Dimethyl ether water vapor reforming catalyst, and hydrogen production method thereof

A technology of steam reforming and dimethyl ether, applied in the direction of catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problem of high reforming temperature and achieve low CO selectivity and stability Good, overcome the effect of high reforming temperature

Active Publication Date: 2018-12-04
SOUTH CHINA UNIV OF TECH
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dimethyl ether water vapor reforming catalyst, and hydrogen production method thereof
  • Dimethyl ether water vapor reforming catalyst, and hydrogen production method thereof
  • Dimethyl ether water vapor reforming catalyst, and hydrogen production method thereof

Examples

Experimental program
Comparison scheme
Effect test

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 3The solution was slowly added dropwise to the mixed nitrate solution to form a precipitate; continued stirring for 2 h, cooled to room temperature, filtered, and washed with deionized water for 3 times; the obtained precipitate was dried at 110 °C for 4 h under an air atmosphere, and then placed in a muffle furnace after drying. at 1℃·min -1 The temperature was raised to 500 °C and calcined at a constant temperature of 500 °C for 3 h 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%, denoted as 13%ZnO-ZrO 2 .

[0030] (2) 13% ZnO-ZrO prepared 2 and γ-Al 2 O 3 According to the mass ratio of 2:1, the mechanical grinding ...

Embodiment 2

[0033] According to each step of embodiment 1, the difference is that step (1) is changed to 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, the difference is that step (1) is changed to 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a dimethyl ether water vapor reforming catalyst, and a hydrogen production method thereof. According to the dimethyl ether water vapor reforming catalyst, gamma-Al2O3 is takenas a dimethyl ether hydrolysis active ingredient, and ZnO-ZrO2 solid solution is taken as a methanol reforming active ingredient so as to obtain a double-function catalyst (ZnO-ZrO2/gamma-Al2O3). In the ZnO-ZrO2/gamma-Al2O3 catalyst, the mass ratio of ZnO-ZrO2 solid solution to gamma-Al2O3 is 0.5 to 5. The hydrogen production method comprises following steps: the ZnO-ZrO2/gamma-Al2O3 catalyst is introduced into a fixed bed reactor, N2 is taken as a diluent gas, water vapor is mixed with dimethyl ether, reforming reaction is carried out in a reaction temperature zone after contact with the catalyst so as to obtain hydrogen gas. The largest activity of the catalyst is achieved at 380 DEG C, and the largest activity is 95.83%. The catalyst is high in activity, and hydrogen yield, low in CO selectivity, and excellent in stability; and the reforming reaction temperature of the catalyst is lower than that of a conventional zinc-based catalyst.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J37/03C01B3/32
CPCB01J23/002B01J23/06B01J35/0013B01J37/031B01J2523/00C01B3/326C01B2203/0233B01J2523/27B01J2523/31B01J2523/48
Inventor 董新法郭春南耿建铭
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap