关键词: 燃料电池, 低温启动, 催化燃烧, 数值模拟, 燃料电池, 低温启动, 催化燃烧, 数值模拟

Abstract: When contrasting with traditional power system，fuel cell has a lot of advantages. But it still has many practical problems，such as low-temperature cold startup. Different strategies of fuel cell cold startup were discussed. Some related researches on hydrogen catalytic combustion and fuel cell cold startup were summarized and analyzed and the factors affecting the catalytic combustion were investigated. Hydrogen low-temperature catalytic combustion provided one way to achieve effective and reliable startup of fuel cell. Hydrogen could achieve stable combustion in a micro-tube for different reaction models. Surface catalytic combustion restrained gas phase combustion. The highest temperature could be obtained when surface catalytic combustion and gas phase combustion occurred at the same time. Inlet velocity，conductive wall and its material，tube diameter as well as equivalent ratio of hydrogen/air mixture had significant influence on catalytic combustion of hydrogen.

Key words: Fuell cell, Cold startup, Catalytic combustion, Numerical simulation, fuel cell, cold startup, catalytic combustion, numerical simulation