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  1. Article ; Online: A review on development of metal-organic framework-derived bifunctional electrocatalysts for oxygen electrodes in metal-air batteries.

    Javed, Najla / Noor, Tayyaba / Iqbal, Naseem / Naqvi, Salman Raza

    RSC advances

    2023  Volume 13, Issue 2, Page(s) 1137–1161

    Abstract: Worldwide demand for oil, coal, and natural gas has increased recently because of odd weather patterns and economies recovering from the pandemic. By using these fuels at an astonishing rate, their reserves are running low with each passing decade. ... ...

    Abstract Worldwide demand for oil, coal, and natural gas has increased recently because of odd weather patterns and economies recovering from the pandemic. By using these fuels at an astonishing rate, their reserves are running low with each passing decade. Increased reliance on these sources is contributing significantly to both global warming and power shortage problems. It is vital to highlight and focus on using renewable energy sources for power production and storage. This review aims to discuss one of the cutting-edge technologies, metal-air batteries, which are currently being researched for energy storage applications. A battery that employs an external cathode of ambient air and an anode constructed of pure metal in which an electrolyte can be aqueous or aprotic electrolyte is termed as a metal-air battery (MAB). Due to their reportedly higher energy density, MABs are frequently hailed as the electrochemical energy storage of the future for applications like grid storage or electric car energy storage. The demand of the upcoming energy storage technologies can be satisfied by these MABs. The usage of metal-organic frameworks (MOFs) in metal-air batteries as a bi-functional electrocatalyst has been widely studied in the last decade. Metal ions or arrays bound to organic ligands to create one, two, or three-dimensional structures make up the family of molecules known as MOFs. They are a subclass of coordination polymers; metal nodes and organic linkers form different classes of these porous materials. Because of their modular design, they offer excellent synthetic tunability, enabling precise chemical and structural control that is highly desirable in electrode materials of MABs.
    Language English
    Publishing date 2023-01-16
    Publishing country England
    Document type Journal Article ; Review
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d2ra06741b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: An integrated approach for the extraction of lipids from marine macroalgae consortium using RSM optimization and thermo-kinetic analysis.

    AlMohamadi, Hamad / Alamoudi, Majed / Yameen, Muhammad Zubair / Naqvi, Salman Raza

    Chemosphere

    2023  Volume 338, Page(s) 139623

    Abstract: This work presents an integrated approach for the extraction of lipids from marine macroalgae using RSM optimization and thermo-kinetic analysis. The lipids were extracted from marine macroalgal biomass using a Soxhlet extractor. The Soxhlet extraction ... ...

    Abstract This work presents an integrated approach for the extraction of lipids from marine macroalgae using RSM optimization and thermo-kinetic analysis. The lipids were extracted from marine macroalgal biomass using a Soxhlet extractor. The Soxhlet extraction parameters, including temperature (60-80 °C), solvent-to-algae ratio (3:1-7:1), algal particle size (0.05-0.25 mm), and extraction time (60-180 min), were optimized using RSM to achieve the maximum possible lipid extraction yield from marine macroalgae. The highest lipid extraction yield of 12.76% was obtained using the optimized conditions, which included an extraction temperature of 72 °C, a solvent-to-algae ratio of 5:1, an algal particle size of 0.16 mm, and an extraction time of 134 min. The kinetic analysis revealed an activation energy of 52.79 kJ mol-1 for the Soxhlet extraction process. The thermodynamic analysis of the Soxhlet extraction process demonstrated the following results: ΔH = 49.98 kJ mol-1, ΔS = -128.24 J K-1 mol-1, and ΔG = 93.98 kJ mol-1. The GC-MS analysis confirmed that the extracted algal lipids exhibited a composition of 14.20% palmitic acid, 4.89% stearic acid, and 76.97% oleic acid. The physiochemical analysis ensured that the extracted algal lipids possess excellent qualities, making them desirable for sustainable biofuel production.
    MeSH term(s) Kinetics ; Seaweed ; Temperature ; Thermodynamics ; Solvents ; Lipids/analysis
    Chemical Substances Solvents ; Lipids
    Language English
    Publishing date 2023-07-22
    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.2023.139623
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  3. Article ; Online: An integrated approach for the extraction of lipids from marine macroalgae consortium using RSM optimization and thermo-kinetic analysis

    AlMohamadi, Hamad / Alamoudi, Majed / Yameen, Muhammad Zubair / Naqvi, Salman Raza

    Chemosphere. 2023 Oct., v. 338 p.139623-

    2023  

    Abstract: This work presents an integrated approach for the extraction of lipids from marine macroalgae using RSM optimization and thermo-kinetic analysis. The lipids were extracted from marine macroalgal biomass using a Soxhlet extractor. The Soxhlet extraction ... ...

