Abstract
With the increasing demand for fossil fuels based energy and implementation of progressively strict environmental pollution control standards, treatment of a large amount of co-produced waters (CPWs) from fossil based energy production has become increasingly important. Removal of bicarbonate with H 2SO 4 has been recently studied as a simple and cost-eifective method to decrease the alkalinity of CPWs. The present work investigates the kinetics of the reaction between H 2SO 4 and NaHCO 3, which could provide the base for scaling-up the CPW treatment technology. Based on the measured quantity change of the CO 2 gas generated from the reaction between H 2SO 4 and NaHCO 3 with time under specified initial reaction conditions, the reaction orders with respect to H 2SO 4 and NaHCO 3 were determined. Experiments were also conducted within the temperature of 15–30°C to find various global rate coefficients of the reaction to calculate the activation energy and the pre-exponential factor of the empirical Arrhenius form of the bicarbonate removal reaction, which are 197.7 kJ/mol and 3.13× 10 34 (mol −3.7×L 3.7×sec −1), respectively.
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