A gasification-based waste-to-energy technique has been considered as a promising alternative to direct incineration. With the potential benefits of reducing the greenhouse gas emission and producing syngas, CO₂ gaisification of municipal solid waste (MSW) was studied in a drop-tube reactor. Process parameters, including the temperature and CO₂/MSW mass ratio, were investigated. On the basis of the experimental results, energy and exergy analyses were conducted to evaluate the thermodynamic quality. Results indicated that the temperature had a significant impact on the syngas composition, while the effects of the CO₂/MSW mass ratio were not so profound. The tendency of the syngas composition revealed that the Boudouard reaction, water gas reaction, and free radical combination reaction were the most influential reactions in the gasification process. Energy and exergy analyses showed that the total energy and exergy values of syngas increased with the rising temperature, whereas they declined initially and then rose with the increase in the CO₂/MSW mass ratio. The detailed energy and exergy distributions of the syngas component were different at various temperatures and CO₂/MSW mass ratios. As a result of the remarkable difference between physical energy and exergy of sensible heat, the exergy value of syngas was much lower than its energy value. It followed well with the energy value.

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滴管式反应器中城市固体废物的CO ₂气化：合成气的实验研究和热力学分析

基于气化的废物转化能源技术被认为是直接焚烧的一种有前途的替代方法。考虑到减少温室气体排放和产生合成气的潜在好处，在滴管式反应器中研究了城市固体废物（MSW）的CO ₂气化作用。研究了工艺参数，包括温度和CO ₂ / MSW质量比。根据实验结果，进行了能量和火用分析以评估热力学质量。结果表明温度对合成气组成有显着影响，而CO ₂的影响/ MSW质量比不是很深。合成气组成的趋势表明，在气化过程中，Boudouard反应，水煤气反应和自由基结合反应是影响最大的反应。能量和火用分析表明，合成气的总能和火用值随温度升高而增加，而随着CO ₂ / MSW质量比的增加先降低后升高。在各种温度和CO ₂ / MSW质量比下，合成气组分的详细能量和火用分布不同。由于物理能与显热的火能之间存在显着差异，因此合成气的火能值远低于其能值。能量值紧随其后。