Small-scale gasification coupled with an internal combustion engine for CHP generation is a well-explored method of bioenergy production. Several commercially available systems can be found across Europe. However, this kind of technology is typically designed to operate optimally and produce minimal tar only when clean, ideal feedstocks with a narrow distribution of moisture, size, and heating value are used. In Canada, the ability to utilize the abundant source of residual biomasses for CHP production would improve the economic case for these units significantly. Therefore, an adaptation of this kind of CHP system is required to be able to utilize alternative, low-value residual feedstocks and achieve optimal efficiency without excessive tar production. This study will investigate the utilization of a simplified kinetic/transport model for the design of a downdraft gasifier operating on residual feedstocks. Experimental data utilizing construction and demolition waste, oriented strand board and chipped pallets are used to validate the developed model. The results show that the model has the ability to be used as a predictive design tool for gasifiers to achieve optimal carbon conversion and reduced tar production for various feedstocks that are relevant to Canada.

Graphic abstract

中文翻译：

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建模作为优化设计使用废物原料的下吸式气化炉的工具

小规模气化与内燃机相结合以产生 CHP 是一种经过充分探索的生物能源生产方法。在欧洲可以找到几种商用系统。然而，这种技术通常被设计为只有在使用具有窄分布的水分、尺寸和热值的清洁、理想的原料时才能以最佳方式运行并产生最少的焦油。在加拿大，利用剩余生物质的丰富来源进行热电联产生产的能力将显着改善这些单位的经济情况。因此，需要对这种 CHP 系统进行改造，以便能够利用替代的、低价值的残余原料，并在不产生过多焦油的情况下实现最佳效率。本研究将研究使用简化的动力学/传输模型来设计使用残余原料运行的下吸式气化炉。利用建筑和拆除废物、定向刨花板和碎托盘的实验数据用于验证开发的模型。结果表明，该模型有能力用作气化炉的预测设计工具，以实现与加拿大相关的各种原料的最佳碳转化和焦油产量降低。

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