Optimisation of extractive desulfurization using Choline Chloride-based deep eutectic solvents

Almashjary, Khalid Hussein Omar; Khalid, Mohammad; Dharaskar, Swapnil; Jagadish, Priyanka; Walvekar, Rashmi; Gupta, T. C. S. M.

doi:10.1016/j.fuel.2018.08.005

Cited by 89 publications

(44 citation statements)

References 18 publications

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“…When the amount of extractant increases, the predicted point lies at the red-yellow region, signalling a relatively high EE. The contour plot reported by Mokthar et al and Almashjary et al also confirmed the prediction of optimum point for extractant to oil volume ratio [19,37]. as the volume ratio reached 1.55.…”

Section: Effect Of Des Volume Ratiosupporting

confidence: 69%

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Liquid Polymer Eutectic Mixture for Integrated Extractive-Oxidative Desulfurization of Fuel Oil: An Optimization Study via Response Surface Methodology

et al. 2020

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Hydrodesulfurization (HDS) has been commercially employed for the production of ultra-low sulfur fuel oil. However, HDS is unable to remove sterically hindered sulfur-containing compounds such as dibenzothiophene (DBT) and benzothiophene (BT). An alternative way to remove sulfur is via extractive desulfurization system (EDS) using deep eutectic solvents (DES) as sustainable extractant. In this work, liquid polymer DES was synthesized using tetrabutylammonium chloride (TBAC) and poly(ethylene glycol) 400 (PEG) with different molar ratios. Response surface methodology (RSM) was applied to study the effect of independent variables toward extraction efficiency (EE). Three significant operating parameters, temperature (25–70 °C), DES molar ratio (1–3), and DES volume ratio (0.2–2.0), were varied to study the EE of sulfur from model oil. A quadratic model was selected based on the fit summary test, revealing that the extraction efficiency was greatly influenced by the amount of DES used, followed by the extraction temperature and PEG ratio. Although molar ratio of DES was less sensitive towards EDS performance, the EE was much higher at lower PEG ratio. For the realization of an energy-efficient EDS system, optimization of EDS parameters and EE was carried out via a desirability tool. At 25 °C, 1:1 molar ratio of TBAC to PEG, and DES-to-model-oil-volume ratio of 1, removal of DBT reached as high as 79.01%. The present findings could provide valuable insight into the development of practicable EDS technology as a substitute to previous HDS process.

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Section: Effect Of Des Volume Ratiosupporting

confidence: 69%

“…They concluded that the stirring speed was the most sensitive factor in EE. Meanwhile, Almashjary et al reported an EE of 64.9% at optimized conditions using ChCl:propionic acid as EDS extractant [37]. Likewise, many parameters have been studied to optimize the EDS conditions.…”

Section: Introductionmentioning

confidence: 99%

Liquid Polymer Eutectic Mixture for Integrated Extractive-Oxidative Desulfurization of Fuel Oil: An Optimization Study via Response Surface Methodology

et al. 2020

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“…For example, ChCl/EG (1:3.5) exhibited higher extraction efficiency (70.9%) of pyridine compared to ChCl/EG (1:2) and ChCl/EG (1:3) [ 129 ]. Almashjary et al [ 130 ] found that an increase in acid content in the DES increases the extraction efficiency of sulfur content. For instance, ChCl/PA exhibited higher extraction efficiency (~65%) of dibenzothiophene at 1:3 than at a 1:2 molar ratio in a single extraction stage.…”

Section: Desulfurization and Denitrification Of Fuelsmentioning

confidence: 99%

Utilization of Deep Eutectic Solvents to Reduce the Release of Hazardous Gases to the Atmosphere: A Critical Review

2020

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The release of certain gases to the atmosphere is controlled in many countries owing to their negative impact on the environment and human health. These gases include carbon dioxide (CO2), sulfur oxides (SOx), nitrogen oxides (NOx), hydrogen sulfide (H2S) and ammonia (NH3). Considering the major contribution of greenhouse gases to global warming and climate change, mitigation of these gases is one of the world’s primary challenges. Nevertheless, the commercial processes used to capture these gases suffer from several drawbacks, including the use of volatile solvents, generation of hazardous byproducts, and high-energy demand. Research in green chemistry has resulted in the synthesis of potentially green solvents that are non-toxic, efficient, and environmentally friendly. Deep eutectic solvents (DESs) are novel solvents that upon wise choice of their constituents can be green and tunable with high biocompatibility, high degradability, and low cost. Consequently, the capture of toxic gases by DESs is promising and environmentally friendly and has attracted much attention during the last decade. Here, we review recent results on capture of these gases using different types of DESs. The effect of different parameters, such as chemical structure, molar ratio, temperature, and pressure, on capture efficiency is discussed.

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“…Therefore, DESs have become suitable candidates for desulfurization processes. They were not only employed as extractants or reaction medium for desulfurization or photochemical desulfurization, but also as catalyst for extraction and catalytic oxidation desulfurization (ECODS) , .…”

Section: Introductionmentioning

confidence: 99%

“…For example, Li's group synthesized ammonium‐based DESs for extraction desulfurization of model fuels and the desulfurization efficiency of such DESs reached up to 82.83 % at a phase ratio of DES to model oil of 1:1 . Khalid et al optimized extractive desulfurization with choline chloride eutectic solvent, and attained a removal efficiency of 64.9 % at a treat ratio of 1:3 model oil . The amount of those reported DES is large and the efficiency of sulfur removal is low, which may be due to the similarity between the sulfur compounds and diesel fuels.…”

Section: Introductionmentioning

confidence: 99%

Removal of Dibenzothiophene from Diesels by Extraction and Catalytic Oxidation with Acetamide‐Based Deep Eutectic Solvents

Hao

Deng

et al. 2019

Chem Eng & Technol

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A series of acetamide-based deep eutectic solvents (DESs) with different proportions were prepared. Extraction and catalytic oxidation desulfurization (ECODS) of the acetamide-based DESs were investigated and the process was optimized. Such DESs with a molar ratio of acetamide and p-TsOH of 1/3 (C 2 H 5 NO/3p-TsOH) exhibits such a remarkable catalytic activity that the dibenzothiophene (DBT) removal could reach 100 % under optimized conditions. C 2 H 5 NO/3p-TsOH was used for the oxidative desulfurization of actual commercial diesel. The sulfur removal of diesel achieved up to 98 %. C 2 H 5 NO/3p-TsOH could be recycled six times and the desulfurization activity was slightly decreased. Evaluation of the mechanism indicated that oxidative desulfurization (ODS) was realized via dual activation of acetamide-based DESs. A novel and effective way for deep desulfurization of diesel is provided.

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Optimisation of extractive desulfurization using Choline Chloride-based deep eutectic solvents

Cited by 89 publications

References 18 publications

Liquid Polymer Eutectic Mixture for Integrated Extractive-Oxidative Desulfurization of Fuel Oil: An Optimization Study via Response Surface Methodology

Liquid Polymer Eutectic Mixture for Integrated Extractive-Oxidative Desulfurization of Fuel Oil: An Optimization Study via Response Surface Methodology

Utilization of Deep Eutectic Solvents to Reduce the Release of Hazardous Gases to the Atmosphere: A Critical Review

Removal of Dibenzothiophene from Diesels by Extraction and Catalytic Oxidation with Acetamide‐Based Deep Eutectic Solvents

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