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  1. Article ; Online: CO

    Isa, Faezah / Zabiri, Haslinda / Harun, Noorlisa / Shariff, Azmi M

    ACS omega

    2022  Volume 7, Issue 22, Page(s) 18213–18228

    Abstract: Promoted potassium carbonate with glycine has been actively investigated as a chemical solvent for the removal of ... ...

    Abstract Promoted potassium carbonate with glycine has been actively investigated as a chemical solvent for the removal of CO
    Language English
    Publishing date 2022-05-26
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c06254
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  2. Article ; Online: Investigation of physical properties and carbon dioxide solubility in tetramethylammonium bromide and tetraethylammonium bromide ionic liquids solutions.

    Rather, Sami-Ullah / Sulaimon, Aliyu Adebayo / Shariff, Azmi M / Qasim, Ali / Bamufleh, Hisham Saeed / Alhumade, Hesham Abdulhamed / Saeed, Usman / Al-Alayah, Walid

    Chemosphere

    2023  Volume 337, Page(s) 139290

    Abstract: Carbon dioxide is a major greenhouse gas that is responsible for global warming and renders harmful effects on the atmosphere. The unconstrained release of ... ...

    Abstract Carbon dioxide is a major greenhouse gas that is responsible for global warming and renders harmful effects on the atmosphere. The unconstrained release of CO
    MeSH term(s) Animals ; Ionic Liquids ; Carbon Dioxide ; Tetraethylammonium ; Solubility ; Moles
    Chemical Substances Ionic Liquids ; Carbon Dioxide (142M471B3J) ; tetramethylammonium (H0W55235FC) ; Tetraethylammonium (66-40-0) ; triethylammonium bicarbonate (15715-58-9)
    Language English
    Publishing date 2023-06-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.139290
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  3. Article ; Online: Investigation of physical properties and carbon dioxide solubility in tetramethylammonium bromide and tetraethylammonium bromide ionic liquids solutions

    Rather, Sami-ullah / Sulaimon, Aliyu Adebayo / Shariff, Azmi M. / Qāsim ʻAlī Nīshāpūrī / Bamufleh, Hisham Saeed / Alhumade, Hesham Abdulhamed / Saeed, Usman / Al-Alayah, Walid

    Chemosphere. 2023 Oct., v. 337 p.139290-

    2023  

    Abstract: Carbon dioxide is a major greenhouse gas that is responsible for global warming and renders harmful effects on the atmosphere. The unconstrained release of CO₂ into the atmosphere should be prevented and various techniques have been developed in this ... ...

    Abstract Carbon dioxide is a major greenhouse gas that is responsible for global warming and renders harmful effects on the atmosphere. The unconstrained release of CO₂ into the atmosphere should be prevented and various techniques have been developed in this regard to capture CO₂ using different solvents and other compounds. Ionic liquids are a suitable candidate to capture CO₂ due to their better solubility behaviour. In this work, two ionic liquids namely tetramethylammonium bromide (TMAB) and tetraethylammonium bromide (TEAB) are employed experimentally to capture CO₂ and investigate their solubility behaviour. The study is performed at the temperature values of 303 K, 313 K, and 323 K and the pressure values of 5, 10, 15, and 20 bar equivalent to 0.5, 1.0, 1.5, and 2.0 MPa respectively. The concentrations of both ionic liquid solutions are 2.5 wt%, 5.0 wt%, and 10.0 wt%. The solubility results are considered in terms of mol fraction which is the ratio of moles of CO₂ captured per moles of ionic liquid. The density and viscosity values are also determined for both compounds at respective conditions. COSMO-RS is used to generate the sigma profile, sigma surface, and Henry's constant of the ions involved in the study. CO₂ is found to be soluble in both ionic liquids, but TEAB showed better solubility behaviour as compared to TMAB. The solubility of CO₂ is found to be increasing with the increase in pressure while it decreases with the increase in temperature.
    Keywords carbon dioxide ; greenhouse gases ; ionic liquids ; solubility ; temperature ; tetraethylammonium compounds ; tetramethylammonium compounds ; viscosity ; CO2 solubility ; Density ; Tetramethylammonium bromide ; Tetraethylammonium bromide
    Language English
    Dates of publication 2023-10
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.139290
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  4. Article ; Online: Corrigendum to 'Prediction of carbon-dioxide activity coefficient for solubility in ionic liquids using multi-non-linear regression analysis', Chemosphere, 311, (2023), 1-10, 137102.

