Desulfurization of FCC Gas Oil by Solvent Extraction, Photooxidation, and Oxidizing Agents

Ibrahim, Aladin; Xian, S. B.; Zhou, Wei

doi:10.1081/lft-120024387

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…138 The conceptual model of the oxidation step in the UAOD process may be depicted as a catalytic cycle, as depicted in Fig. [148][149] Hirai et al 143 investigated photodecomposition of DBTs dissolved in tetradecane by the use of a highpressure mercury lamp (l > 280 nm). [139][140][141] It consists of four basic steps: First, the metal precursor (simply represented as W(O) n ), is peroxidized and disaggregated to form anionic peroxometal complex as W(O 2 ) n in the presence of excess H 2 O 2 , phosphotungstic acid; second, quaternary ammonium salts such as Oc 4 N + Br 2 with large lipophilic cation function as PTA, and transfer the peroxometal anion into organic phase; third, organic sulfur compounds such as DBT get oxidized by the peroxometal complex with high efficiency and high selectivity; lastly, the reduced oxo species, which dissociate with PTA, returns to aqueous phase and restores the catalytic cycle.…”

Section: Ultrasound Assisted Odsmentioning

confidence: 99%

“…102 A high pressure mercury lamp (l > 280 nm) has been used for desulfurization by direct photo-oxidation, 143,144,146 gasoline 147 and gas oil. [148][149] Hirai et al 143 investigated photodecomposition of DBTs dissolved in tetradecane by the use of a highpressure mercury lamp (l > 280 nm). The decomposed products were removed to the water phase as SO 4 22 at conditions of room temperature and atmospheric pressure.…”

Section: Ultrasound Assisted Odsmentioning

confidence: 99%

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An evaluation of desulfurization technologies for sulfur removal from liquid fuels

2012

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Sulfur compounds represent one of the most common impurities present in the crude oil. Sulfur in liquid fuel oil leads directly to the emission of SO 2 and sulfate particulate matter (SPM) that endangers public health and community property; and reduces the life of the engine due to corrosion. Furthermore, the sulfur compounds in the exhaust gases of diesel engines can significantly impair the emission control technology designed to meet NO x and SPM emission standards. The research efforts for developing conventional hydrodesulfurization and alternative desulfurization methods such as selective adsorption, biodesulfurization, oxidation/extraction (oxidative desulfurization), etc. for removing these refractory sulfur compounds from petroleum products are on the rise. Research laboratories and refineries are spending huge amounts of money in finding a viable and feasible solution to reduce sulfur to a concentration of less than 10 mg l 21 . This paper reviews the current status in detail of various desulphurization techniques being studied worldwide. It presents an overview of novel emerging technologies for ultra-deep desulfurization so as to produce ultra-lowsulfur fuels.

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Section: Ultrasound Assisted Odsmentioning

confidence: 99%

Section: Ultrasound Assisted Odsmentioning

confidence: 99%

An evaluation of desulfurization technologies for sulfur removal from liquid fuels

2012

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“…[42] Ther esults indicated the following desulfurization trend:D BT < 4-MDBT < 4,6-DMDBT,w hich is oppositet ot hat observed in the commercial HDS process.O ne more advantagei st hat no organic solventw as needed to clean up the oxidized byproducts. [52][53][54][55] In alengthy OD procedure,H 2 O 2 combined with UV irradiation (4-phenylbenzophenone was added to improve photooxidation) was employed to remove DBT from 2000 mg kg À1 light fuel with 98 %e fficiency. [43]…”