    Abstract This work presents an integrated approach for the extraction of lipids from marine macroalgae using RSM optimization and thermo-kinetic analysis. The lipids were extracted from marine macroalgal biomass using a Soxhlet extractor. The Soxhlet extraction parameters, including temperature (60–80 °C), solvent-to-algae ratio (3:1–7:1), algal particle size (0.05–0.25 mm), and extraction time (60–180 min), were optimized using RSM to achieve the maximum possible lipid extraction yield from marine macroalgae. The highest lipid extraction yield of 12.76% was obtained using the optimized conditions, which included an extraction temperature of 72 °C, a solvent-to-algae ratio of 5:1, an algal particle size of 0.16 mm, and an extraction time of 134 min. The kinetic analysis revealed an activation energy of 52.79 kJ mol−1 for the Soxhlet extraction process. The thermodynamic analysis of the Soxhlet extraction process demonstrated the following results: ΔH = 49.98 kJ mol−1, ΔS = −128.24 J K−1 mol−1, and ΔG = 93.98 kJ mol−1. The GC-MS analysis confirmed that the extracted algal lipids exhibited a composition of 14.20% palmitic acid, 4.89% stearic acid, and 76.97% oleic acid. The physiochemical analysis ensured that the extracted algal lipids possess excellent qualities, making them desirable for sustainable biofuel production.
    Keywords activation energy ; biomass ; fuel production ; kinetics ; macroalgae ; oleic acid ; palmitic acid ; particle size ; solid phase extraction ; stearic acid ; temperature ; Marine macroalgae ; Algal lipids ; Soxhlet extraction ; RSM optimization ; Thermodynamics
    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.2023.139623
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  4. Article ; Online: Life cycle assessment of a biomass based chemical looping combustion.

    Mercado, John Patrick / Ubando, Aristotle T / Gonzaga, Jeremias A / Naqvi, Salman Raza

    Environmental research

    2022  Volume 217, Page(s) 114876

    Abstract: Chemical looping combustion (CLC) is a promising technology that generates energy while inherently separating carbon dioxide from air using oxygen carriers. This allows for an efficient and cost-effective means of carbon capture and storage. Current CLC ... ...

    Abstract Chemical looping combustion (CLC) is a promising technology that generates energy while inherently separating carbon dioxide from air using oxygen carriers. This allows for an efficient and cost-effective means of carbon capture and storage. Current CLC systems use coal with metal oxides for combustion in the fuel reactor, thus, resulting in some environmental impacts. Recent life cycle assessment (LCA) of CLC studies have indicated the environmental impacts of conventional coal-based CLC, especially on the global warming potential. To mitigate these environmental impacts, this study proposes the use of a biomass-based CLC and evaluates its impacts using LCA. A case study in the Philippines is adopted where rice husks are used as biomass feedstock. A kilowatt-hour of electricity generated from the CLC plant is utilized as the functional unit. A relative comparison of environmental impacts was considered between the coal-based power plant, the coal-based CLC plant, and the biomass-based CLC plant. The single score results have shown that the biomass-based CLC has the least environmental impacts relative to the coal-based power plant and the coal-based CLC plant. However, it is noted that water consumption is the main drawback of utilizing rice husks as CLC biomass feedstock. The majority of the environmental impacts of the coal-based CLC and the coal-based power plant were derived from upstream processes such as coal mining and processing. With the use of rice husks as CLC biomass feedstock, net negative emissions were achieved.
    MeSH term(s) Animals ; Biomass ; Coal ; Oxides ; Carbon Dioxide ; Life Cycle Stages
    Chemical Substances Coal ; Oxides ; Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2022-11-23
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2022.114876
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  5. Article ; Online: Algal-derived biochar as an efficient adsorbent for removal of Cr (VI) in textile industry wastewater: Non-linear isotherm, kinetics and ANN studies.

    Khan, Abdul Ahad / Naqvi, Salman Raza / Ali, Imtiaz / Arshad, Muazzam / AlMohamadi, Hamad / Sikandar, Umair

    Chemosphere

    2023  Volume 316, Page(s) 137826

    Abstract: Textile industries release effluent that contains the vast majority of heavy metals in which Cr (VI) is a toxic carcinogenic element that causes an environmental problem. The aim of the work is to synthesize algae-derived biochar derived from algae using ...

    Abstract Textile industries release effluent that contains the vast majority of heavy metals in which Cr (VI) is a toxic carcinogenic element that causes an environmental problem. The aim of the work is to synthesize algae-derived biochar derived from algae using slow pyrolysis at an operating temperature of 500 °C, a heating rate of 10 °C/min and a residence time of 60 min and to use it as an adsorbent to remove Cr (VI). The batch experiment was carried out using different concentrations of Cr (VI) (1, 10, 25, 50, 100, 125, 150 and 200 ppm) at different intervals of time (2.5, 5, 10, 15, 30, 60, 120 and 240 min). The maximum removal percentage of Cr (VI) is 97.88% for the metal concentration of 1 ppm exhibiting non-linear adsorption isotherm (Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin models) and kinetic models (pseudo-first order, pseudo-second order, nth order, and intra-particle diffusion) were analyzed using a solver add-in of Microsoft Excel. According to the results, the Langmuir isotherm model (R
    MeSH term(s) Chromium/analysis ; Wastewater ; Textile Industry ; Water Pollutants, Chemical ; Hydrogen-Ion Concentration ; Charcoal ; Kinetics ; Adsorption
    Chemical Substances Chromium (0R0008Q3JB) ; biochar ; Wastewater ; Water Pollutants, Chemical ; Charcoal (16291-96-6)
    Language English
    Publishing date 2023-01-11
    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.2023.137826
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  6. Article ; Online: Development of high-capacity surface-engineered MXene composite for heavy metal Cr (VI) removal from industrial wastewater.

