Characteristics and Kinetics of Coked Catalyst Regeneration via Steam Gasification in a Micro Fluidized Bed

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	Characteristics and Kinetics of Coked Catalyst Regeneration via Steam Gasification in a Micro Fluidized Bed
	Zhang, Yuming 1,2; Yao, Meiqin 2; Sun, Guogang 1; Gao, Shiqiu 2; Xu, Guangwen 2
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2014-04-16
卷号	53 期号:15 页码:6316-6324
关键词	CARBONACEOUS DEPOSITS REACTIVITY COMBUSTION CO2 TEMPERATURE PARTICLES PYROLYSIS MECHANISM HYDROGEN REACTOR
ISSN号	0888-5885
其他题名	Ind. Eng. Chem. Res.
中文摘要	Petroleum residue cracking combined coke gasification (RCCG) process was proposed to regenerate the catalyst via coke-steam gasification for syngas production, thus to solve the problem of excessive heat generated via coke combustion in the industrial fluid catalytic cracking (FCC) process. A commercial FCC catalyst and a bifunctional (BF) catalyst were used as the candidates for the RCCG process, and the BF catalyst was specially designed with both catalytic effects of oil cracking and coke gasification. The regeneration characteristics and kinetics of FCC and BF catalysts were studied using a micro fluidized bed. The results showed that high-quality syngas was produced when regenerating the catalysts via steam gasification and the sum of H-2 and CO in the produced gas was over 80 vol % under electrically heated condition.The gasification rate first increased with increasing carbon conversion and then slowly decreased. In comparison with FCC catalyst, the regeneration time of BF catalyst was shortened by more than 30% via addition of alkaline metal oxides and adjustment of its pore size. Homogenous model (HM) and shrinking core model (SCM) were used to calculate the regeneration kinetic parameters of coked catalysts. It was found that the activation energies from these two models were close to each other, while HM had a better fitting relevance for the data than SCM. The activation energy of BF catalyst regeneration was about 115 kJ.mol(-1), lower than that of FCC catalyst (150 kJ.mol(-1)), demonstrating that BF catalyst was easier to regenerate via coke gasification and also justified its bifunctional characteristics. The activation energy of coke gasification on BF catalyst could be further decreased to 45 kJ.mol(-1) when introducing 3% oxygen as the gasification reagent.
英文摘要	Petroleum residue cracking combined coke gasification (RCCG) process was proposed to regenerate the catalyst via coke-steam gasification for syngas production, thus to solve the problem of excessive heat generated via coke combustion in the industrial fluid catalytic cracking (FCC) process. A commercial FCC catalyst and a bifunctional (BF) catalyst were used as the candidates for the RCCG process, and the BF catalyst was specially designed with both catalytic effects of oil cracking and coke gasification. The regeneration characteristics and kinetics of FCC and BF catalysts were studied using a micro fluidized bed. The results showed that high-quality syngas was produced when regenerating the catalysts via steam gasification and the sum of H-2 and CO in the produced gas was over 80 vol % under electrically heated condition.The gasification rate first increased with increasing carbon conversion and then slowly decreased. In comparison with FCC catalyst, the regeneration time of BF catalyst was shortened by more than 30% via addition of alkaline metal oxides and adjustment of its pore size. Homogenous model (HM) and shrinking core model (SCM) were used to calculate the regeneration kinetic parameters of coked catalysts. It was found that the activation energies from these two models were close to each other, while HM had a better fitting relevance for the data than SCM. The activation energy of BF catalyst regeneration was about 115 kJ.mol(-1), lower than that of FCC catalyst (150 kJ.mol(-1)), demonstrating that BF catalyst was easier to regenerate via coke gasification and also justified its bifunctional characteristics. The activation energy of coke gasification on BF catalyst could be further decreased to 45 kJ.mol(-1) when introducing 3% oxygen as the gasification reagent.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	CARBONACEOUS DEPOSITS ; COMBUSTION ; REACTIVITY ; CO2 ; TEMPERATURE ; PARTICLES ; PYROLYSIS ; MECHANISM ; HYDROGEN ; REACTOR
收录类别	SCI
原文出处	://WOS:000334657400008
语种	英语
WOS记录号	WOS:000334657400008
公开日期	2014-08-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/11043]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yuming,Yao, Meiqin,Sun, Guogang,et al. Characteristics and Kinetics of Coked Catalyst Regeneration via Steam Gasification in a Micro Fluidized Bed[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(15):6316-6324.
APA	Zhang, Yuming,Yao, Meiqin,Sun, Guogang,Gao, Shiqiu,&Xu, Guangwen.(2014).Characteristics and Kinetics of Coked Catalyst Regeneration via Steam Gasification in a Micro Fluidized Bed.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(15),6316-6324.
MLA	Zhang, Yuming,et al."Characteristics and Kinetics of Coked Catalyst Regeneration via Steam Gasification in a Micro Fluidized Bed".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.15(2014):6316-6324.