Adsorptive desulfurization of thiophene, benzothiophene and dibenzothiophene over activated carbon manganese oxide nanocomposite: with column system evaluation

Saleh, Tawfik A.; Sulaiman, Kazeem O.; AL-Hammadi, Saddam A.; Dafalla, Hatim; Danmaliki, Gaddafi I.

doi:10.1016/j.jclepro.2017.03.169

Cited by 219 publications

(97 citation statements)

References 44 publications

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“…It can be concluded that since a higher adsorbent amount provides more adsorption sites leading to increased adsorption of DBT molecules, hence the % sulfur removal is enhanced , . However, beyond 1.0 g of AC 50 , equilibrium is established between AC 50 surface and DBT, referred to as overcrowding of particles, due to which no appreciable increase in the DBT removal is observed .…”

Section: Resultsmentioning

confidence: 99%

Desulfurization of Model Oil through Adsorption over Activated Charcoal and Bentonite Clay Composites

et al. 2020

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Adsorption of dibenzothiophene (DBT) from model oil was investigated using composites of pure activated charcoal and pure bentonite clay. DBT adsorption was carried out in batch mode experiments at laboratory scale, where the developed composite materials showed a synergistic effect in removal of DBT from the model oil in terms of improved surface acidity of the pure activated charcoal and mesoporous structure of the pure bentonite clay. Thermodynamics, kinetics, and optimization of various adsorption parameters were investigated. Kinetic analyses proved that DBT adsorption followed pseudo‐second‐order kinetics. To study the thermodynamics of the adsorption, different isotherm adsorption models were applied. The Langmuir isotherm best fitted to the adsorption data. Various thermodynamic parameters were evaluated, including Gibbs free energy, entropy, and enthalpy.

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Section: Resultsmentioning

confidence: 99%

Desulfurization of Model Oil through Adsorption over Activated Charcoal and Bentonite Clay Composites

et al. 2020

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“…An increase in the mixing time (reaction time) from 30-50 min of the oxidation process, the removal of sulfur content was increased as shown in in Figure 7a, b, and c. The maximum conversion based on the ODS reactions was found to be at 50 min reaction time and 190 ºC (reaction temperature) with 70.52% of the sulfur removed using 1 g of the prepared catalyst Increasing the reaction time leading to increase the contact time between the sulfur compounds found in the feedstock and the oxygen dissolved as well as the surface area of the prepared Nano-catalyst giving high residence time for the purpose of converting sulfur to sulfone or sulfoxide [25]. However, at long time, the observed adsorption capacities in such oxidation reactions of the trend sulfur is probably reflected upon the accessible adsorption surface due to the presence of micro-meso porosity as revealed in the textural properties of the prepared catalyst (18% ZnO/nano--Al2O3).…”

Section: Reaction Timementioning

confidence: 98%

Design of a Synthetic Zinc Oxide Catalyst over Nano-Alumina for Sulfur Removal by Air in a Batch Reactor

Nawaf

Jarullah

Abdulateef

2018

Bull. Chem. React. Eng. Catal.

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Owing to the environmental regulations with respect to sulfur content and continuing challenges of finding a suitable catalyst of such impurity, a driving force for the development of more efficient technologies a deep research on new oxidative catalysts is considered an important issue in fuel quality improvement. Thus, the present study shows a novel percent of nano-catalyst with 18% zinc oxide (ZnO) of active component over nano-alumina that has not been reported in the public domain for sulfur removal from kerosene fuel by air (oxidative desulfurization (ODS) method). Where, such percent of the active component on the nano-alumina helps to add one or two atoms of oxygen to sulfur content in the kerosene. The nano-catalyst (ZnO/nano-alumina-particles composite) is prepared by precipitation of zinc oxide and loaded over nano-alumina in one-step. The activity of the prepared catalyst was tested utilizing ODS process of kerosene fuel by air in a batch reactor. A set of experiments were conducted with a wide range of operating conditions, where the reaction temperature was ranged from 150 to 190 ºC, the reaction time from 30 to 50 min and the catalyst weight from 0.4 to 1 g. The experimental results showed that the chemical nature of zinc oxides showed higher conversion (70.52%) at reaction temperature of 190 ºC, reaction time of 50 min, and 1 g catalyst weight used in the batch reactor. A kinetic model related to the sulfur removal from kerosene via ODS process in the batch reactor was also investigated in this study for the purpose of estimating the best kinetic parameters of the relevant reactions. The results showed that the prepared catalyst (ZnO over nanoalumina) can be applied confidently to reactor design, operation and control in addition to improve the fuel quality. Following the kinetic model of ODS process, a very well agreement between the experimental and predicted results is obtained. lations were reported that the maximum sulfur content should not be currently exceeded 0.005 wt%, and less than 0.0015 wt% or nil (freesulfur content) in the coming years [2][3][4]. The main source of air pollution is attributed to the generation of sulfur oxides by the combustion process leading to form acid rain. The oxidation desulfurization process used for removal all types of sulfur in fuel is expected to solve great environmental problems occurring wherever different petroleum fractions are used [5]. The

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“…The chemical interaction is relevant to promote the adsorption and removal of heavy metals. The study by Saleh [51] shows that there is ion exchange methods for biosorption, membrane techniques, precipitation, among others, which show low adsorption performance to remove aluminum. The research by Saleh [13] indicates better results with nanocomposite of activated carbon/magnetic tungsten.…”

Section: Chemical Interactionmentioning

confidence: 99%

Proposal to Reuse Rubber Waste from End-Of-Life Tires Using Thermosetting Resin

et al. 2019

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Due to the increasing production of motor vehicles, a large amount of waste with different characteristics and compositions is generated, notably end-of-life tires, which are harmful to the environment when not properly disposed. Their composition contains contaminating chemical elements, resulting in negative impacts on the environment. This research aims to present a process that favors the recycling of rubber waste from end-of-life tires. For the construction of the state of the art and state of the technique, a review of the literature on end-of-life tire rubber, and a search on Google Patents and Espacenet was done using Methodi Ordinatio. For the experimental work, samples were made using concentrations of 20%, 40%, and 60% of end-of-life tire rubber particles, with the addition of thermoset polymeric matrix of isophthalic polyester resin, catalyst, and dyes. In order to evaluate the quality of the mixture, some tests with the material resulting from the mixture were performed: Izod impact strength, Shore D hardness, immersion density determination, flexural strength, and scanning electron microscopy analysis. The results from the tests indicate that the composition with 60% of rubber particles had better mechanical results than samples containing 20% and 40%. The tests also show that end-of-life tire particles promote chemical adsorption (interaction) with the thermoset polymer matrix, favoring the mechanical properties. The final results of this research are: the literature review and the search on granted patents showed that this study is original; the experimental work suggests that practical applications are possible, generating a new product, harder with a proportion of 60% of rubber particles, as indicated by the tests, with a smooth surface that does not require polishing. Thus, this research is characterized as innovative as well as having sustainable characteristics.

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Adsorptive desulfurization of thiophene, benzothiophene and dibenzothiophene over activated carbon manganese oxide nanocomposite: with column system evaluation

Cited by 219 publications

References 44 publications

Desulfurization of Model Oil through Adsorption over Activated Charcoal and Bentonite Clay Composites

Desulfurization of Model Oil through Adsorption over Activated Charcoal and Bentonite Clay Composites

Design of a Synthetic Zinc Oxide Catalyst over Nano-Alumina for Sulfur Removal by Air in a Batch Reactor

Proposal to Reuse Rubber Waste from End-Of-Life Tires Using Thermosetting Resin

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