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Plasma gasification process: Modeling, simulation and comparison with conventional air gasification

机译：等离子气化过程：与常规空气气化的建模，模拟和比较

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In this study, two methods of gasification are developed for the gasification of various feedstock, these are plasma gasification and conventional air gasification. The two methods are based on non-stoichiometric Gibbs energy minimization approach. The model takes into account the different type of feedstocks, which are analyzed at waste to energy lab at Masdar Institute, oxidizer used along with the plasma energy input and accurately evaluates the syngas composition. The developed model is applied for several types of feedstock, i.e. waste tire material, coal, plywood, pine needles, oil shale, and municipal solid waste (MSW), algae, treated/untreated wood, instigating air/steam as the plasma gas and only air as oxidizer for conventional gasification. The results of plasma gasification and conventional air gasification are calculated on the bases of product gas composition and the process efficiency. Results of plasma gasification shows that high gasification efficiency is achievable using both tire waste material and coal, also, the second law efficiency is calculated for plasma gasification that shows a relative high efficiency for tire and coal as compare to other feedstock. The average process efficiency for plasma gasification is calculated to be around 42%. On other hand the result of conventional gasification shows an average efficiency of 72%. The low efficiency of plasma gasification suggest that if only the disposal of hazard waste material is considered then plasma gasification can be a viable option to recover energy.
机译：在这项研究中，开发了两种用于气化各种原料的气化方法，分别是等离子气化和常规空气气化。两种方法均基于非化学计量的吉布斯能量最小化方法。该模型考虑了不同类型的原料，这些原料在Masdar Institute的能源实验室的废物实验室进行了分析，氧化剂与等离子能量输入一起使用，并能够准确评估合成气的组成。所开发的模型适用于多种类型的原料，例如废轮胎材料，煤炭，胶合板，松针，油页岩和城市固体废物（MSW），藻类，经处理/未经处理的木材，防止空气/蒸汽产生等离子气体以及仅空气作为传统气化的氧化剂。等离子气化和常规空气气化的结果是根据产物气体组成和工艺效率计算的。等离子气化的结果表明，使用轮胎废料和煤均可实现较高的气化效率，而且，等离子气化的第二定律效率是计算得出的，与其他原料相比，等离子气化显示出相对较高的轮胎和煤效率。经计算，等离子体气化的平均工艺效率约为42％。另一方面，常规气化的结果显示平均效率为72％。等离子气化的低效率表明，如果仅考虑处置危险废物，则等离子气化可能是回收能源的可行选择。

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