Acidic sites and deep desulfurization performance of nickel supported mesoporous AlMCM-41 sorbents

Subhan, Fazle; Liu, B.S.

doi:10.1016/j.cej.2011.10.013

Cited by 74 publications

(34 citation statements)

References 40 publications

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“…The interaction of molecules containing sulfur heteroatoms in the supported catalysts based on oxides of titanium, nickel or palladium is expected to not occur in the same manner, considering that titanium is a hard acid 24 , whereas nickel and palladium are soft acids and this effect can strongly adsorb organic molecules with thiol or sulfide groups (soft bases).…”

Section: Resultsmentioning

confidence: 99%

“…Recent studies have indicated that the transition metals oxides are promising materials for these processes [22][23][24][25][26][27] . However, the use of these materials is limited because the specific surface area, volume and pore diameter are low.…”

Section: Resultsmentioning

confidence: 99%

“…Transition metallic oxides of the d-block are promising materials for the oxidative desulfurization process, however, their use is limited because of the specific superficial area, volume and small pore diameters 23,24 . The MCM-41 use as support for the nickel, palladium and titanium oxides enhanced the structural and textural properties of the oxides, promoting an increase in the contact area between the reactants (dibenzothiophene, hydrogen peroxide, molecular oxygen) and active phases (nickel, palladium and titanium oxides), responsible for the higher conversion of DBT.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the formation of organic sulfides on the surface for adsorption processes would result in blocking of acid sites in the pores, and hence, decrease in capacity to remove sulfur compounds 22 . Therefore, mesoporous materials of high surface area have been synthesized for use as catalyst support in order to address the shortcomings of d-block transition metals oxides [24][25][26] used for this purpose. The use of supported catalysts containing porous support with an appropriate textural property and containing an active phase based on oxides of the d-block transition metal has been developed.…”

Section: Resultsmentioning

confidence: 99%

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Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene

et al. 2013

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Textural and catalytic properties of nickel, palladium or titanium oxides supported on MCM-41 materials were evaluated in this paper. The results indicated that the MCM-41 material with well defined and highly ordered hexagonal structure was obtained. After metal ions impregnation and calcinations, the structure of MCM-41 was preserved and formed metallic oxide particles, however the decreased of surface area of these structures occurred. The catalysts studied showed maximum conversion levels of dibenzothiophene in the range of 50-65%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene

et al. 2013

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“…This motivates the use of alternative low-cost adsorbents for the desulfurization of diesel. The viability of adsorbents such as CAC (Jiang et al 2003;Zhou et al 2009), zeolites (Xiao et al 2008), mesoporous materials (Subhan and Liu 2011), carbon nanoparticles (Fallah and Azizian 2012), metal-organic frameworks (Khan and Jhung 2013;Achmann et al 2010), activated carbon cloth (Fallah and Azizian 2014), and nano-porous activated carbon (Triantafyllidis and Deliyanni 2014) has been explored by researchers for the desulfurization of diesel/model fuels/liquid fuels. The denitrogenation of diesel feedstock such as straight run gas oil (SRGO), coker gas oil (CGO), and light cycle oil (LCO) toward adsorptive desulfurization of diesel has also been tried by many researchers.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive desulfurization of feed diesel using chemically impregnated coconut coir waste

Ahmed

Ahmaruzzaman

2014

Int. J. Environ. Sci. Technol.

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This study reports the usage of chemically impregnated coconut coir waste (CICCW) as a low-cost adsorbent for the desulfurization of feed diesel. The characterization of the developed adsorbent was focused on quantitative analysis (carbon yield %, proximate, ultimate, carbon surface functionalities, BET surface area and porosity distribution, and particle size analysis), qualitative analysis (FTIR), and optical analysis (SEM). Batch experiments with feed diesel having a total sulfur concentration of 2,050 mg L -1 were conducted to optimize the adsorption parameters such as adsorbent dose, temperature, and contact time. The adsorption process shows an optimum dose of 1 g/20 mL, and the equilibrium is attained in 3 h. The adsorption of sulfur onto the adsorbent at optimum temperature 293 K is regulated by external mass transfer (diffusion into mesopores) followed by a steady adsorption phase with intra-particle diffusion in micropores. A Fickian mechanism controls the diffusion of sulfur molecules from the solution onto the surface of the adsorbent. Freundlich adsorption isotherm illustrates the equilibrium adsorption data very well. The negative value of DG°(-27.61 kJ mol -1 ) and DS°(-44.56 J K -1 mol -1 ) indicates the feasibility, spontaneity of the adsorption process and justified the decrease in the randomness of adsorbed sulfur molecules onto the adsorbent surface, respectively. The exhausted CICCW can be effectively regenerated by methanol and reutilized for three adsorption-desorption cycles. The approximate cost of preparation of the adsorbent was USD 10.714 per kg. These results clearly proved the feasibility of the developed lowcost adsorbent (CICCW) as a good candidate for the desulfurization of feed diesel.

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Metal‐organic frameworks for highly efficient adsorption of dibenzothiophene from liquid fuels

Tang

Huang

et al. 2016

AIChE Journal

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By taking desulfurization of liquid fuels as a demonstrative example, a bottom‐up selection was performed to find the metal‐organic frameworks (MOF)‐type adsorbents with highly efficient adsorption performance of large molecules. Through carefully analyzing the adsorption mechanism for typical S‐heterocyclic compounds like dibenzothiophene (DBT), PCN‐10 was selected in consideration of the simultaneous inclusion of several kinds of interactions in the framework. Experimental results demonstrate that this MOF exhibits extraordinary high DBT adsorption capacity (75.24 mg S g−1), showing record uptake among all the reported porous materials for the removal of thiophenicsulfur from fuels (below 1000 ppmwS), to the best of our knowledge. Moreover, the removal rate for the low sulfur concentration (50 ppmwS) can reach beyond 99%. This strategy can be conveniently extended to the screening and design of MOFs for the efficient removal of other important large guest molecules. © 2016 American Institute of Chemical Engineers AIChE J, 62: 4491–4496, 2016

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Acidic sites and deep desulfurization performance of nickel supported mesoporous AlMCM-41 sorbents

Cited by 74 publications

References 40 publications

Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene

Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene

Adsorptive desulfurization of feed diesel using chemically impregnated coconut coir waste

Metal‐organic frameworks for highly efficient adsorption of dibenzothiophene from liquid fuels

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