废咖啡渣热解制备碳中和生物炭的多目标运行优化。
Multi-objective operation optimization of spent coffee ground torrefaction for carbon-neutral biochar production.
机构信息
Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan.
Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan.
出版信息
Bioresour Technol. 2023 Feb;370:128584. doi: 10.1016/j.biortech.2023.128584. Epub 2023 Jan 5.
Many energy-intensive processes are employed to enhance biomass fuel properties to overcome the difficulties in utilizing biomass as fuel. Therefore, energy conservation during these processes is crucial for realizing a circular bioeconomy. This study develops a newly devised method to evaluate SCG biochars' higher heating value (HHV) and predict moisture content from power consumption. It is found that the increasing rates of HHV immediately follow decreases in power consumption, which could be used to determine the pretreatment time for energy conservation. The non-dominated sorting genetic algorithm II (NSGA-II) maximizes SCG biochar's HHV while minimizing energy consumption. The results show that producing SCG biochar with 23.98 MJ∙kg HHV requires 20.042 MJ∙kg, using a torrefaction temperature of 244 °C and torrefaction time of 27 min and 43 sec. Every kilogram of biochar with an energy yield of 85.93 % is estimated to cost NT$ 12.21.
许多能源密集型工艺被用于提高生物质燃料的特性，以克服将生物质作为燃料利用的困难。因此，在这些过程中节约能源对于实现循环生物经济至关重要。本研究开发了一种新的方法，用于评估 SCG 生物炭的高位热值 (HHV) 并根据耗电量预测水分含量。结果发现，HHV 的增长率紧随耗电量的下降而增加，这可用于确定节能的预处理时间。非支配排序遗传算法 II (NSGA-II) 最大化了 SCG 生物炭的 HHV，同时最小化了能源消耗。结果表明，以 244°C 的热解温度和 27 分钟 43 秒的热解时间生产 HHV 为 23.98 MJ·kg 的 SCG 生物炭需要 20.042 MJ·kg。估计每千克能量产量为 85.93%的生物炭的成本为新台币 12.21 元。
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