Section: Photo-oxidation Of Organosulfur Compounds Prior To Extractionmentioning

confidence: 99%

Conventional and Upcoming Sulfur‐Cleaning Technologies for Petroleum Fuel: A Review

et al. 2016

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Environmental regulations on the quality of liquid fuels continue to create more requirements to produce a near‐to‐zero sulfur content. The hydrodesulfurization process has a high running cost and suffers from incomplete removal of sulfur compounds, particularly alkylated dibenzothiophene. Recently, oxidative and adsorption desulfurization procedures showed high potential to take part in commercial desulfurization. The advantages and disadvantage of the newly proposed procedures are outlined and reviewed. Undoubtedly, adsorptive‐based methods have achieved many advances in this area. Particularly, surface imprinted polymers and metal–organic frameworks have manifested an excellent tendency to remove bulky sulfur compounds with minimum experimental effort. This review presents information about the workability, efficiency, and mechanisms of the current desulfurization methodologies for diesel as a common transportation fuel. More attention is given to adsorptive desulfurization as a promising technology.

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“…However, the main challenge in adsorptive desulfurization is the choice of the adsorbents which should have high desulfurization capacities and should be thio-selective over olefinic and aromatic compounds at the same time. Zeolites emerged as one of the possible alternative adsorbents for adsorptive desulfurization. − They have high mechanical and thermal stabilities, and are size-selective for adsorptive desulfurization. Several studies on adsorption desulfurization for liquid fuels have been performed with different materials such as activated carbon, activated aluminas, meso-silicas, silica–zirconia cogel, zeolites, ion exchange resins, Ti-HMSs, Ni-based adsorbents and NiMos, mesoporous materials (MSU-S) and cobalt, iron, and chromium (Fe 2 O 3 -MSU-S and CrO 2 -MSU-S), cerium, phosphotungstic acid (HPW) and nickel oxide-HPW (NiO-HPW) modified (MSU-S), and acid-treated activated carbon.…”

Section: Introductionmentioning

confidence: 99%

Batch and Continuous Adsorptive Desulfurization of Model Diesel Fuels Using Graphene Nanoplatelets

et al. 2020

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An experimental investigation on adsorptive desulfurization for model diesel fuels (MDFs) is described using graphene nanoplatelets (GNPs) as an adsorbent. Batch experiments for a single component as well as a multicomponent system were conducted. The single-component adsorption isothermal experimental results for the batch process were well represented by the Freundlich isotherm (thiophene (T), 2-methylthiophene (2-MT)) and the Langmuir isotherm (dibenzothiophene (DBT)) models. The adsorption process kinetics fits with the pseudosecond-order model for T, 2-MT, and DBT on GNPs. Both surface and pore diffusions controlled the sorption process. A process design of a single-stage batch-adsorber for the adsorption of T, 2-MT, and DBT onto GNPs was also studied using the calculated adsorption isotherm parameters. In addition, a fixed-bed adsorber was used for studying the continuous system at ambient conditions for multicomponent MDFs. The main objective of continuous studies was to investigate the process variables' effect on the desulfurization. The effect of flow rate, bed height, and initial sulfur concentration on the adsorptive capacity of the adsorbent for T, 2-MT, and DBT were evaluated. The breakthrough time and adsorptive capacity increased with increasing the bed height and decreasing the flow rate and initial sulfur concentration. For continuous studies, more than 90% of the bed was saturated for all thiocompounds within 100 min for the feed flow rate of 3 mL/min and adsorbent weight of 3 g. The Adam−Bohart model was used to check the performance of the adsorption breakthrough curves. The Adam−Bohart model rate constant and adsorption capacity were found to be 0.006 (mg/kg) −1 h −1 and 117.21 mg S/kg, respectively.

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Desulfurization of FCC Gas Oil by Solvent Extraction, Photooxidation, and Oxidizing Agents

Cited by 9 publications

References 2 publications

An evaluation of desulfurization technologies for sulfur removal from liquid fuels

An evaluation of desulfurization technologies for sulfur removal from liquid fuels

Conventional and Upcoming Sulfur‐Cleaning Technologies for Petroleum Fuel: A Review

Batch and Continuous Adsorptive Desulfurization of Model Diesel Fuels Using Graphene Nanoplatelets

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