Catalyst for autothermal reformation of methanol to prepare hydrogen and its prepn process and application
An autothermal reforming and catalyst technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., to achieve the effects of small size, easy replacement and strong shock resistance
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example 1
[0039] Example 1: Preparation of Zn-Cr / Ce-Zr / cordierite catalyst
[0040] a) Take 1 piece of φ15×25mm 400cpsi (400 holes / square inch) cordierite honeycomb ceramic, use 3% HNO 3 Pretreatment for 12 hours, drying at 120°C for 12 hours, and roasting at 900°C for 2 hours.
[0041] b) Weigh out industrial grade Ce(NO 3 ) 3 ·6H 2 O 630g, add deionized water and stir to dissolve. Weigh industrial grade Zr(OH) 4 57.8g, put it into a beaker, add 110±2ml of 65-68% concentrated nitric acid, heat the reaction until there are no visible particles and the solution is transparent, add 200±10ml of deionized water, and the solution is clear. The dissolved Zr(NO 3 ) 4 The solution was poured into Ce(NO 3 ) 3 In the solution, filter, stir and mix uniformly to obtain Ce(NO 3 ) 3 with Zr(NO 3 ) 4 mixture. with 13%NH 4 OH as gelling agent, with 35% HNO 3 As a degelling agent, CeO was prepared by sol-gel method 2 -ZrO 2 The composite oxide sol is ready for use. The pH of the sol ...
example 2
[0045] Example 2: Preparation of Zn-Cr / Ti-Zr / cordierite catalyst
[0046] a) The pretreatment of the cordierite honeycomb ceramic carrier is the same as in Example 1.
[0047] b) Weigh out analytically pure TiO 2 Powder 42.7535g, analytically pure ZrO 2 Powder 42.5780g, add 40ml deionized water and 4g pseudoboehmite (Al 2 O 3 ·H 2 O), ball milled for 18 hours. The pH value of the ball-milling slurry is adjusted to be equal to 3.0 with 10% dilute nitric acid solution for later use.
[0048] c) Weigh the above honeycomb ceramic carrier with a weight of 2.2191g, take TiO 2 -ZrO 2 The composite oxide latex was immersed for 3 minutes, taken out, and blown through the channel with compressed air, dried by microwave for 3 minutes, and calcined in a muffle furnace at 500° C. for 2 hours to obtain a catalyst intermediate weight of 2.6634 g.
[0049] d) Measure 70ml of the Zn-Cr mixed solution of Example 1, transfer it into a beaker and place it on a temperature-programmed elect...
example 3
[0050] Example 3: Zn-Cr / Ce-Zr / Al 2 O 3 / cordierite catalyst preparation
[0051] a) The pretreatment of the cordierite honeycomb ceramic carrier is the same as in Example 1.
[0052] b) Weigh out pseudo-boehmite (Al 2 O 3 ·H 2 O) 9.5g, gibbsite (Al(OH) 3 ) 12.4g, aluminum oxide (γ-Al 2 O 3 ) 14.3g, aluminum nitrate Al(NO 3 ) 3 ·9H 2 O6.7g, after mixing, add 250ml deionized water, 5ml 65-68% nitric acid, ball mill for 12 hours to obtain an aluminum latex (slurry) with an average particle size of 1 μm, and the measured viscosity is 1300 centipoise (cp), and the pH is 3.60.
[0053] c) Take 1 piece of pretreated carrier with a weight of 1.4834g, impregnate it with aluminum latex for 3 minutes, purge the channel with compressed air after taking it out, dry it with microwave for 3 minutes, and bake it in a muffle furnace at 650°C for 2 hours to obtain the weight of the catalyst intermediate 1.5385g.
[0054] d) CeO 2 -ZrO 2 The preparation and coating of the composit...
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