Ce-Zr solid solution catalyst : a new catalyst for hydrogen production from methanol steam reforming
Zheng, Yisong (2021)
2021
All rights reserved. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2021092618062
https://urn.fi/URN:NBN:fi:amk-2021092618062
Tiivistelmä
Hydrogen energy is one of the most active substitutes for fuel cell energy. At present, it is a good choice to solve the storage problem by reforming hydrocarbons to produce the H2 we need on site. There are many ways to produce a large amount of hydrogen in industry. Among the methods of hydrogen production by reforming hydrocarbons, methanol steam reforming has many advantages, such as low reforming temperature and low CO content in reforming gas.
Most research reports show that CO in reforming gas comes from WGS reverse reaction and methanol cracking reaction, while copper-based catalyst has higher selectivity for CO2 and H2. At present, copper-based catalysts have been used in methanol steam reforming for hydrogen production, most of which are CuO / ZnO / Al2O3 catalysts. However, Ce-Zr solid solution catalyst can improve the thermal stability and reduction performance of copper-based catalyst, solve the problem of poor stability of copper-based catalyst, and improve the performance of copper-based catalyst.
In this thesis work, through the introduction of a variety of hydrogen production methods, and the comparison of a variety of hydrogen production methods, the methanol reforming reaction system is highlighted. In addition, Ce-Zr solid solution was prepared by sol-gel method, and CuO / Ce0.8Zr0.2O2 catalysts with different Cu content were prepared by impregnation method. The catalysts were characterized by H2-TPR, BET and XRD. The influence of Cu content on the structure and properties of CuO / Ce0.8Zr0.2O2 catalysts was discussed. It is expected to prepare CuO / Ce0.8Zr0.2O2 catalyst with high activity and high stability. Finally, the prospect and challenge of cerium zirconium solid solution catalyst for methanol steam reforming for hydrogen production were prospected.
Most research reports show that CO in reforming gas comes from WGS reverse reaction and methanol cracking reaction, while copper-based catalyst has higher selectivity for CO2 and H2. At present, copper-based catalysts have been used in methanol steam reforming for hydrogen production, most of which are CuO / ZnO / Al2O3 catalysts. However, Ce-Zr solid solution catalyst can improve the thermal stability and reduction performance of copper-based catalyst, solve the problem of poor stability of copper-based catalyst, and improve the performance of copper-based catalyst.
In this thesis work, through the introduction of a variety of hydrogen production methods, and the comparison of a variety of hydrogen production methods, the methanol reforming reaction system is highlighted. In addition, Ce-Zr solid solution was prepared by sol-gel method, and CuO / Ce0.8Zr0.2O2 catalysts with different Cu content were prepared by impregnation method. The catalysts were characterized by H2-TPR, BET and XRD. The influence of Cu content on the structure and properties of CuO / Ce0.8Zr0.2O2 catalysts was discussed. It is expected to prepare CuO / Ce0.8Zr0.2O2 catalyst with high activity and high stability. Finally, the prospect and challenge of cerium zirconium solid solution catalyst for methanol steam reforming for hydrogen production were prospected.