Manrique Raiza, Vásquez Daniela, Ceballos Carlos, Chejne Farid, Amell Andrés
Group of Applied Thermodynamics and Alternative Energies, Facultad de Minas, Universidad Nacional de Colombia, Cra 80 65-223, Medellín 050034, Colombia.
Group of Science and Technology of Gas and Energy Rational Use, Facultad de Ingeniería, Universidad de Antioquia, Calle 67 53-108, Medellín 050010, Colombia.
ACS Omega. 2019 Feb 8;4(2):2957-2963. doi: 10.1021/acsomega.8b02591. eCollection 2019 Feb 28.
Coffee husks represent about 12 wt % of coffee grains, generating a significant impact on the environment because of its inadequate disposal. In Colombia, this waste presents an energy resource opportunity equivalent to over 49,106 TJ per year. However, several challenges related to this type of biomass, such as the moisture content, the irregular shapes, and the low bulk density, make its use difficult in current burners. Thus, in this paper, the combustion of coffee husk pellets was studied in detail to design a high-efficiency burner to produce energy for coffee drying. The pellets were prepared in a pelletizer with 15% moisture and 20% yield and burned in a bench-scale lateral reactor to determine the energy density. It was found that the combustion properties of coffee husk depend on the specifics of the pelleting process. The energy density values were = 0.789 MW/m and = 0.007 MW/m, which could be used to design the combustion chamber for coffee husk burning.
咖啡壳约占咖啡豆重量的12%，由于其处理不当，对环境产生了重大影响。在哥伦比亚，这种废弃物每年带来的能源资源机会相当于超过49106太焦耳。然而，与这类生物质相关的几个挑战，如含水量、形状不规则和堆积密度低，使得其在当前燃烧器中的使用变得困难。因此，在本文中，对咖啡壳颗粒的燃烧进行了详细研究，以设计一种高效燃烧器，为咖啡干燥生产能源。颗粒在制粒机中制备，含水量为15%，产率为20%，并在实验室规模的横向反应器中燃烧以确定能量密度。结果发现，咖啡壳的燃烧特性取决于制粒过程的具体情况。能量密度值分别为 = 0.789兆瓦/平方米和 = 0.007兆瓦/平方米，可用于设计咖啡壳燃烧的燃烧室。
