Smooth shifting from black burn mode to white burn mode of regeneration zone of continuous catalyst regeneration unit, involves providing transition between black burn mode and white burn mode in regeneration zone through BITE burn mode by burning coke on catalyst in burn zone of regeneration zone
	KUMAR Y; AWASTHI P; CHATURVEDI V; KUMAR P
	2023-06-17
专利权人	HPCL-MITTAL ENERGY LTD (HPCL-Non-standard)
申请日期	2023-06-17
专利号	IN202311041327-A
成果简介	NOVELTY - The method for smooth shifting from black burn mode to white burn mode of regeneration zone of continuous catalyst regeneration (CCR) unit, involves providing a transition between black burn mode and white burn mode in regeneration zone through BITE burn mode. The BITE burn mode includes: burning of coke on catalyst in burn zone of regeneration zone, where the burn zone comprises first and second radial zones operating at inlet oxygen content of 0.8 oxygen mol.%, and inlet temperatures of 480 ℃ and 490-495 ℃ respectively; providing chlorination gas to oxychlorination zone, operating with oxygen content of 0 to 4-6 vol% (in-line operating range) and circulates upwards at 440-510 ℃ ; providing calcination gas to calcination zone, operating with oxygen content from 0 to 8-12 vol.% and circulates upwards at 440-520 ℃, where the BITE Burn mode is a part of continuous spectrum between black burn mode and white burn mode. USE - Method for smooth shifting from black burn mode to white burn mode of regeneration zone of CCR unit. ADVANTAGE - The method provides smooth shifting from black burn mode to white burn mode of regeneration zone of CCR unit, and provides a modified, safe and reliable regenerator operation for regeneration zone of the CCR units where shifting from start-up mode to in-line mode is provided with no temperature excursions. The method provides quicker normalization of upset condition related to non-uniform coke formation on catalyst resulting in profitability of the unit and a better platinum dispersion on the reloaded catalyst. The method provides better maintenance of catalyst health by avoiding step change between two extremes. This helps to maintain better platinum dispersion signifying sustained catalyst activity and potentially lower alpha-alumina formation. Possibility of formation of alpha-alumina on platinum catalyst reduces significantly as sudden temperature excursions are avoided. The method has the potential to restore the regenerator internal life due to more conservative operating conditions, can be used in regenerator during start-up and normal running situations where coke burning is difficult to handle. The BITE mode operation avoids major temperature fluctuation in regenerator which is good for regenerator internals. Regenerator is single line equipment of CCR Unit, any abnormality will hamper the unit operation adversely and reformate production on sustained basis will not be feasible at all. The BITE operation improves controllability on normal regenerator parameters over conventional process significantly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a system comprising CCR unit for regenerating catalyst, which has a reaction zone comprising of four reactors with a catalyst lifting arrangement comprising nitrogen lift gas and hydrogen lift gas, and a regeneration zone comprising regenerator which contains two radial burn zone, a oxy-chlorination zone and a calcination zone, where the regenerator operates in BITE burn mode by burning zone 1 and zone 2 with inlet oxygen maintained at 0.8%.
IPC 分类号	B01D-053/14 ; B01J-023/96 ; B01J-038/42 ; C10G-011/18 ; C10G-035/04
国家	印度
专业领域	能源矿产
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/21581
专题	中国科学院新疆生态与地理研究所
作者单位	HPCL-MITTAL ENERGY LTD (HPCL-Non-standard)
推荐引用方式 GB/T 7714	KUMAR Y,AWASTHI P,CHATURVEDI V,et al. Smooth shifting from black burn mode to white burn mode of regeneration zone of continuous catalyst regeneration unit, involves providing transition between black burn mode and white burn mode in regeneration zone through BITE burn mode by burning coke on catalyst in burn zone of regeneration zone. IN202311041327-A[P]. 2023.

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