Experimental and theoretical study of associated petroleum gas processing into normalized gas by soft steam reforming

The article presents the results of experimental investigation and mathematical modeling of a new technology for converting associated petroleum gas to a normalized combustible gas that can be used in gas turbine and gas reciprocator power plants or, after removing part of the СО₂, can be pipelined. The essence of the new technology is that the C2+ hydrocarbons contained in associated petroleum gas are converted by soft steam reforming into a gaseous fuel that consists mainly of methane and contains carbon dioxide and a small amount of hydrogen. This process increases the volume of the gas mixture and normalizes its heating value and Wobbe index to the standard characteristics of commercial natural gas (purified from СО₂). The soft steam reforming technology has been tested on laboratory, pilot, and pre-commercial scales. A mathematical model has been developed for the process. A numerical analysis based on this model has demonstrated that, using this technology, it is possible to process associated petroleum gases varying widely in methane homologue concentrations in one tubular catalytic reactor.     

Experience in the commercial operation of the pilot asynchronized turbogenerator T3FA-110 at cogeneration plant-22 (TÉTs-22) of the Mosénergo Company

Results of commercial operation of a world pioneer asynchronized turbogenerator T3FA-110 with a capacity of 11 MW and full air cooling at a cogeneration plant are presented. The turbogenerator developed jointly by the Electric Power Research Institute and the élektrosila Company differs from traditional synchronous generators by the presence on the rotor of two mutually orthogonal windings, a two-channel reverse thyristor excitation system, and a special control system. The special features of design and control allow such generators to operate in the modes of both production and high consumption of reactive power at normal static and dynamic stability. This widens the range of regulation of the voltage level in the connected electric network and makes it possible to bring parallel-connected synchronous generators to optimum operation conditions. The generator can work without excitation for a long time at 70% load. Commercial operation of the pilot T3FA-110 turbogenerator started in December 2003 at TéTs-22 of the Mosénergo Company and has proved its full correspondence to the design engineering parameters. A program of wide use of such turbogenerators in the United Power System of Russia (RAO “EéS Rossii” Co.) has been developed. __________ Translated from élektricheskie Stantsii, No. 11, November 2005, pp. 2–5.     

Selection of Ceramic Tools in the Production Preparation Stage Taking Account of Operating Properties

Refractories and Industrial Ceramics - As a result of life tests for different ceramic tools during turning alloy M-NP over a wide range cutting regimes their good operating properties are revealed...