Upgrading of vacuum residue with chemical looping partial oxidation over Ce doped Fe2O3

Wang, Dechao; Jin, Lijun; Li, Yang; Yao, Demeng; Wang, Jiaofei; Hu, Haoquan

doi:10.1016/j.energy.2018.08.038

Cited by 29 publications

(6 citation statements)

References 80 publications

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“…Mo and Ce derived from the precursor salts ammonium heptamolybdate tetrahydrate and cerium nitrate hexahydrate were loaded onto the support through impregnation, and the catalyst was then calcined at 550 °C for 2 h. The nominal loading of Mo and Ce were 10 wt% (weight percentage) and 5 wt%, respectively. After the calcination process, the Mo and Ce active components are mainly in oxide forms (i.e., MoO 3 and CeO 2 ), which has been confirmed in previous studies and are thus used in DFT calculations 47 , 48 , 51 . The prepared MoCe/ZSM-5 catalyst was designed and optimized in this study for methane-assisted oil upgrading and thus labeled as MOU.…”

Section: Methodssupporting

confidence: 68%

“…NH 3 -type ZSM-5 zeolite support with the SiO 2 to Al 2 O 3 ratio of 23:1 purchased from Zeolyst, USA was converted to H-type through calcination at 550 °C in static air for 5 h. Mo is reported to facilitate the asymmetrical decomposition of methane through the carbenium (CH 3 + ) pathway 48 . Ce is reported to provide oxygen vacancies and inhibit coke formation 51 . These metals were thus selected and optimized as the active components for the catalyst.…”

Section: Methodsmentioning

confidence: 99%

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The interactive role of methane beyond a reactant in crude oil upgrading

et al. 2021

Commun Chem

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Crude oil upgrading under methane has been reported to be an economically and environmentally promising process, while the advantageous effect of methane beyond a reactant is not fully explained. In this work, the catalytic performances, physicochemical properties and regenerability of used catalysts after crude oil upgrading under methane and nitrogen are investigated by n-butylbenzene model compound studies, catalyst characterizations and density functional theory calculations. Comparing to nitrogen, methane exhibits a protective effect on the charged catalyst despite the limited conversion, leading to better product quality and catalyst stability. This protective effect is attributed to the interaction between methane and catalytic active sites, which mainly occurs in the internal pores of the zeolitic catalyst support, resulting in unique coke distribution and inhibition of metal deposition. The interactive role of methane beyond a reactant, which is previously underestimated, is suggested to be critical for better performances of catalysts in relevant reaction processes.

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Section: Methodssupporting

confidence: 68%

Section: Methodsmentioning

confidence: 99%

The interactive role of methane beyond a reactant in crude oil upgrading

et al. 2021

Commun Chem

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“…It is crucial to study the heavy crude properties which is influenced by its heavy components [1]. Most of the major oil companies started looking for developing and resolving challenges of heavy oil fields in the world through studying subsurface, production operations and transportation to marketing, more specifically to develop the heavy oil industry globally, especially when considering that the unconventional crudes are making around 70% of the world hydrocarbon reserves [2].…”

Section: -Introductionmentioning

confidence: 99%

Cold Cracking Technology for Crude Oil Upgrading in Qaiyarah Heavy Oil Field; Technical and Economical Evaluation

Bibani

Alhaleem

Sharifi

2023

IJCPE

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Heavy oil is classified as unconventional oil resource because of its difficulty to recover in its natural state, difficulties in transport and difficulties in marketing it. Upgrading solution to the heavy oil has positive impact technically and economically specially when it will be a competitive with conventional oils from the marketing prospective. Developing Qaiyarah heavy oil field was neglected in the last five decades, the main reason was due to the low quality of the crude oil resulted in the high viscosity and density of the crude oil in the field which was and still a major challenge putting them on the major stream line of production in Iraq. The low quality of the crude properties led to lower oil prices in the global markets as well as the high operation cost of production and transportation. The purpose of this paper is testing new technology applications on an Iraqi Heavy Oil Field and specifically (Qaiyarah Oil Field) by applying the cold cracking technique to upgrade Qaiyarah heavy oil properties through using series of electrical/ mechanical activities applied on the heavy crude that generates special kind of vibrations to re-structure the (H-C) bonds in the heavy oil to convert it to lighter crude with lower viscosity/ density which was the outcome of the distillation by reducing the unsaturated components and isolating the minerals and sulfur as sold components. The results were very optimistic, where the density has improved from 16 to 30.5 API degree, sulfur content has reduced from 6.4 to 1.507 weight percent and selling price per barrel would increase by 53% compare to 2.31% cost increment due to the upgrading operation. Therefore, applying the cold cracking technology is convenience for improving Qaiyarah oil properties as the main production stream line will be increased in Iraq.

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“…Without changing the valence state of Fe 3+ , the surface of the nanoparticles adsorbs oxygen, thereby improving its chemical properties. It was worth noting that Wang et al [13]. Substituted Fe in α-Fe 2 O 3 structure by Ce to form a solid solution.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ce Doping on the Structure and Chemical Stability of Nano-α-Fe2O3

et al. 2019

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Ce-doped nano-α-Fe2O3 was successfully synthesized via the hydrothermal method. The properties of the prepared particles were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS) and electrochemical methods. It was found that the Ce element can be doped into the α-Fe2O3 lattice resulting in lattice distortion, which can refine the grain and improve the crystal surface’s integrity significantly. In addition, doping of Ce element can shorten the Fe–O bond length in the α-Fe2O3 crystal, cause a blue shift of the stretching vibration band, enhance binding energy of Fe–O and the chemical stability of the α-Fe2O3 crystal.

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Upgrading of vacuum residue with chemical looping partial oxidation over Ce doped Fe2O3

Cited by 29 publications

References 80 publications

The interactive role of methane beyond a reactant in crude oil upgrading

The interactive role of methane beyond a reactant in crude oil upgrading

Cold Cracking Technology for Crude Oil Upgrading in Qaiyarah Heavy Oil Field; Technical and Economical Evaluation

Effect of Ce Doping on the Structure and Chemical Stability of Nano-α-Fe2O3

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