    Rather, Sami-Ullah / Shariff, Azmi M / Sulaimon, Aliyu Adebayo / Bamufleh, Hisham S / Qasim, Ali / Khan, Muhammad Saad / Alhumade, Hesham / Saeed, Usman / Alalayah, Walid M

    Chemosphere

    2023  Volume 315, Page(s) 137721

    Language English
    Publishing date 2023-01-10
    Publishing country England
    Document type Published Erratum
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.137721
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  5. Article ; Online: Adsorption of CO2 and Methane on Covalent Organic Polymer

    Lee Siew-Pei / Mellon N. / Shariff Azmi M. / Leveque Jean-Marc

    E3S Web of Conferences, Vol 43, p

    2018  Volume 01001

    Abstract: Development of covalent organic polymer (COP) is a potential new class of adsorbent for CO2 separation from natural gas mainly due to their good hydrothermal stability, chemical tuning flexibility and low cost. CO2 and methane adsorption on COP-1 was ... ...

    Abstract Development of covalent organic polymer (COP) is a potential new class of adsorbent for CO2 separation from natural gas mainly due to their good hydrothermal stability, chemical tuning flexibility and low cost. CO2 and methane adsorption on COP-1 was studied under atmospheric condition (101.3 kPa, 298 K). COP-1 was synthesized via catalyst-free polycondensation of cyanuric chloride and piperazine. The properties of COP-1 were characterized using several analytical methods such as Fourier Transform Infra-Red (FTIR), N2 adsorption and desorption measurement and Field Transmission Electron Microscopy in coupled of Energy Dispersive X-ray Spectroscopy (FESEM-EDS). Reversible CO2 adsorption isotherm on COP-1 reflects low heat of adsorption which is beneficial to energy minimization in adsorbent regeneration process. Furthermore, moderate specific surface area COP-1 (88.5 m2/g) shows about nine times CO2 uptake higher than methane. The highly selective adsorption performance provides a promising insight in application of COP adsorbent for CO2 removal in natural gas field.
    Keywords Environmental sciences ; GE1-350
    Language English
    Publishing date 2018-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
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  6. Article: Rate-Based Modeling for Packed Absorption Column of the MEA–CO2–Water System at High-Pressure and High-CO2 Loading Conditions

    Shahid, Muhammad Zubair / Bustam, M Azmi / Halim, Hairul Nazirah Abdul / Maulud, Abdulhalim Shah / Shariff, Azmi M / Suleman, Humbul

    Industrial & engineering chemistry process design and development. 2019 June 05, v. 58, no. 27

    2019  

    Abstract: Pandya proposed the first steady-state rate-based model for the chemical absorption process in a packed column using the aqueous CO2–MEA system. Later several modeling studies are also reported based on Pandya’s approach but limited to low pressure (≈1 ... ...

    Abstract Pandya proposed the first steady-state rate-based model for the chemical absorption process in a packed column using the aqueous CO2–MEA system. Later several modeling studies are also reported based on Pandya’s approach but limited to low pressure (≈1 bar) and low CO2 loadings (<0.5 mol/mol). Recently, the interest in processing CO2-rich natural gas at high-pressure conditions has been increased. Therefore, in this study, the Pandya model is modified to simulate the packed absorption column using an aqueous CO2–MEA system for the high-pressure and high-CO2 loading range. The sequential chemical reactions, along with the respective mass transfer resistances that occur at low (<0.5 mol/mol) and high (>0.5 mol/mol) CO2 loadings, are added. This is achieved by theoretically segmenting the packed column into two sections. This strategy simplifies the computation of subsequent fast and slow reaction regimes that occur over a high-CO2 loading range. The gas–liquid nonideal behavior is described using the Peng–Robinson (EOS) and Kent Eisenberg models. The developed model is effectively validated using the experimental data at low- (≈1.03 bar) and high- (50 bar) pressure conditions over a wide CO2 loading range (≈0–1.0 mol/mol). In a parity plot between measured and simulated CO2 concentration, R2 is found to be 0.99 and 0.97, respectively, for the low- (≈1.03 bar) and high- (50 bar) pressure systems. This indicates that the proposed model can accurately predict the critical design parameters at the high-pressure and high-CO2 loading conditions, with minimum computational intricacy.
    Keywords absorption ; carbon dioxide ; chemical reactions ; mass transfer ; models ; natural gas ; process design
    Language English
    Dates of publication 2019-0605
    Size p. 12235-12246.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1484436-9
    ISSN 1520-5045 ; 0888-5885
    ISSN (online) 1520-5045
    ISSN 0888-5885
    DOI 10.1021/acs.iecr.9b01482
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  7. Article ; Online: Prediction of carbon-dioxide activity coefficient for solubility in ionic liquids using multi-non-linear regression analysis.

