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An investigation into the syngas production enhancement from municipal solid waste gasification under various CO_2 concentration atmospheres

机译:各种CO_2浓度大气下城市固体废气气化的合成气生产增强调查

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Developing environmentally benign and energy efficient ways for the handling and disposal of Municipal Solid Waste (MSW) is becoming more of a concern and waste management issues are becoming more evident. The MSW gasification process to produce syngas is a promising candidate for MSW disposal while yielding a versatile product. Due to the heterogeneous nature of MSW, experimental work has yet to elucidate the mechanism responsible for final gaseous production. Currently, the MSW gasification process has been characterized thermogravimetrically under various heating rates and experimental atmospheres, which enables the optimization of syngas production and char burnout. This preliminary data shows that with any concentration of carbon dioxide in the atmosphere the residual char drops from about 20% of the original mass (in an inert atmosphere) to about 5%, corresponding to a significant amount of carbon monoxide production (a 20mg sample with 100ml/min of purge gas showed 0.7% CO at 825°C). To extend this understanding to a more practical level, MSW samples have been tested in a Drop Tube Reactor (DTR) at a temperature range of 500 to 1000°C and at various atmospheres with carbon dioxide concentrations of 0% to 30%. The release of all chemicals from the reactor has been determined using GC/MS and μ-GC, which enables the generation of data for understanding the overall MSW gasification process. Additionally, the enhancement of syngas under various carbon dioxide atmospheres may provide a methodology for Green House Gas (GHG) reduction.
机译:开发环境良性和节能的处理和处置城市固体废物(MSW)正在变得越来越令人满意,废物管理问题变得更加明显。 MSW气化过程生产合成气是MSW处置的有希望的候选者,同时产生多功能产品。由于MSW的异质性,实验工作尚未阐明负责最终气态生产的机制。目前,MSW气化过程在各种加热速率和实验环境下进行了热血管分流,能够优化合成气生产和炭燃烧。该初步数据表明,大气中的任何二氧化碳在大气中,残留的焦炭从约20%的原始质量(惰性气氛中)下降至约5%,对应于大量的一氧化碳产生(20mg样品100ml / min的净气显示为825℃的0.7%CO)。为了将这种理解扩展到更实际的水平,MSW样品已经在500至1000℃的温度范围内的落管反应器(DTR)和各种大气中的0%〜30%的各种大气中测试。使用GC / MS和μ-GC确定来自反应器的所有化学品的释放,这使得能够产生用于理解整体MSW气化过程的数据。另外,在各种二氧化碳大气下的合成气的增强可以为绿房气体(GHG)减少提供一种方法。

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