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A kind of dimethyl ether steam reforming catalyst and hydrogen production method thereof

A technology of steam reforming and dimethyl ether, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of high reforming temperature and achieve low CO selectivity and good stability , to overcome the effect of high reforming temperature

Active Publication Date: 2021-01-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the defect of high reforming temperature of existing ZnO-based catalysts, the primary purpose of the present invention is to provide a catalyst for steam reforming of dimethyl ether, which is a zinc-based dimethyl ether reforming catalyst with an optimal reforming temperature lower than 400°C. Ether Steam Reforming Catalyst ZnO-ZrO 2 / γ-Al 2 o 3

Method used

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  • A kind of dimethyl ether steam reforming catalyst and hydrogen production method thereof
  • A kind of dimethyl ether steam reforming catalyst and hydrogen production method thereof
  • A kind of dimethyl ether steam reforming catalyst and hydrogen production method thereof

Examples

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Embodiment 1

[0029] (1) 0.6g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 5.8g zirconium nitrate (Zr(NO 3 ) 4 ·5H 2 O) dissolved in 100ml deionized water, weighed 3.06g (NH 4 ) 2 CO 3 Prepared into 100ml solution. Under the condition of stirring at 70°C, the (NH 4 ) 2 CO 3Slowly add the solution dropwise to the mixed nitrate solution to form a precipitate; continue to stir for 2 hours, cool to room temperature, filter, and wash with deionized water for 3 times; the obtained precipitate is dried at 110°C for 4 hours in an air atmosphere, and after drying, place it in a muffle furnace at 1°C·min -1 Raise the temperature to 500°C and roast at a constant temperature of 500°C for 3 hours to obtain the active component ZnO-ZrO for metal oxide solid solution reformation 2 , where the mole fraction of ZnO in the solid solution is 13%, recorded as 13% ZnO-ZrO 2 .

[0030] (2) The prepared 13% ZnO-ZrO 2 and γ-Al 2 o 3 According to the mass ratio of 2:1, mechanically grind and mix evenly, pre...

Embodiment 2

[0033] According to each step of embodiment 1, difference is that step (1) is changed into 1.979g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 3.875g (NH 4 ) 2 CO 3 . The mole fraction of ZnO in the solid solution is 33%, and the results are shown in Table 1.

Embodiment 3

[0035] According to each step of embodiment 1, difference is that step (1) is changed into 4.02g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), 5.2g (NH 4 ) 2 CO 3 . The mole fraction of ZnO in the solid solution is 50%, and the results are shown in Table 1.

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Abstract

The invention discloses a dimethyl ether steam reforming catalyst and a hydrogen production method thereof. The catalyst is based on γ-Al 2 O 3 It is the active component of dimethyl ether hydrolysis, ZnO‑ZrO 2 The solid solution is a bifunctional catalyst composed of active components for methanol reforming (ZnO-ZrO 2 / γ‑Al 2 O 3 ). The ZnO‑ZrO 2 / γ‑Al 2 O 3 Among the catalysts, ZnO‑ZrO 2 Solid solution and γ‑Al 2 O 3 The mass ratio is 0.5~5. The hydrogen production method is: using the catalyst ZnO‑ZrO 2 / γ‑Al 2 O 3 Packed in a fixed bed reactor with N 2 As a diluent gas, water vapor and dimethyl ether are mixed and contacted with the catalyst in the reaction temperature zone for reforming reaction to produce hydrogen. The catalyst can achieve optimal activity at 380°C, with an activity of 95.83%. The catalyst of the present invention has high activity, high hydrogen production rate, low CO selectivity, lower reforming reaction temperature than traditional zinc-based catalysts, and excellent stability.

Description

technical field [0001] The invention belongs to the field of chemical industry and energy, and in particular relates to a dimethyl ether steam reforming catalyst and a hydrogen production method thereof. Background technique [0002] In recent years, the sharply increased consumption of fossil fuels has inevitably led to energy shortages and various environmental pollution problems. Therefore, people pay more and more attention to the development and utilization of clean energy represented by hydrogen energy. The proton exchange membrane fuel cell (PEMFC) fueled by high-quality hydrogen has attracted widespread attention due to its high energy conversion efficiency, high energy density, low or zero emission of pollutants, and is generally considered to be an alternative to the increasingly scarce Clean and sustainable energy conversion technologies for fossil fuels. However, the development of fuel cells is greatly limited due to the difficulty of hydrogen transportation a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J37/03C01B3/32
CPCC01B3/326B01J23/002B01J23/06B01J37/031C01B2203/0233B01J2523/00B01J35/23B01J2523/27B01J2523/31B01J2523/48
Inventor 董新法郭春南耿建铭
Owner SOUTH CHINA UNIV OF TECH
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