Catalyst for methanol oxidation and reforming for hydrogen making, manufacture method and uses

A technology of reforming hydrogen production and methanol oxidation, which is applied to the application of the above catalyst in the partial oxidation of methanol to hydrogen production. The preparation of the above catalyst, high stability, high selectivity and low copper catalyst field can solve the problem of methanol production in the shift reaction process. The hydrogen process is complicated, the stability problem has not been solved, and it is not conducive to the mobile hydrogen source of hydrogen production, etc., to achieve high methanol utilization, simplified control, and good temperature resistance

Inactive Publication Date: 2006-04-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of catalyst has two defects: 1) due to the low melting point of copper, CuO in the copper-based catalyst is reduced to Cu and sintered
Although it has been reported in the literature in recent years, the addition of Mn, Cr, Zn and other additives to the catalyst can keep the surface of the catalyst Cu 0 and Cu + species, thereby increasing the catalytic activity, or Al 2 o 3 , ZrO 2 , CeO 2 、TiO 2 As a carrier to improve stability, but CuO is the active component of the copper-based catalys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 0.0607 g of copper nitrate, 44 g of zinc nitrate, and 13.2 g of ammonium dichromate, and dissolve all three components in 500 ml of distilled water as solution A; prepare 0.5 M sodium carbonate solution as solution B. Add 100ml of distilled water into the precipitation tank first, heat it to 40°C, then use two dropping funnels for solution A and solution B respectively, under rapid stirring (stirring speed is 400 rpm), and flow into the tank at the same speed middle. During the precipitation process, the pH is kept at about 7.5, the temperature is 40-45°C, and the sodium carbonate solution dropped in is 1.1 times the theoretically calculated value. After the precipitation is complete, age for 1 hour, wash until neutral, filter, and the product is oven-dried overnight , roasted at 500°C for 3 hours, the powder was ground to 100 mesh and sieved, and pressed into tablets. The catalyst weight composition obtained is: 0.1% CuO-60% ZnO-39.9% Cr 2 o 3 .

Embodiment 2

[0034] Weigh 6.0734 grams of copper nitrate, 43.8 grams of zinc nitrate, 9.9 grams of ammonium dichromate, and 3 grams of urea, mix and grind them evenly in a mortar, put them into a muffle furnace at 500 ° C for rapid decomposition, and then cool to 20 ° C, powder After the material is sieved with 100 meshes, it is rolled into a ball. The weight composition of the obtained catalyst is 10%CuO-60%ZnO-30%Cr 2 o 3 .

Embodiment 3

[0036] After dissolving 1.5 grams of copper nitrate, 21.2 grams of zinc nitrate, and 6.1 grams of ammonium dichromate into 40ml of aqueous solution, impregnate to 100 grams of Al 2 o 3 On the ball, dry at 110°C for 12 hours, and then bake at 500°C for 3 hours to obtain the finished catalyst (0.45%CuO-5%ZnO-3.6%Cr2 o 3 ) / 90.95%Al 2 o 3 (wt%).

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PUM

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Abstract

The oxidation reforming catalyst to prepare hydrogen from carbinol comprises copper oxide 0.1-10w.t%, and solid solution composed of zinc oxide 5-60w.t% and chrome oxide 3-40%, which can be carried on alumina, zirconia, cerium oxide and other carriers with weight of 100-(Cu+ZnO+Cr2O3)%. The opposite method is coprecipitation or rapid decomposition. The hydrogen making reaction needs condition as temperature 280-400Deg, normal pressure to 2.0MPa, airspeed 1000-5000hr-1, and the mole proportion is water: carbinol=1-3.0:0.1-1.

Description

technical field [0001] The invention relates to the hydrogen production technology by the partial oxidation of methanol, in particular to a catalyst with high stability, high selectivity and low copper. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the above-mentioned catalyst in the partial oxidation of methanol to produce hydrogen. Background technique [0004] The production of methanol from hydrogen is an eye-catching research project in the fields of energy and chemical industry in the past 20 to 30 years. Especially in recent years, with the development of proton exchange membrane fuel cells, the technical problems of its hydrogen supply have become increasingly prominent, and methanol is considered to be a good hydrogen carrier. Methanol hydrogen production technology has become a research and development hotspot at home and abroad. The core of it...

Claims

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Application Information

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IPC IPC(8): C01B3/40B01J23/86
CPCY02P20/52
Inventor 洪学伦张朋王树东吴迪镛付桂芝袁权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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