CO2-based reconfigurable enhanced oil recovery using the oxy-fuel-fired boilers: Thermal and flow properties

摘要

This work presents first-of-a-kind results on the enhanced oil recovery (EOR) by CO2 stream of oxy-fuel-fired circulating fluidized bed (CFB) boilers for Constant Furnace Size Scenario and Constant Thermal Power Scenario. The CO2 flow rate, the associated impurities and the furnace thermal properties are investigated. The total mass flow rate of the EOR gas in Constant Furnace Size Scenario for the oxy-fuel case of 70% O-2 concentration becomes more than 2.6 times of the one with 29% O-2 concentration. The oxy-fuel CFB usage for EOR offers the opportunity of reconfigurable manufacturing system (RMS) where the CO2 production capacity is flexible to market demand. While the increased CO2 mass flow rates at elevated O-2 concentrations is in favor of Constant Furnace Size Scenario, the mass flow rates of the impurities of O-2, CO and H2O also increase leading to higher costs for gas cleaning before sending the CO2 stream for EOR injection. The relatively low outgoing CO level in addition to considerably lower furnace CO maxima compared to the other scenario are merits of Constant Thermal Power Scenario. (C) 2017 Elsevier Ltd. All rights reserved.