Desulfurization of Heavy Oil with Iron Oxide-based Catalysts Using Steam

Fumoto, Eri; Sato, Shinya; Takanohashi, Toshimasa

doi:10.1627/jpi.58.336

Cited by 7 publications

(15 citation statements)

References 7 publications

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“…Oil The hydrogen and oxygen species derived from steam might also react with the sulfur compounds contained in heavy oil. Desulfurization of AR with the Zr _ Al _ FeOx catalyst with and without steam was examined at 748 K. Figure 7 shows the sulfur contents after AR cracking using the Zr _ Al _ FeOx catalyst 15) . Concentrations of sulfur in liquid products, hydrogen sulfide and sulfur dioxide in gas products, and sulfur in residue were analyzed by oxidative microcoulometry according to JIS K 2541-2, gas detecting tubes (GASTEC Corp.), and elemental analysis (EA1110, Finningan Mat.…”

Section: Effect Of Steam On Desulfurization Of Heavymentioning

confidence: 99%

“…7). Figure 8 shows the relationship between the yields of hydrogen sulfide and carbon dioxide for the catalytic cracking of AR 15) . The yield of hydrogen sulfide increased in proportion to that of carbon dioxide except in the reaction without steam.…”

Section: Effect Of Steam On Desulfurization Of Heavymentioning

confidence: 99%

“…To examine the desulfurization of thiophene compounds, catalytic cracking of dibenzothiophene (DBT) with the Zr _ Al _ FeOx catalyst (W 0-3.0 10 -3 kg) was conducted at 748 K with steam (FS 2.9 10 -3 kg/h) 15) . Approximately 1 wt% solution of DBT dissolved in benzene was fed into the fixed-bed reactor (F 1.1 10 -3 kg/h).…”

Section: Desulfurization Of Thiophene Compoundsmentioning

confidence: 99%

“…Approximately 1 wt% solution of DBT dissolved in benzene was fed into the fixed-bed reactor (F 1.1 10 -3 kg/h). Figure 9 shows the conversion of DBT calculated from the amount of unreacted DBT 15) . DBT conversion increased with higher time factor, W/F, which is the ratio of catalyst weight to flow rate of feedstock.…”

Section: Desulfurization Of Thiophene Compoundsmentioning

confidence: 99%

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Upgrading of Heavy Oil with Steam Using Iron Oxide-based Catalyst

Fumoto

2018

J. Jpn. Petrol. Inst.

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Heavy oil, such as petroleum residual oil, requires upgrading for use in the production of transportation fuels in the petroleum industry. Heavy oil has low hydrogen to carbon (H/C) ratio and high viscosity, and contains impurities such as sulfur and metals. Various conventional upgrading processes including coking, visbreaking, hydrotreating, hydrocracking, residue fluid catalytic cracking (RFCC), and deasphalting have been developed 1). Hydrogen addition is useful to convert heavy oil to light fractions with high H/C ratio and low sulfur content, resulting in lower coke yield, but hydrogen is expensive. Water has good potential as a hydrogen source for the upgrading of heavy oil. Upgrading of heavy oil with water requires the following catalyst properties: high activity to decompose heavy oil, stable activity under severe hydrothermal or steam conditions, and resistance to deposition of coke, sulfur, and metals. Upgrading of heavy oil with water has been reported using various catalysts, such as nickel potassium 2) 4) , cerium oxide 5),6) , titania _ zirconia 7) , and iron oxide 8) 21). Iron oxide is inexpensive and is a candidate catalyst for industrial upgrading of heavy oil with water. We previously developed a zirconia-supporting iron oxide catalyst to decompose petroleum residual oil under a steam atmosphere 8). The physical durability of the catalyst was enhanced by addition of aluminum to iron oxide 9),10). Upgrading of oil sand bitumen was investigated with iron oxide-based catalysts using suband super-critical water 17). Catalytic cracking of petroleum residual oil can be achieved with silicasupported iron oxide catalysts in supercritical water 16). Steam catalytic cracking of petroleum residual oil is possible using zirconia-impregnated macro-mesoporous red mud, which contains iron oxide and alumina 18),19). This review examines catalytic cracking of heavy oil using iron oxide-based catalysts containing zirconium and aluminum under a steam atmosphere. 2. Catalytic Cracking of Heavy Oil with Steam 2. 1. Oxidative Cracking of Heavy Oil Catalytic cracking of atmospheric residual oil (AR) with steam was conducted at 748 K under atmospheric pressure using a fixed-bed reactor. Figure 1 shows the schematic experimental apparatus 11). A complex metal oxide catalyst was prepared by a coprecipitation method using a water solution of iron chloride, aluminum chloride, and zirconium oxychloride. The catalyst was treated at 873 K for 1 h under a steam atmosphere and sieved to obtain particles of 300-850 μm. The molar composition of the catalyst was Zr/Fe 0.063, Al/Fe 0.13, abbreviated as Zr _ Al _ FeOx. The obtained cata-323

