III International Conference

PP-III-50THE CATALYTIC UTILIZATION PROCESS OF SULFUR DIOXIDE OF EXITGASES OF THE ENTERPRISES OF NONFERROUS METALLURGY WITHOBTAINING OF ELEMENTARY SULFURRustamova S.T., Akhmedov M.M., Agaev A.I.Institute of Chemical Problems of National Academy of Sciences of Azerbaijan, Baku,AzerbaijanE-mail: chem@science.azResearches on revealing an opportunity of practical application of modified clinoptilolitewere carried out as the catalyst for restoration process of sulfur dioxide by gaseous reducers.Optimum conditions of carrying out restoration process of sulfur dioxide by hydrogen (oncobaltclinoptilolite) and hydrogen sulfide (on ironcontaining clinoptilolite) were determined.Kinetic studies were carried out and kinetic parameters of both processes were determined.The restoration process of sulfur dioxide of exit gases of the enterprises of nonferrousmetallurgy by gaseous reducers (natural gas and products of its conversion, carbon monoxide,hydrogen sulfide) is possible to carry out by thermal and catalytic way. Introduction of hightemperature(homogeneous) technology of obtaining of sulfur from gases of furnacessuspended melting and Vanyukov melting on Norilsk Mountain - metallurgical combine/Russia/ has allowed revealing the same essential lacks which are inherent also by otherthermal methods.Introduction of low-temperature (catalytic) process of obtaining of sulfur from exit gasesautogenous melting will allow to reduce temperature of process up to 700 o C (instead of1250-1300 o C at a high-temperature way), to reduce the consumption of natural gas on25-30 %, to provide increase of a degree of extraction of sulfur from gases from 75-80 % upto 90-95 %, to get sulfur of the first-rate quality, to increase reliability of work of a reactor.The basic group of the catalysts, used for restoration of sulfur dioxide by all gaseousreducers, represents the catalysts, containing aluminum oxide, as in pure state, so as in variouscompounds, natural and synthetic. Modified by cobalt and nickel alumooxide catalysts,suggested by us, have passed successful tests on the Ryazan testing - experimentalmetallurgical plant (in 1989) and the initial data for designing pilot installations were given.Presently we carry out researches on revealing an opportunity of practical application ofzeolites, as more available and cheap for restoration of sulfur dioxide by gaseous reducers.The active catalyst for restoration process of sulfur dioxide with hydrogen (as aconversion product of natural gas) was developed on the basis of natural zeolite -564