title: Reaction kinetic model for a recent co-produced water treatment technology.
abstract: With the increasing demand for fossil 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 H2SO4 has been recently studied as a simple and cost-effective method to decrease the alkalinity of CPWs. The present work investigates the kinetics of the reaction between H2SO4 and NaHCO3, which could provide the base for scaling-up the CPW treatment technology. Based on the measured quantity change of the CO2 gas generated from the reaction between H2SO4 and NaHCO3 with time under specified initial reaction conditions, the reaction orders with respect to H2SO4 and NaHCO3 were determined. Experiments were also conducted within the temperature of 15-30 degrees 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 x 10(34) (mol(-3.7) x L(3.7) x sec(-1)), respectively.
authors.affiliation: Chemical & Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA. atuwati@uwyo.edu
authors.forename: Abdulwahab M Ali
authors.initials: AM
authors.lastname: Tuwati
authors.forename: Maohong
authors.initials: M
authors.lastname: Fan
authors.forename: Mark A
authors.initials: MA
authors.lastname: Bentley
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism; D005579:Fossil Fuels; D008962:Models, Theoretical; D017693:Sodium Bicarbonate / Q000378:metabolism*; D013464:Sulfuric Acids / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
chemical_list: D005579:Fossil Fuels; D013464:Sulfuric Acids; D002245:Carbon Dioxide; D017693:Sodium Bicarbonate; C033158:sulfuric acid