Study on adsorptive capability of acid activated charcoal for desulphurization of model and commercial fuel oil samples

Shah, Syed Sikandar; Ahmad, Imtiaz; Ahmad, Waqas; Ishaq, Mohammad; Gul, Kashif; Khan, Razia; Khan, Hizbullah

doi:10.1016/j.jece.2018.06.008

Cited by 19 publications

(11 citation statements)

References 32 publications

(49 reference statements)

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“…When the adsorbent dosage exceeds 0.5 g, no further improvement in sulphur adsorption is noted as it reaches the equilibrium adsorption capacity. [ 33,34 ] Temperature is an important process parameter in any adsorption process. It significantly influences the equilibrium adsorption capacity and the rate of adsorption (Figure 6).…”

Section: Resultsmentioning

confidence: 99%

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Performance of geopolymer as adsorbent on desulphurization of heavy gas oil

2021

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Geopolymer is a porous aluminosilicate material and chemically similar to zeolites. As a low‐cost construction material, its suitability for adsorptive desulphurization (ADS) was studied using a petroleum feedstock. Geopolymer was produced by alkali activation of metakaolin and characterized by BET, NH3–TPD, SEM, FTIR, XRD, and XPS. The XRD and SEM studies evidenced the amorphous nature of geopolymer and the existence of macro‐ and mesopores. The XPS and NH3–TPD studies revealed the presence of surface Na and Al, and strong acid sites, respectively, in the prepared geopolymer. These sites interact with sulphur compounds of heavy gas oil through π‐π and acid–base interactions. The geopolymer showed a high sulphur adsorption capacity of 38.4 mg/g. The effects of adsorption parameters such as operating temperature, amount of adsorbent, and time for absorption on the adsorption capacity were examined using the Box–Behnken design statistical model. All three operating parameters significantly influenced the sulphur adsorption capacity of geopolymer. The adsorption of sulphur compounds on the geopolymer followed pseudo‐first‐order kinetics and did not affect its structural stability. Finally, the thermodynamic study revealed that adsorption of sulphur compounds on the geopolymer was spontaneous and exothermic.

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Section: Resultsmentioning

confidence: 99%

“…This is due to the exothermic nature of adsorption on the geopolymer. [ 34,35 ] The spent adsorbent recovered after adsorption was regenerated by washing with hexane in a Soxhlet extractor and dried at 110°C. This regenerated adsorbent was reused for ADS of HGO.…”

Section: Resultsmentioning

confidence: 99%

Performance of geopolymer as adsorbent on desulphurization of heavy gas oil

2021

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“…The effect of temperature on the adsorption capacity is dependent on whether the specific adsorption process is endothermic or exothermic Shah et alreported that by raising temperature from 25°C to 60°C, the DBT adsorption percentage of activated charcoal was reduced due to the exothermic nature of adsorption process. [ 258 ]…”

Section: Desulfurization Techniquesmentioning

confidence: 99%

“…[ 19,263 ] Regarding this, researchers tried surface modification methods such as acid activation, impregnation of mono or bimetals (Ni, Zr, Cu, Zn, Mn, Al, Sn, Ce, Fe, Co), oxidation for the development of surface oxygen functional groups and active metal sites. [ 255,256,258,264–272 ]…”

Section: Desulfurization Techniquesmentioning

confidence: 99%

MOFs for desulfurization of fuel oil: Recent advances and future insights

Saeed

Firdous

Zaman

et al. 2023

J Chinese Chemical Soc

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Nowadays, desulfurization of fuel oil has raised concern globally because of strict industrial and environmental legislations. Albeit hydrodesulfurization (HDS) has been extensively used in oil refineries to produce low sulfur oil (< 10 ppm) but not been proven as effective method for the removal of dibenzothiophene (DBT), benzothiophene (TH) and their derivatives. Subsequently, adsorptive desulfurization (ADS) and oxidative desulfurization (ODS) methods have been developed to achieve high removal efficiency. In the past decade, metal-organic frameworks (MOFs) and its composites as oxidative catalysts, as well as adsorbents, have attracted the researchers owing to high surface area, tunable properties, and reusable. The present review comprises use of MOFs and their composites for the removal of sulfur from fuel oil via ODS and ADS processes. Additionally, physicochemical properties of MOFs, mechanism, pros and cons of both process, regeneration, and future challenges have been discussed briefly. Moreover, current limitations and future prospective are also discussed.

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“…It was concluded that cobalt-incorporated, acetic-acid-activated GAC proves to be a potential adsorbent for the removal DBT from fuel in an economic and environmental friendly way. Shah et al [16] explored the selective desulfurization of model oil and the commercial kerosene and diesel using 37% concentrated HCl acid-modified activated charcoal (AC) as an adsorbent. The adsorption capacity of the AC was evaluated for the removal of DBT present in the fuel under certain experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive desulfurization of diesel using activated sewage sludge: kinetics, equilibrium and thermodynamics studies

2019

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Combustion of fossil fuels gives rise to sulfur oxides, which are harmful to the environment. Adsorptive desulfurization (ADS) of diesel was conducted using sewage sludge activated with H 2 O 2 as the oxidizing agent. A full 2 2 central composite response surface design was employed to determine optimum conditions for the production of activated sewage sludge (ASS). The adsorbent (ASS) was characterized using SEM, EDX and FTIR and the results of the analysis showed that it has the capacity to desulfurize diesel significantly. The ASS was subsequently used to conduct batch ADS of diesel with a view to investigate the kinetics, equilibrium and thermodynamics of the process. The optimum conditions established for the production of ASS using H 2 O 2 as the oxidizing agent were: temperature 400 °C and holding time 60 min. The Elovich model gave the best fit to the kinetic data of the ADS of diesel using ASS, while the equilibrium study showed that the Freundlich isotherm fitted the data at 35 °C better than Temkin and Langmuir isotherms. The positive values of the free energy and enthalpy changes revealed that the process was non-spontaneous and endothermic, respectively, while the negative entropy change is evidence of decrease in randomness of the adsorbed species. 33% desulfurization was achieved in 100 min during ADS of diesel showing that the adsorbent developed by activating SS with H 2 O 2 was very good and effective. Thus, ASS can be used to gain more insight into kinetics, equilibrium and thermodynamics of the ADS of middle-distillate petroleum fractions.

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Study on adsorptive capability of acid activated charcoal for desulphurization of model and commercial fuel oil samples

Cited by 19 publications

References 32 publications

Performance of geopolymer as adsorbent on desulphurization of heavy gas oil

Performance of geopolymer as adsorbent on desulphurization of heavy gas oil

MOFs for desulfurization of fuel oil: Recent advances and future insights

Adsorptive desulfurization of diesel using activated sewage sludge: kinetics, equilibrium and thermodynamics studies

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