NISCAIR Online Periodicals Repository Collection: IJCT Vol.13(2) [March 2006]

Improved oil recovery using polymeric gelants: A review

Sun, 26 Feb 2006 22:58:59 GMT

Title: Improved oil recovery using polymeric gelants: A review

Authors: Karmakar, G P; Chakraborty, Chandrima

Abstract: Oil and gas production from the reservoirs are often accompanied by huge amount of water production. Excessive water production from the oil and gas reservoirs is one of the major problems faced by the petroleum industries worldwide. Polymers and gels have been successfully used for many years to control the water production. Most methods involve cross-linked polyacrylamide gels initiated by metal ions or organic radical formation. Some inorganic compounds, particularly Fe(III) compounds can be transformed to gels by in-situ hydrolysis, which can be effectively used as the blocking materials. A new type of organically modified silicate compound, tetramethoxysilane (TMOS) has been supposed to be more effective in water shut-off jobs. In-situ cross-linking acid diverting agents (ISCADA) is proved to be a better solution to stimulate the multi-layered reservoirs. Certain biopolymers and foams may also be used successfully to control water production in oil or gas reservoirs. This paper attempts to review the present status of the gel systems used in the oil industries to control the water production during oil and gas production.

Page(s): 162-167

Electro-chemical production of ozone using water electrolysis cell of solid polymer electrolyte (SPE)

Sun, 26 Feb 2006 22:58:59 GMT

Title: Electro-chemical production of ozone using water electrolysis cell of solid polymer electrolyte (SPE)

Authors: Han, Sang-Do; Kim, Jung-Duk; Myung, Kwang-Shik; Rana, Ravi Kumar; Singh, K C

Abstract: A new method for the preparation of anode electro-catalyst for O₃ production in water electrolysis cell using solid polymer electrolyte has been described. The current voltage curves at different temperatures are discussed. The ozone production efficiency is found to be maximum at current density around 1.5 amp/cm² at temperature around 25°C.

Page(s): 156-161

Densities and ultrasonic velocities of binary mixtures of 2,4,6-trimethyl-1,3,5-trioxane + n-alcohols at 298.15, 303.15 and 308.15 K

Sun, 26 Feb 2006 22:58:59 GMT

Title: Densities and ultrasonic velocities of binary mixtures of 2,4,6-trimethyl-1,3,5-trioxane + n-alcohols at 298.15, 303.15 and 308.15 K

Authors: Wankhede, N N; Wankhede, D S; Lande, M K; Arbad, B R

Abstract: The densities and ultrasonic velocities of binary mixtures of 2,4,6-trimethyl-1,3,5-trioxane + ethanol, 1-propanol and 1-butanol at 298.15, 303.15 and 308.15 K were measured over the whole mole fraction range. Experimental data were used to estimate isentropic compressibility (k_s), intermolecular free length (L_f), specific acoustic impedance (Z) and their deviations, such as deviation in isentropic compressibility (k_s), excess intermolecular free length (L_f^E) and excess acoustic impedance (Z^E). The results are fitted to a Redlich-Kister equation. The results are discussed in terms of molecular interactions.

Page(s): 149-155

Holdup measurement in a gas-liquid ejector for a sodium chloride-air system

Sun, 26 Feb 2006 22:58:59 GMT

Title: Holdup measurement in a gas-liquid ejector for a sodium chloride-air system

Authors: Raghuram, P T; Das, T R

Abstract: Holdup measurements have been carried out experimentally using gamma ray attenuation method in a gas liquid ejector for a sodium chloride-air system. The measured values are compared with the theoretically predicted values based on feed calculations. Holdup as a function of the liquid flowrate and also its distance from the nozzle of the ejector has been reported in this paper. The results obtained for this non-reactive system are also compared with those of air-water system.

Page(s): 144-148