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甲醇高压热解和氧化的实验及动力学研究

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利用流动反应器对甲醇的高压氧化及热解特性进行实验研究,在此基础上对已发表的甲醇化学反应动力学模型进行验证,并对宽裂解度范围的甲醇裂解气氧化特性进行模拟.研究结果表明:高压可以有效促进燃料的氧化;掺混甲醇裂解气可以有效降低甲醛的排放量.甲醇及其裂解气产生的活性自由基加快了燃料的化学反应速率,通过HO2自由基间接控制了下游链分支反应,生成大量OH自由基,改变了甲醛消耗路径中各反应的敏感性系数.
Experimental and kinetic study on high pressure pyrolysis and oxidation of methanol
The high-pressure oxidation and pyrolysis characteristics of methanol were experimentally investigated using a flow reactor.On this basis,the published kinetic model of methanol chemical reaction was validated,and the oxidation characteristics of the methanol cracking gas were simulated for a wide range of cracking degrees.The results show that the high pressure can effectively promote the oxidation of the fuel.Blending of the methanol cracking gas can effectively reduce the formaldehyde emissions.The reactive radicals produced by methanol and its cracking gas accelerate the chemical reaction rate of the fuel,indirectly controlling the downstream chain branching reaction through HO2 radicals,generating a large number of OH radicals,and altering the sensitivity coefficients of the reactions in the formaldehyde consumption pathway.

methanoloxidationpyrolysiskinetics modelflow reactoremission

李淑铭、湛昊晨、胡二江、殷阁媛、黄佐华

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西安交通大学 动力工程多相流国家重点实验室,陕西 西安,710049

甲醇 氧化 热解 动力学模型 流动反应器 排放特性

国家自然科学基金资助项目

52106182

2024

中南大学学报(自然科学版)
中南大学

中南大学学报(自然科学版)

CSTPCD北大核心
影响因子:0.938
ISSN:1672-7207
年,卷(期):2024.55(1)
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