4 results on '"Sarwono Mulyono"'
Search Results
2. Investigating the solubility of chlorophenols in hydrophobic ionic liquids
- Author
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Inas M. AlNashef, R. Sulaiman, Shadi W. Hasan, Sarwono Mulyono, and Mohamed K. Hadj-Kali
- Subjects
Chemistry ,Electrolyte ,Biodegradation ,Atomic and Molecular Physics, and Optics ,Pentachlorophenol ,chemistry.chemical_compound ,Ionic liquid ,Non-random two-liquid model ,Phenol ,Organic chemistry ,General Materials Science ,Water treatment ,Physical and Theoretical Chemistry ,Solubility - Abstract
Chlorophenols (CPs) are synthetic chemicals that are generated and used widely by different industries such as textile, pharmaceutical, metallurgic, oil, and pulp and paper manufacturing. Except water, most of the solvents used in these industries are volatile and toxic. Therefore, there is an imminent need for replacing these solvents by solvents that have less negative impact on the environment. In addition, CPs are considered as hazardous pollutants due to their resistance to biodegradation and persistence in the environment. Their toxic effects are severe including DNA damage, endocrine disruption, cytotoxicity, mutagenicity, and carcinogenicity. Hence, the water contaminated by CPs must be treated before being released to the environment. Ionic liquids (ILs) are molten salts that are liquid below 100 °C, which have been used as solvents for many processes including liquid-liquid extraction and as electrolytes in electrochemical devices. ILs are characterized by negligible vapor pressure and non-flammability. These compounds are liquid over a wide range of temperatures; possess high thermal and chemical stability. ILs are being used as media for many reactions to reduce the negative impact of traditional solvents on the environment. In addition, using ILs as green solvents in water treatment has become a research hotspot. Solubility data of CPs in ILs is important for assessing the potential use of ILs as reaction media and in water treatment, but relevant data for ILs are scarce. To our best knowledge, no solubility data of chlorophenols in ILs were reported in the literature. Thus, in this study, the solubility of 3-chlorophenol (3-CP), 2,5-dichlorophenol (DCP), 2,4,6-trichlorophenol (TCP), and pentachlorophenol (PCP) in six hydrophobic bis(trifluoromethylsulfonyl)imide based ILs at 25 °C, 35 °C and 45 °C was investigated. It was found that the solubility of 3-CP in all studied ILs at 25 °C was greater than 70 wt%, thus the solubility measurements of 3-chlorophenol in the studied IL were stopped at 70 wt% and further measurement was not conducted. The solubility of other CPs in all studied ILs decreased with increasing the number of chlorine atoms in the CP and increased with the increase in temperature, but the degree of increase depended on the structure of both the IL and chlorinated phenol. In general, it was found that the tested chlorophenols have substantial solubility in pyridinium and imidazolium-based ILs. In addition, the non-random two-liquid model (NRTL) and Conductor-like Screening Model for Real Solvents (COSMO-RS) models were applied to predict the solubility of chlorophenols in all ILs used in this study. There was a good quantitative and qualitative agreement between experimental and calculated solubility data in most of the cases.
- Published
- 2019
- Full Text
- View/download PDF
3. Liquid-liquid equilibria data for the separation of ethylbenzene/styrene mixtures using ammonium-based deep eutectic solvents
- Author
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Irfan Wazeer, Mohd Ali Hashim, Omar Alqusair, Hanee F. Hizaddin, Mohamed K. Hadj-Kali, Sarwono Mulyono, and Emad Ali
- Subjects
Extraction (chemistry) ,Analytical chemistry ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Ethylbenzene ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Styrene ,chemistry.chemical_compound ,Boiling point ,020401 chemical engineering ,chemistry ,Ionic liquid ,Non-random two-liquid model ,General Materials Science ,0204 chemical engineering ,Physical and Theoretical Chemistry ,Ternary operation ,Eutectic system - Abstract
Separation of styrene from ethylbenzene is challenging because of their close boiling points and similar chemical characteristics. In this study, we utilized three ammonium-based deep eutectic solvents (DESs) with glycols as hydrogen bond donors to separate styrene from ethylbenzene via liquid-liquid extraction at room temperature and atmospheric pressure, with styrene concentration in the feed mixture ranging from (10 to 80) wt%. Consistency of the experimental data was ascertained by Othmer-Tobias and Hand correlations, and the NRTL binary interaction parameters were also validated for thermodynamic consistency. Distribution ratios of styrene were found to be comparable to that obtained using ionic liquids, although the selectivity values were much lower. The ternary liquid-liquid equilibria for the systems {ethylbenzene (1) + styrene (2) + DES (3)} were correlated with the NRTL model and predicted using the COSMO-RS approach. The average RMSD from the experimental data for NRTL correlation is 1.41% and for COSMO-RS prediction is 4.74%.
- Published
- 2019
- Full Text
- View/download PDF
4. Efficient removal of benzene from cyclohexane-benzene mixtures using deep eutectic solvents – COSMO-RS screening and experimental validation
- Author
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Zulhaziman Salleh, Lahssen El-blidi, Sarwono Mulyono, Mohd Ali Hashim, Irfan Wazeer, and Mohamed K. Hadj-Kali
- Subjects
Activity coefficient ,Chromatography ,Cyclohexane ,Extraction (chemistry) ,Analytical chemistry ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,chemistry.chemical_compound ,COSMO-RS ,020401 chemical engineering ,chemistry ,Liquid–liquid extraction ,Non-random two-liquid model ,General Materials Science ,0204 chemical engineering ,Physical and Theoretical Chemistry ,0210 nano-technology ,Benzene ,Eutectic system - Abstract
The separation of benzene and cyclohexane is considered one of the most challenging processes in the petrochemical industry. For this study, 40 deep eutectic solvents (DESs) were screened by using the COSMO-RS model. The screening was achieved based on a comparison of selectivity, capacity, and the performance index, all derived from the activity coefficient at infinite dilution. In addition, the sigma σ-profile and σ-potential of each component were used to analyse the interactions between the different species during the extraction process. After screening, five DESs were selected for experimental validation. The liquid–liquid extraction process was conducted, and the ternary diagrams were plotted for the selected DESs at 25 °C under atmospheric pressure. The NRTL model was successfully employed to correlate the experimental tie lines. The results revealed that COSMO-RS was a useful tool for screening potential DESs qualitatively. In addition, observations revealed strong agreement between NRTL and the experiment results, with a root mean square deviation of less than unity for all systems. The findings showed that the selected DESs are feasible for use as extracting solvents for this separation, whereby in all systems no trace of DES was found in the cyclohexane layer.
- Published
- 2017
- Full Text
- View/download PDF
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