| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to compositions for reduction of NOx content and to method of their application in order to reduce NOx emissions in processes of oil-processing plants, and namely in processes of cracking with fluidised catalyst (CFC). Described is method of reduction of NOx emissions from regeneration zone in process of fluidised catalytic cracking of hydrocarbon raw material into products with lower molecular weight, which includes: a) contacting of hydrocarbon raw material in process of fluidised catalytic cracking (CFC), in which occur NOx emissions from regeneration zone of fluidised catalytic cracking, operating in CFC conditions, with circulating loading of cracking catalyst, and with granulated composition, reducing NOx content, having average particle size larger than 45 mcm and containing (i) at least 30 wt % of ferrierite zeolite and (ii) approximately from 5 to 50 wt % of inorganic binding material, which is selected from group, consisting of aluminium oxide, silicon dioxide, alumosilicate, aluminium phosphate and their mixtures; and b) at least 10% reduction of NOx emissions, released from regeneration zone of installation of fluidised catalytic cracking, in comparison with amount of NOx emissions, released in absence of granulated composition, reducing NOx content. Also described is composition of fluidised catalytic cracking (CFC) catalyst, which includes: a) cracking component of CFC, suitable for catalytic cracking of hydrocarbons in CFC conditions, and b) granulated composition, reducing NOx formation and having average particle size larger than 45 mcm and containing (i) at least 30 wt % of ferrierite zeolite and (ii) approximately from 5 to 50 wt % of inorganic binding material, which is selected from group, consisting of aluminium oxide, silicon dioxide, alumosilicate, aluminium phosphate and their mixtures. Also described is method of reduction of NOx emissions from regeneration zone of process of fluidised catalytic cracking of hydrocarbon raw material into products with lower molecular weight, which includes contacting of hydrocarbon raw material with cracking catalyst at higher temperature, which results in formation of hydrocarbon components with lower molecular weight, and said cracking catalyst contains composition by described above items. ^ EFFECT: obtaining compositions for reduction of NOx in emitted gases, released from regenerator of installation of cracking with fluidised catalyst (ICFC) in CFC process, without essential change of degree of hydrocarbon conversion or output of valuable products of cracking. ^ 119 cl, 6 ex, 8 tbl, 1 dwg |
