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首页> 外文期刊>Energy Conversion & Management >Evolution of biomass char features and their role in the reactivity during steam gasification in a conical spouted bed reactor
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Evolution of biomass char features and their role in the reactivity during steam gasification in a conical spouted bed reactor

机译：锥形喷射床反应器中蒸汽气化过程中生物质炭特征的演变及其在反应性中的作用

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A study was carried out on the effect the evolution of the porous structure and metal content have on the gasification rate during char gasification in a conical spouted bed reactor. Partially gasified samples at different temperatures (800-900 degrees C range) were collected at various conversion levels and characterized by different techniques (N-2 adsorption-desorption, ultimate/proximate analysis and X-ray Fluorescence). At 900 degrees C there is a fast development of the porous structure, attaining the highest BET specific surface area (S-BET) (633 m(2) g(-1)) at low conversion. Char reactivity profiles revealed that the development of the porous structure influenced the reaction rate mainly at early stages, whereas the increase in the gasification rate for conversions higher than 60% (especially at 900 degrees C) was attributed to the catalytic effect of Ca, K and Fe (the main metals in the ashes).
机译：对锥形喷头床反应器中焦炭气化过程中多孔结构和金属含量的变化对气化速率的影响进行了研究。以不同的转化率收集了在不同温度（800-900摄氏度范围）下的部分气化样品，并通过不同的技术（N-2吸附-解吸，最终/接近分析和X射线荧光分析）进行了表征。在900摄氏度时，多孔结构快速发展，在低转化率下获得最高的BET比表面积（S-BET）（633 m（2）g（-1））。炭反应性分析表明，多孔结构的发展主要在早期阶段影响反应速率，而转化率高于60％（特别是在900摄氏度时）的气化速率提高归因于Ca，K的催化作用。和铁（灰烬中的主要金属）。

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