【摘要】 具有三维微米孔道的烧结Ni微纤包结Pt/Al2O3细粒子催化剂复合材料结构化于毫米尺度流道中的微催化燃烧器,可以作为微型吸热反应的热量来源。考察了操作条件及Pt负载量对微燃烧器中氢气/空气催化燃烧性能的影响,并对催化剂进行了表征。结果表明处于爆炸极限内的氢气催化燃烧反应可以在微燃烧器中安全进行,过高Pt负载量会降低催化燃烧性能。在反应温度83℃,体积空速2.0×105h-1,氢气入口摩尔分数28.5%,负载5%质量分数Pt的条件下,氢气转化率高达92.2%。更多还原

【Abstract】 A micro catalytic combustor was studied as a heat source for micro scale endothermic reactor,which is made from inserting sintered Ni micro-fiber entrapped fine particulates Pt/Al2O3 catalyst in a millimetric scale reaction chamber.The catalytic combustion performance of H2/Air under different experimental conditions and Pt loading has been investigated and the structure and properties of catalysts were characterized.The results showed that the normally highly explosive reaction of H2/air could be conducted in this micro catalytic combustor with inherently safe operation,and over Pt loading would decrease catalytic combustion performance.At 83℃ and 2.0×105 h-1 with 28.5mol% H2 inlet concentration and 5wt% Pt loading,hydrogen conversion can still be over 92.2%.更多还原