Behavior of sulfur species present in atmospheric residue in fluid catalytic cracking

Mizutani, Hiroshi; Korai, Yozo; Mochida, Isao

doi:10.1016/j.fuel.2007.02.030

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…Although the determination of chlorine in this matrix is prone to some problems, the literature data for VR digestion is very scarce. There are only a few works related to element determination, but practically all of them are devoted for sulfur, , metals, and determination of saturates, aromatics, resins, and asphaltenes . However, despite its relevance, chlorine determination in this kind of samples was not found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Pereira¹,

Mello²,

Duarte³

et al. 2009

Energy Fuels

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The microwave-induced combustion (MIC) method was applied for digestion of crude oil vacuum distillation residue for further chlorine determination. Ignition was performed by microwave radiation using a microwave oven designed for conventional pressurized wet digestion. Combustion was carried out using 20 bar of oxygen and NH 4 NO 3 as the igniter. Water or H 2 O 2 , Na 2 CO 3 , and (NH 4 ) 2 CO 3 solutions were investigated for analyte absorption as well as the necessity of a reflux step. Digests were suitable to be analyzed by inductively coupled plasma optical emission spectrometry and ion chromatography. Accuracy was evaluated using spiked samples and certified reference materials of coal (BCR 181) and fuel oil (NIST 1634c). Recoveries for Cl were in the range of 98.4-100.2% for all investigated solutions using the reflux step. The agreement with certified values was better than 95% using 25 mmol L -1 (NH 4 ) 2 CO 3 as the absorbing solution and reflux step. Poor recoveries for Cl were observed using microwave-assisted wet digestion and water extraction procedures. Residual carbon content for MIC was below 1%, whereas it was about 20% using microwave-assisted wet digestion. Using MIC, up to 400 mg of sample could be decomposed and digestion was complete in less time (5 min for combustion and 20 min for cooling) in comparison to other conventional procedures (more than 1 h). Up to eight samples could be digested simultaneously, making the proposed procedure suitable for further routine Cl determination in oil refineries.

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Section: Introductionmentioning

confidence: 99%

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Pereira¹,

Mello²,

Duarte³

et al. 2009

Energy Fuels

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“…However, processing these above-mentioned feedstocks would inevitable produce petroleum residue a large amount. Thermal processing method for conversion these residues mainly include the hydrogenation [1], visbreaking [2], fluid catalytic cracking (RFCC) [3,4], coking (i.e., delayed coking, flexi-coking and fluid coking) [5,6]. In some condition, several conversion methods combinations are also possible [7].…”

Section: Introductionmentioning

confidence: 99%

Bifunctional catalyst cracking gasification of vacuum residue for coproduction of light olefins and H2-rich syngas

Tang¹,

Tian²,

Qiao³

2017

Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017)

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Abstract. The residue cracking gasification process is intended to convert vacuum residue into light olefins by cracking and co-production the H 2 -rich syngas by gasifying the cracking-generated coke. In this paper, a bifunctional base catalyst is used and tested vacuum residue cracking gasification in a fluidized bed reactor in comparison with the effects over FCC catalyst and SiO 2 . The result shows that higher light olefins yield is produced with Ca 12 Al 7 as the cracking catalyst in comparison with that over the FCC catalyst and SiO 2 . The coke over the Ca 12 Al 7 catalyst is gasified well at 800 o C in steam. The content of H 2 is about 55.5 vol% and with the content of CH 4 is less than 0.2 vol% when compared to 36.6 and 2.4 vol% over the FCC catalyst, respectively.

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“…Therefore, there is a considerable focus on research methods to transform the heavy oil feedstock into light. The current technologies proposed to process the residues include hydrocracking, visbreaking, residue fluid catalytic cracking, , and coking (including flexi-coking, delayed coking, and fluid coking) − as well as combined processing technologies . The application of hydrocracking technology is limited because of high investment and operating costs.…”

Section: Introductionmentioning

confidence: 99%

Light Products and H₂-Rich Syngas over the Bifunctional Base Catalyst Derived from Petroleum Residue Cracking Gasification

et al. 2016

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Vacuum residue is utilized by a process involving the residue cracking and coke gasification regeneration. In this process, vacuum residue is first converted into the products of light olefins and light oils by catalytic cracking, and then the cracking-generated coke is gasified into H2-rich syngas by using a bifunctional base catalyst. Their cracking gasification effects of vacuum residue are studied in a dual fluidized bed reactor. The results show that the solid base catalysts could enhance light olefin yield (have high olefinicity) and inhibit the formation of coke in comparison with silica sand and a hydrothermal treatment zeolite catalyst (FCC catalyst). Furthermore, the catalyst prepared at a CaO/Al2O3 molar ratio of 12:7 displayed a better cracking effect than the one produced at the molar ratio of 1:1. The effects of the reaction temperature and the catalyst-to-oil ratio on the distribution of cracking liquid from vacuum residue solid base cracking are discussed. The results showed that the heavy oil conversion of more than 93.0%, the light oil yield of about 81.0 wt %, the coke of ca. 5.2 wt %, and the C2–C3 olefinicity of higher than 53.0% are achieved by cracking at 700 °C with a catalyst-to-oil ratio of 7.0. The coke over solid base catalyst is well gasified at 800 °C in an atmosphere of steam–oxygen. The content of H2 is about 55.5 vol % and with the CH4 content of less than 0.2 vol % in comparison with 36.6 and 2.4 vol % over the FCC catalyst, respectively. The cracking effects of solid base catalysts are stable via a few cycles process, although a decrease in catalytic effect is observed.

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Behavior of sulfur species present in atmospheric residue in fluid catalytic cracking

Cited by 15 publications

References 22 publications

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Bifunctional catalyst cracking gasification of vacuum residue for coproduction of light olefins and H2-rich syngas

Light Products and H₂-Rich Syngas over the Bifunctional Base Catalyst Derived from Petroleum Residue Cracking Gasification

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Behavior of sulfur species present in atmospheric residue in fluid catalytic cracking

Cited by 15 publications

References 22 publications

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Feasibility of Microwave-Induced Combustion for Digestion of Crude Oil Vacuum Distillation Residue for Chlorine Determination

Bifunctional catalyst cracking gasification of vacuum residue for coproduction of light olefins and H2-rich syngas

Light Products and H2-Rich Syngas over the Bifunctional Base Catalyst Derived from Petroleum Residue Cracking Gasification

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Product

Resources

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Light Products and H₂-Rich Syngas over the Bifunctional Base Catalyst Derived from Petroleum Residue Cracking Gasification