    Rather, Sami-Ullah / Shariff, Azmi M / Sulaimon, Aliyu Adebayo / Bamufleh, Hisham S / Qasim, Ali / Saad Khan, Muhammad / Alhumade, Hesham / Saeed, Usman / M Alalayah, Walid

    Chemosphere

    2022  Volume 311, Issue Pt 2, Page(s) 137102

    Abstract: Activity coefficient values offer insight into the intermolecular interactions between the solute and the solvent and the deviation from the ideal behavior. ... ...

    Abstract Activity coefficient values offer insight into the intermolecular interactions between the solute and the solvent and the deviation from the ideal behavior. CO
    Language English
    Publishing date 2022-11-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.137102
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  8. Article ; Online: Physical properties of aqueous solutions of potassium carbonate + glycine as a solvent for carbon dioxide removal

    Shuaib Shaikh Muhammad / Shariff Azmi M. / Bustam Mohd A. / Murshid Ghulam

    Journal of the Serbian Chemical Society, Vol 79, Iss 6, Pp 719-

    2014  Volume 727

    Abstract: The physical properties such as densities, viscosities, and refractive indices of aqueous solutions of potassium carbonate (PC) blended with glycine (Gly) as solvent blends for CO2 capture were measured. The properties were measured at ten different ... ...

    Abstract The physical properties such as densities, viscosities, and refractive indices of aqueous solutions of potassium carbonate (PC) blended with glycine (Gly) as solvent blends for CO2 capture were measured. The properties were measured at ten different temperatures from (298.15 to 343.15) K. The mass fractions (w1 + w2) % of the (PC + Gly) blends were (0.05 + 0.01, 0.10 + 0.02, 0.15 + 0.03, 0.20 + 0.04, 0.25 + 0.05, 0.30 + 0.06, 0.35 + 0.07, and 0.40 + 0.08), respectively. The analysis of experimental results shows that, the densities, viscosities, and refractive indices of the aqueous (PC + Gly) blend increase with increasing the concentration of the potassium carbonate and glycine, and decrease with decreasing the temperature. The experimental data of density, viscosity and refractive index were correlated by a least-squares method as a function of temperature. The predicted data were estimated from coefficients of correlation equations for all measured properties, and reported with standard deviation (SD). The experimental data are in consistent with the predicted data.
    Keywords density ; viscosity ; refractive index ; potassium carbonate ; glycine ; CO2 capture ; Chemistry ; QD1-999
    Subject code 541
    Language English
    Publishing date 2014-01-01T00:00:00Z
    Publisher Serbian Chemical Society
    Document type Article ; Online
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  9. Article ; Online: Photocatalytic degradation of DIPA using bimetallic Cu-Ni/TiO2 photocatalyst under visible light irradiation.

    Riaz, Nadia / Bustam, Mohamad Azmi / Chong, Fai Kait / Man, Zakaria B / Khan, Muhammad Saqib / Shariff, Azmi M

    TheScientificWorldJournal

    2014  Volume 2014, Page(s) 342020

    Abstract: Bimetallic Cu-Ni/TiO2 photocatalysts were synthesized using wet impregnation (WI) method with TiO2 (Degussa-P25) as support and calcined at different temperatures (180, 200, and 300°C) for the photodegradation of DIPA under visible light. The ... ...

    Abstract Bimetallic Cu-Ni/TiO2 photocatalysts were synthesized using wet impregnation (WI) method with TiO2 (Degussa-P25) as support and calcined at different temperatures (180, 200, and 300°C) for the photodegradation of DIPA under visible light. The photocatalysts were characterized using TGA, FESEM, UV-Vis diffuse reflectance spectroscopy, fourier transform infrared spectroscopy (FTIR) and temperature programmed reduction (TPR). The results from the photodegradation experiments revealed that the Cu-Ni/TiO2 photocatalysts exhibited much higher photocatalytic activities compared to bare TiO2. It was found that photocatalyst calcined at 200°C had the highest photocatalyst activities with highest chemical oxygen demand (COD) removal (86.82%). According to the structural and surface analysis, the enhanced photocatalytic activity could be attributed to its strong absorption into the visible region and high metal dispersion.
    MeSH term(s) Catalysis ; Copper/chemistry ; Nickel/chemistry ; Photochemistry/methods ; Quaternary Ammonium Compounds/chemistry ; Titanium/chemistry
    Chemical Substances Quaternary Ammonium Compounds ; titanium dioxide (15FIX9V2JP) ; diisopropylamine dichloroacetate (660-27-5) ; Copper (789U1901C5) ; Nickel (7OV03QG267) ; Titanium (D1JT611TNE)
    Language English
    Publishing date 2014-06-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2075968-X
    ISSN 1537-744X ; 1537-744X
    ISSN (online) 1537-744X
    ISSN 1537-744X
    DOI 10.1155/2014/342020
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