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Section: Effect Of Steam On Desulfurization Of Heavymentioning

confidence: 99%

Section: Effect Of Steam On Desulfurization Of Heavymentioning

confidence: 99%

Section: Desulfurization Of Thiophene Compoundsmentioning

confidence: 99%

Section: Desulfurization Of Thiophene Compoundsmentioning

confidence: 99%

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Upgrading of Heavy Oil with Steam Using Iron Oxide-based Catalyst

Fumoto

2018

J. Jpn. Petrol. Inst.

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“…The remaining hydrogen species might react with sulfur compounds in AR and be supplied to form H 2 S [10]. Hence, desulfurization of AR with the catalyst in a steam atmosphere was examined in this section.…”

Section: Activity Of α-Fe 2 O 3 Catalyst Containing Zr and Al For Desmentioning

confidence: 99%

Iron Oxide-Based Catalyst for Catalytic Cracking of Heavy Oil

Fumoto¹,

Sato²,

Takanohashi³

2018

Iron Ores and Iron Oxide Materials

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This chapter describes an iron oxide catalyst containing Zr and Al for production of light hydrocarbons by catalytic cracking of petroleum residual oil in a steam atmosphere. The catalyst was hematite structure and useful for decomposition and desulfurization of residual oil. After lattice oxygen of iron oxide reacted with heavy oil fraction of residual oil, oxygen species generated from steam were supplied to iron oxide lattice and reacts with heavy oil fraction, producing light hydrocarbons and carbon dioxide. When the oxygen species were generated from steam, hydrogen species were simultaneously generated from steam. The hydrogen species were transferred to light hydrocarbons, hydrogen sulfide, and residue deposited on the catalyst. Supplies of the hydrogen species to light hydrocarbons suppressed alkene generation. Generation of hydrogen sulfide indicated decomposition of sulfur compounds of residual oil. The sulfur concentration of product oil decreased compared to the concentration of residual oil. Some oxygen species could be transferred to sulfur dioxide. Accordingly, hydrogenation and oxidation by the hydrogen and oxygen species derived from steam provided the decomposition and desulfurization of residual oil with the iron oxide-based catalyst in a steam atmosphere.

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Sustainable development and enhancement of cracking processes using metallic composites

et al. 2021

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Metallic composites represent a vital class of materials that has gained increased attention in crude oil processing as well as the production of biofuel from other sources in recent times. Several catalytic materials have been reported in the literature for catalytic cracking, particularly, of crude oil. This review seeks to provide a comprehensive overview of existing and emerging methods/technologies such as metal–organic frameworks (MOFs), metal–matrix composites (MMCs), and catalytic support materials, to bridge information gaps toward sustainable advancement in catalysis for petrochemical processes. There is an increase in industrial and environmental concern emanating from the sulphur levels of oils, hence the need to develop more efficient catalysts in the hydrotreatment (HDS and HDN) processes, and combating the challenge of catalyst poisoning and deactivation; in a bid to improving the overall quality of oils and sustainable use of catalyst. Structural improvement, high thermal stability, enhanced cracking potential, and environmental sustainability represent the various benefits accrued to the use of metallic composites as opposed to conventional catalysts employed in catalytic cracking processes.

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Desulfurization of Heavy Oil with Iron Oxide-based Catalysts Using Steam

Cited by 7 publications

References 7 publications

Upgrading of Heavy Oil with Steam Using Iron Oxide-based Catalyst

Upgrading of Heavy Oil with Steam Using Iron Oxide-based Catalyst

Iron Oxide-Based Catalyst for Catalytic Cracking of Heavy Oil

Sustainable development and enhancement of cracking processes using metallic composites

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