Abstract Influences of biomass leachate (BL) additives (rice straw leachate(RSL) and corn straw leachate(CSL)) on reactivity characteristics and structural evolution of petroleum coke (PC)–CO2 gasification were investigated. Specific reactivity (SR0.9) was proposed to quantify influence of BL on PC char gasification and the results demonstrate that BL facilitated PC char gasification and RSL showed more obvious catalytic effect, which was mainly attributed to positive effect of BL on carbon structure evolution and AAEM specie retention during PC char gasification. The results from Raman band area ratio difference and AAEM/Si difference of gasification semi-chars demonstrate that BL was conducive to reducing order degree of carbon structure, increasing amorphous carbon structure and enhancing AAEM concentrations during PC char gasification and RSL exhibited more positive effect. Furthermore, SR0.9 variations with temperature show that catalytic effects of BL initially weakened and then enhanced as gasification temperature increased from 1000 to 1300 °C, which was well related with variation trend of positive effect of BL on char structural evolution at different temperatures. Free-model method exactly predicted char gasification with high correlation coefficients (>0.98), and activation energy of PC char with CSL and RSL additions were 28.00 kJ mol−1 and 41.68 kJ mol−1 lower than that of PC char, respectively.

中文翻译：

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生物质渗滤液对石油焦气化结构演化及反应特性的影响

摘要 研究了生物质渗滤液（BL）添加剂（稻草渗滤液（RSL）和玉米秸秆渗滤液（CSL））对石油焦（PC）-CO2气化反应特性和结构演化的影响。提出了比反应性 (SR0.9) 来量化 BL 对 PC 炭气化的影响，结果表明 BL 促进了 PC 炭的气化，RSL 表现出更明显的催化作用，这主要归因于 BL 对碳结构演变和PC 炭气化过程中的 AAEM 物质保留。气化半焦的拉曼谱带面积比差异和AAEM/Si差异结果表明BL有利于降低碳结构的有序度，在 PC 炭气化和 RSL 过程中增加无定形碳结构和提高 AAEM 浓度表现出更积极的影响。此外，SR0.9随温度的变化表明，随着气化温度从1000℃升高到1300℃，BL的催化作用先减弱后增强，这与BL对不同温度下炭结构演化的正向影响变化趋势密切相关。自由模型方法准确预测了炭气化，相关系数高（>0.98），添加 CSL 和 RSL 的 PC 炭的活化能分别比 PC 炭低 28.00 kJ mol-1 和 41.68 kJ mol-1。图 9 随温度的变化表明，随着气化温度从 1000 ℃升高到 1300 ℃，BL 的催化作用先减弱后增强，这与 BL 在不同温度下对炭结构演化的正向影响变化趋势密切相关。自由模型方法准确预测了炭气化，相关系数高（>0.98），加入 CSL 和 RSL 的 PC 炭的活化能分别比 PC 炭低 28.00 kJ mol-1 和 41.68 kJ mol-1。图 9 随温度的变化表明，随着气化温度从 1000 ℃升高到 1300 ℃，BL 的催化作用先减弱后增强，这与 BL 对不同温度下炭结构演化的正向影响变化趋势密切相关。自由模型方法准确预测了炭气化，相关系数高（>0.98），加入 CSL 和 RSL 的 PC 炭的活化能分别比 PC 炭低 28.00 kJ mol-1 和 41.68 kJ mol-1。