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Plasma catalyzing process of preparing hydrogen by ammonia decomposition

A plasma and ammonia decomposition technology, applied in chemical instruments and methods, hydrogen production, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low activity, reduce decomposition temperature and improve performance , cost reduction effect

Inactive Publication Date: 2006-11-15
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The implementation effect shows that the activity of noble metal ruthenium (Ru) and rhodium (Rh) supported catalysts is high, while the activity of non-noble metal iron (Fe) and nickel (Ni) supported catalysts is low

Method used

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  • Plasma catalyzing process of preparing hydrogen by ammonia decomposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 6 milliliters of the non-precious metal iron catalyst (expressed as Fe / Al 2 o 3 ) is filled in the discharge area of ​​the wire barrel type dielectric barrier discharge plasma reactor, the catalyst particles are irregular in shape, and the equivalent diameter is 1-1.5 mm, wherein the active ingredient loading in terms of elemental iron (Fe) is 10% ( Weight), the rest is alumina carrier, the ratio of catalyst equivalent diameter to reactor inner diameter is 0.1-0.17. The reactor shell 4 (blocking medium) is made of hard glass, with a wall thickness of 1 mm, an inner diameter of 9 mm, and a discharge zone length of 100 mm. The heat insulation material 5 outside the shell adopts asbestos. The metal high-voltage discharge electrode 2 of the reactor is made of ordinary stainless steel wire with a diameter of 2 mm, and the insulating seal between it and the reactor shell is made of alumina ceramic material. The metal grounding electrode 6 is a copper mesh, and the ceramic s...

Embodiment 2

[0048] Example 1 was repeated, but the discharge parameters were set as follows: the initial voltage of the transformer was 23 volts, and the discharge frequency was 12 kHz. Then the power of the high-voltage power supply reaches 35.19 watts, the actual discharge voltage is 12.33 kV, the temperature of the reactor is stabilized at 363°C after the reaction is stable, and the ammonia decomposition conversion rate reaches 21%.

Embodiment 3

[0050] Example 1 was repeated, but the discharge parameters were set as follows: the initial voltage of the transformer was 27 volts, and the discharge frequency was 12 kHz. Then the power of the high-voltage power supply reaches 41 watts, the actual discharge voltage is 12.1 kV, the temperature of the reactor is stabilized at 371°C after the reaction is stable, and the ammonia decomposition conversion rate reaches 36%.

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Abstract

A plasma catalysis process for preparing H2 by decomposing ammonia at lower temp to obtain the H2-N2 mixture used for the proton exchange membrane type fuel battery of car features that the non-noble-metal carried catalyst, whose active component is chosen from Fe, Co, Ni, Cr, Mo, Mn, Cu and W, is loaded in the discharge region in a plasma catalytic reactor.

Description

technical field [0001] The invention belongs to the technical field of plasma chemistry and hydrogen energy, and relates to a hydrogen-nitrogen mixed gas that can decompose ammonia gas at a relatively low temperature, which is beneficial to the use of proton exchange membrane fuel cell vehicles and does not contain carbon monoxide and carbon dioxide. method. Background technique [0002] The increasing depletion of fossil energy such as coal, oil and natural gas, and the serious environmental pollution caused by the direct use of these fossil energy forces people to continuously improve the efficiency and cleanliness of energy use. It is against this background that the development and application of hydrogen energy has received more and more attention from countries all over the world. [0003] Hydrogen energy can be converted into electricity using a proton exchange membrane fuel cell (PEMFC). What happens during this conversion is a battery reaction of hydrogen and oxyg...

Claims

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Application Information

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IPC IPC(8): C01B3/04B01J23/85
CPCY02E60/36
Inventor 郭洪臣刘春阳王丽陈黎行王祥生宫为民
Owner DALIAN UNIV OF TECH
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