METHOD FOR HEAT TREATMENT OF CELLULAR STRUCTURES block catalysts iron oxide based

摘要

FIELD: chemistry.;SUBSTANCE: described is a method for thermal treatment of an iron oxide-based block catalyst with a cellular structure, characterised by that thermal treatment of the blocks is carried out in steps, and specifically as follows: blocks are first dried at temperature 20-25°C for not less than 120 h and the air-dried blocks then undergo preliminary step-by-step calcination: while raising temperature to 100-110°C at a rate of 5-7°C/h, holding the blocks at temperature 100-110°C for not less than 10 h; while raising temperature to 250-270°C at a rate of 30-35°C/h, holding the blocks at temperature 250-270°C for not less than 6 h; while raising temperature to 400-410°C at a rate of 50-55°C/h, holding the blocks at temperature 400-410°C for not less than 6 h; and then raising temperature to 950-970°C at a rate of 50-60°C/h and holding the blocks at temperature 950-970°C for not less than 10 h.;EFFECT: thermal treatment method enables to obtain strong block catalysts which are resistant to thermal cycles.;3 ex