FACTORS AFFECTING NOx CONCENTRATION IN FCC FLUE GAS AND CONTROL METHODS

Petroleum Processing and Petrochemicals ›› 2020, Vol. 51 ›› Issue (1): 97-100.

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FACTORS AFFECTING NO_x CONCENTRATION IN FCC FLUE GAS AND CONTROL METHODS

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SINOPEC Hainan Refining & Chemical Company

Received:2019-08-20 Revised:2019-10-15 Online:2020-01-12 Published:2020-01-19
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Abstract

Abstract: After the start-up of the fourth cycle of the 2.8 Mt/a heavy oil catalytic cracking unit of SINOPEC Hainan Refining & Chemical Co. Ltd. in 2018, the NO_x concentration in flue gas was close to the emission limit of 200 mg/m³ and became a bottleneck restricting the processing load of the unit. In this paper，based on the transformation mechanism of nitrogen in FCC coke, the properties of feedstock，the operations of regenerator and waste heat boiler were analyzed to find the influence factors. Finally，the feed control，operating conditions and additives were determined to control the NO_xconcentration of the flue gas.

Key words: fluid catalytic cracking, NOx, flue gas, feedstock

CLC Number:

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FACTORS AFFECTING NO_x CONCENTRATION IN FCC FLUE GAS AND CONTROL METHODS

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