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Thermophysical and chemical properties of bioliq slags

机译：生物熔渣的热物理和化学性质

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The challenges of future regarding the energy supply are linked to the limitation of fossil fuels, the avoidance of climatic relevant gases, and the worldwide increasing demand for energy. Therefore, the future energy supply is characterized by the increase of renewable energy: sun, water, wind and biomass. Entrained flow gasification of biomass is promising, since it is a highly efficient and flexible process. Low-grade fuels are chemically transformed at high temperatures (> 1200 degrees C) and pressures (up to 80 bar) into synthetic fuels. The inorganics of the fuel are converted into a slag, which forms a layer in the reactor. The thermophysical and chemical properties of the slag are defining the conditions and limitations of the gasification process. In this study, the fundamental thermophysical properties of bioliq slags are determined, in order to describe the heat transfer and the flow of the slag across the reactor by CDF-modelling of the bioliq-gasifier within the HVIGasTech project. By using a high temperature viscometer the viscosity and flow behavior of the slag were determined. In addition, the density and surface tension were measured by the sessile drop method. Thermometric and calorimetric methods were used to provide a detailed view onto the slags heat capacity and phase transitions. Thermodynamic calculations using FactSage and an in-house developed thermodynamic database for available solution phases and compounds were performed to obtain information about the ash-slag transformation. (C) 2017 Elsevier Ltd. All rights reserved.
机译：未来能源供应方面的挑战与化石燃料的限制，避免气候相关气体以及全球对能源需求的增长有关。因此，未来的能源供应以可再生能源（太阳，水，风和生物质）的增加为特征。生物质的气流床气化是有前途的，因为它是一种高效且灵活的过程。低级燃料在高温（> 1200摄氏度）和压力（最高80 bar）下化学转化为合成燃料。燃料的无机物转化为炉渣，在反应堆中形成一层。炉渣的热物理和化学性质决定了气化过程的条件和局限性。在这项研究中，确定了生物液渣的基本热物理性质，以便通过HVIGasTech项目中生物液气化炉的CDF模型描述热传递和炉渣在反应器中的流动。通过使用高温粘度计，确定炉渣的粘度和流动行为。另外，通过无滴法测定密度和表面张力。测温和量热法用于提供炉渣热容量和相变的详细视图。使用FactSage和内部开发的热力学数据库对可用的溶液相和化合物进行热力学计算，以获得有关灰渣转化的信息。 （C）2017 Elsevier Ltd.保留所有权利。

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