Experimental study of hydrogen production and soot particulate matter emissions from methane rich-combustion in inert porous media
Experimental study of hydrogen production and soot particulate matter emissions from methane rich-combustion in inert porous media
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DOI：
10.1016/j.ijhydene.2012.02.041
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发表时间：
2012-11
影响因子：
7.2
通讯作者：
A. Loukou;I. Frenzel;J. Klein;D. Trimis
中科院分区：
文献类型：
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作者：
A. Loukou;I. Frenzel;J. Klein;D. Trimis
对惰性多孔介质中的静态热部分氧化（TPOX）进行了详细的实验研究。所测试的TPOX重整器的反应区被设计成使得能够在宽范围的操作条件下稳定地转化燃料/空气混合物。该过程的操作特性已被检查为两个不同的多孔基质，具有不同的热和传输性能，即SiSiC开放泡沫结构和纯Al 2 O3填充材料的填充床的形式的圆柱形环。反应物预热的影响也进行了检查，因为重整器是为了集成在高温燃料电池系统。扫描反应物入口温度为400 °C和550 °C的操作方案，热负荷在350 kW/m2至2600 kW/m2的范围内变化，当量比在1.9至2.9的范围内变化。记录所有测试条件下重整器反应区内的温度分布，同时在线分析气体样品的主要物质H2、CO、CO2和次要物质CH 4、C2 H2。在反应物的入口温度为400 °C和600 °C下，对于1540 kW/m2的固定热负荷和在过程的炭黑极限附近（φ = 2.2-2.6）的选定当量比，用扫描迁移率粒度仪（SMPS）测量废气中的炭黑粒度分布。结果表明，在SiSiC基质的情况下，更好的热性能和更高的孔隙率使得缓慢的重整反应能够更长的停留时间朝向平衡发展，并且产生在颗粒数量和质量浓度方面具有显著更少的烟灰的合成气。
A detailed experimental study of stationary Thermal Partial Oxidation (TPOX) within inert porous media has been conducted. The reaction zone of the tested TPOX reformer is designed so as to enable stationary conversion of fuel/air mixtures for a wide range of operational conditions. Operating characteristics of the process have been examined for two different porous matrices, with different thermal and transport properties, namely SiSiC open foam structure and a packed bed of pure Al2O3packing material in the form of cylindrical rings. The influence of reactants preheating was also examined since the reformer is meant for integration within high temperature fuel cell systems. The operating regime was scanned for reactants' inlet temperature of 400 °C and 550 °C, varying the thermal load in a range from 350 kW/m2up to 2600 kW/m2and the equivalence ratio from 1.9 up to 2.9. Temperature profiles within the reaction region of the reformer were recorded for all tested conditions while gas samples were on-line analyzed for the major species H2, CO, CO2, and minor species CH4, C2H2. At reactants' inlet temperatures of 400 °C and 600 °C, for a fixed thermal load of 1540 kW/m2and for selected equivalence ratios around the sooting limit of the process (φ = 2.2–2.6), soot particle size distributions were measured in the exhaust gas with a Scanning Mobility Particle Sizer (SMPS). The results show that the better thermal properties and the higher porosity in the case of the SiSiC matrix enables longer residence times for slow reforming reactions to evolve towards equilibrium and yields syngas with significantly less soot in terms of particle numbers and mass concentration.