CuO／ZnO／CeO2-ZrO2催化甲醇水蒸气重整制氢性能

Performance of CuO/ZnO/CeO_2-ZrO_2 Catalyst for Methanol Steam Reforming

以液体燃料甲醇分布式现场重整制氢系统开发为研究目的，根据非对称耦合的思想，将CuO／ZnO／Ce02-Zr02甲醇水蒸气重整催化剂和Pt／A1203催化燃烧催化剂应用于套筒式小型制氢反应器中，实现了甲醇水蒸气重整反应和燃烧反应的耦合。实验考察了CuO／ZnO／Ce02-Zr02催化剂在套筒式小型制氢反应器中的性能。结果表明：在套筒式小型制氢反应器内，CuO／ZnO／Ce02．Zr02催化剂的甲醇水蒸气重整活性比商业CuO／ZnO／A1203催化剂高出30％左右；并且多次开停车和改变反应条件，均未对催化剂和反应器产生明显影响，150h内催化剂和反应器稳定性良好。当反应温度为230-260℃，甲醇气体空速为3001200h^-1，水醇物质的量比（S／M）为1．2时，最大氢产率达162．8L／h，可为百瓦级质子交换膜燃料电池提供氢源。

The aim of this work was to develop the system of distributed hydrogen production from methanol steam reforming(MSR). According to the idea of the asymmetric coupling, the Cu O/Zn O/Ce O2-Zr O2 catalyst for methanol steam reforming and the Pt/Al2O3 catalyst for catalytic combustion were used in a sleeve of mini reactor for hydrogen production and the coupling of methanol steam reforming reaction and combustion reaction was realized. The performances of Cu O/Zn O/Ce O2-Zr O2 catalyst were investigated in the sleeve of mini reactor. The results showed that the activity of Cu O/Zn O/Ce O2-Zr O2 catalyst was about 30% higher than that of Cu O/Zn O/Al2O3 catalyst in this reactor. No significant impact on the performances of catalyst and reactor was observed after the reaction condition was changed and the program of the reactor was switched on and off for many times. The Cu O/Zn O/Ce O2-Zr O2 catalyst had excellent reforming performances with no deactivation during 150 h stability test. When the reaction temperature was 230-260 ℃, the methanol gas hourly space velocity was 300-1 200 h-1,and the molar ratio of steam to methanol was 1.2, the highest hydrogen yield can be up to 162.8 L/h, and the hydrogen production process was supplied for proton exchange membrane fuel cell on hectowatt scale.