Abstract Co-gasification reactivity of rice straw and bituminous coal/anthracite blended chars under CO2 atmosphere was evaluated using thermogravimetric analysis, and the influences of coal type and gasification temperature on synergy behaviour variations on co-gasification reactivity as carbon conversions increased were quantitatively studied. Furthermore, the chemical forms and concentrations of AAEM species at different co-gasification conversions were quantitatively analyzed for revealing co-gasification synergy mechanism. The results demonstrate that as conversions increased, synergy behaviour on co-gasification reactivity of rice straw-bituminous coal blends was shown as the weakened inhibition effect firstly and then the enhanced synergistic effect. Moreover, the inhibition effect on co-gasification reactivity of rice straw-bituminous coal blends was sustained up to higher conversion with the increment of gasification temperature. Differing from rice straw-bituminous coal blends, synergistic effect on co-gasification reactivity of rice straw-anthracite blends was obviously enhanced at early stage of co-gasification and started to slowly weaken after reaching the most significant synergistic effect at middle stage of co-gasification. Additionally, it was revealed that synergy behaviour variations on co-gasification reactivity of rice straw-bituminous coal blends were mainly attributed to the combination effects of active K and Ca transformation during co-gasification, while those of rice straw-anthracite blends indicated a good correlation with active K transformation during co-gasification.

中文翻译：

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生物质与不同等级煤混焦共气化协同行为变化的机理研究

摘要 采用热重分析法评价了稻草和烟煤/无烟煤混合炭在 CO2 气氛下的共气化反应活性，定量研究了煤种和气化温度对共气化反应性随碳转化率增加的协同行为变化的影响。此外，定量分析了不同共气化转化率下 AAEM 物质的化学形式和浓度，以揭示共气化协同机制。结果表明，随着转化率的增加，稻草-烟煤混合气共气化反应的协同行为表现为抑制作用先减弱，协同作用增强。而且，随着气化温度的升高，稻草-烟煤混合气对共气化反应活性的抑制作用一直持续到更高的转化率。与稻草-烟煤共混物不同，稻草-无烟煤共混物对共气化反应活性的协同作用在共气化初期明显增强，在共气化中期达到最显着的协同作用后开始缓慢减弱。气化。此外，研究还表明，稻草-烟煤共混气化反应性的协同行为变化主要归因于共气化过程中活性钾和钙转化的共同作用，而稻草-无烟煤共混物的协同作用变化表明了与共气化过程中活性 K 转化的相关性。