Numerical simulations of fluidization dynamics in a hot model of a CLC process

Abstract

Abstract. Chemical Looping Combustion (CLC) is one of the most promising alternatives for solid fuel combustion. CO2 concentration in the exhaust gas is high in CLC technology which enables high efficiency of CO2 capture from flue gas. The use of solid oxygen carriers is a characteristic feature of a CLC process. Oxygen carriers are mainly metal oxides which are characterized by high oxygen transfer capacity and high mechanical resistance. Since the CLC technology is not sufficiently recognized due to its complexity the development of models with real conditions of the CLC equipment is of practical significance. The paper presents numerical simulations of the dynamic fluidized bed for Chemical Looping Combustion using CeSFaMB software. The model was validated on the basis of the results obtained from experiments, which were carried out on the Fluidized-Bed Chemical-Looping-Combustion of Solid-Fuels (FB-CLC-SF) unit. The studies were conducted in air atmosphere at temperature of 850°C. The validation of the 1.5D model showed that the maximum relative error between experiment and simulations results does not exceed 12%.

A comprehensive model of NOx and SO2 emissions from advanced coal combustion in a complex geometry CLC equipment

“…The model uses triangular and constant terms for inputs and outputs, respectively [26]. The validation procedure was successfully performed on the hot facility [27] (Table 2). Comparing measured and predicted SO2 and NOx emissions revealed that the maximum relative error is lower than 10 %.…”

Modeling of the Chemical Looping Combustion of Hard Coal and Biomass Using Ilmenite as the Oxygen Carrier

“…CeSFaMB was successfully used as a modeling tool in many scientific papers for various objects such as furnaces, boilers, dryers, and gasifiers [23][24][25], including applications of the CLC processes [1,3,[26][27][28].…”

Study on the Key Technology of CO2 Compression and Purification in Oxy-Fuel Combustion Coal-Fired Power Plant

“…Several technologies have been proposed for reducing CO 2 emission from coal-fired power generation, namely, postcombustion capture, precombustion capture, and oxy-fuel combustion capture . These three major carbon capture technologies for coal-fired power plants have been studied in terms of power generation efficiency, capital costs, and costs of electricity. − Chemical looping combustion is a new technology for CO 2 reduction, − which uses fuel and air to achieve reduction and oxidation of metal oxides, respectively, in separate gas streams. Among them, oxy-fuel combustion is one of the most promising technologies for CO 2 capture.…”