some of which are large enough to be resolvable in the microscope. The ABT002B microscope with Link windowless Pentafet detector, used in this work, was able to obtain a resolvable signal from particles of 2nm diameter upwards. When the beam was concentrated on to such a particle the signal was at a maximum, and as the beam diameter was diverged - at the same total beam intensity and dead time - the signal decreased as shown in Figure 1.

Utilization of electrical charges in the pores of tofu waste for hydrogen production in water

2020 ◽  
pp. 124-135
Author(s):  
I. N. G. Wardana ◽  
N. Willy Satrio
Keyword(s):  
Magnetic Field ◽  
Hydrogen Production ◽  
Sodium Bicarbonate ◽  
Positive Charge ◽  
Electrical Energy ◽  
Hydrogen Sensor ◽  
Water Molecules ◽  
Partial Charge ◽  
Delocalized Electron ◽  
Water Hydrogen

Tofu is main food in Indonesia and its waste generally pollutes the waters. This study aims to change the waste into energy by utilizing the electric charge in the pores of tofu waste to produce hydrogen in water. The tofu pore is negatively charged and the surface surrounding the pore has a positive charge. The positive and negative electric charges stretch water molecules that have a partial charge. With the addition of a 12V electrical energy during electrolysis, water breaks down into hydrogen. The test was conducted on pre-treated tofu waste suspension using oxalic acid. The hydrogen concentration was measured by a MQ-8 hydrogen sensor. The result shows that the addition of turmeric together with sodium bicarbonate to tofu waste in water, hydrogen production increased more than four times. This is due to the fact that magnetic field generated by delocalized electron in aromatic ring in turmeric energizes all electrons in the pores of tofu waste, in the sodium bicarbonate, and in water that boosts hydrogen production. At the same time the stronger partial charge in natrium bicarbonate shields the hydrogen proton from strong attraction of tofu pores. These two combined effect are very powerful for larger hydrogen production in water by tofu waste.

Sign in / Sign up

Export Citation Format

Share Document