Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242, USA.
College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China.
Waste Manag. 2019 Apr 15;89:201-211. doi: 10.1016/j.wasman.2019.03.070. Epub 2019 Apr 9.
Waste tires have an organic-matter composition of more than 90% and have been proposed as an excellent calorific fuel material. The objective of this study is to find an economic and efficient pathway for producing syngas by waste tires gasification. To achieve this goal, two most commonly used gasifier types of fluidized bed and fixed bed have been simulated and compared by using a semi-empirical model and a one-dimensional kinetics model, respectively. Moreover, economic analysis of the levelized cost of syngas is used to compare economic indicators of different gasifiers. Results show that the lower heating value of the tire-syngas product is 2.5-7.4 MJ/Nm, moreover, equivalence ratio and tire mixture ratio have negative impacts on syngas heating value and syngas efficiency. Furthermore, the levelized cost of syngas of tire gasification is 0.33-0.60 ¢/kWh that is lower than the market price of natural gas at 0.68 ¢/kW, which indicates tire gasification is a potential technology for syngas production. Finally, compared with the fluidized bed tire gasification, the fixed bed tire gasification has worse performance but better economic indicators, indicating that fixed bed gasification is an economic pathway for the syngas product.
废轮胎的有机物组成超过 90%，被提议作为一种极好的高热值燃料材料。本研究的目的是寻找一种经济有效的方法，通过废轮胎气化生产合成气。为了实现这一目标，使用半经验模型和一维动力学模型分别对两种最常用的气化炉类型——流化床和固定床进行了模拟和比较。此外，通过使用平准化成本法对合成气的经济性进行了分析，比较了不同气化炉的经济指标。结果表明，轮胎合成气产品的低热值为 2.5-7.4 MJ/Nm，并且当量比和轮胎混合比会对合成气的热值和效率产生负面影响。此外，轮胎气化的平准化成本为 0.33-0.60 美分/千瓦时，低于天然气的市场价格 0.68 美分/千瓦时，这表明轮胎气化是一种有潜力的合成气生产技术。最后，与流化床轮胎气化相比，固定床轮胎气化的性能较差，但经济指标较好，这表明固定床气化是合成气产品的经济途径。