    Asif, Umair Ali / Mahmood, Khalid / Naqvi, Salman Raza / Mehran, Muhammad Taqi / Noor, Tayyaba

    Chemosphere

    2023  Volume 326, Page(s) 138448

    Abstract: The substantial quantity of Cr(VI) contaminants in the aqueous atmosphere is a major environmental fear that cannot be overlooked. For the first time, MXene and chitosan-coated polyurethane foam have been employed for wastewater treatment, including ... ...

    Abstract The substantial quantity of Cr(VI) contaminants in the aqueous atmosphere is a major environmental fear that cannot be overlooked. For the first time, MXene and chitosan-coated polyurethane foam have been employed for wastewater treatment, including heavy metal ions (Cr (VI)) through a fixed-bed column study. It is also the most inexpensive, lightweight, and globally friendly material tested. The Mxene and chitosan-coated polyurethane foam hybrid materials were thoroughly investigated using FTIR (Fourier transform infrared), SEM (scanning electron microscope), XPS (X-ray photoelectron spectroscopy) and XRD (X-ray diffraction). The presence of the rough surface and the pore creation in the Mxene- MX
    MeSH term(s) Wastewater ; Chitosan/chemistry ; Water Pollutants, Chemical/analysis ; Chromium/chemistry ; Water/chemistry ; Ions ; Adsorption ; Hydrogen-Ion Concentration ; Kinetics ; Spectroscopy, Fourier Transform Infrared
    Chemical Substances chromium hexavalent ion (18540-29-9) ; polyurethane foam (9009-54-5) ; Wastewater ; Chitosan (9012-76-4) ; MXene ; Water Pollutants, Chemical ; Chromium (0R0008Q3JB) ; Water (059QF0KO0R) ; Ions
    Language English
    Publishing date 2023-03-20
    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.2023.138448
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Assessment of thermokinetic behaviour of tannery sludge in slow pyrolysis process through artificial neural network

    Khan, Arslan / Ali, Imtiaz / Naqvi, Salman Raza / AlMohamadi, Hamad / Shahbaz, Muhammad / Ali, Arshid Mahmood / Shahzad, Khurram

    Chemosphere. 2023 Oct., v. 337 p.139226-

    2023  

    Abstract: In the leather industry, tannery sludge is produced in large volume. This study investigated the thermal degradation behavior of tannery sludge using thermogravimetric analysis (TGA). The experiments were carried out in an inert atmosphere using nitrogen ...

    Abstract In the leather industry, tannery sludge is produced in large volume. This study investigated the thermal degradation behavior of tannery sludge using thermogravimetric analysis (TGA). The experiments were carried out in an inert atmosphere using nitrogen gas at varied heating rates of 5, 10, 20, and 40 °C/min in the temperature range of 30–900 °C. For the kinetic parameters calculation, three different models, Friedman, Kissinger-Akahira-Sunose (KAS) and the Ozawa-Flynn-Wall (OFW), were employed. The average activation energy (Eₐ) obtained from Friedman, KAS, and the OFW methods were 130.9 kJ mol⁻¹, 143.14 kJ mol⁻¹, and 147.19 kJ mol⁻¹ respectively. Along with that, experiment of pyrolysis was accomplished in fixed bed reactor (FBR) at temperature of 400 °C. Biochar produced from FBR had a yield of about 71%. The analysis of gas chromatography-mass spectroscopy shows the different chemical compounds present in the bio-oil containing hydrocarbons (alkanes and alkenes), oxygen containing compounds (alcohols, aldehyde, ketones, esters carboxylic acids and the esters) and the nitrogen containing compounds. The kinetic assessment was complemented by distributed activation energy model (DAEM). In the pyrolysis of tannery sludge six pseudo-components were found to be involved. Furthermore, artificial neural network (ANN) was used to predict the activation energy from conversion, temperature, and the heating rate data. MLP-3-11-1 (Multilayer Perceptrons) described well the conversion behavior of tannery sludge pyrolysis.
    Keywords activation energy ; aldehydes ; alkenes ; biochar ; biofuels ; gas chromatography ; leather industry ; neural networks ; nitrogen ; oxygen ; pyrolysis ; spectroscopy ; tannery waste ; temperature ; thermogravimetry ; Tannery sludge pyrolysis ; Isoconversional ; Thermodynamics ; DAEM ; ANN
    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.2023.139226
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  8. Article: Monitoring lipids profile, CO2 fixation, and water recyclability for the economic viability of microalgae Chlorella vulgaris cultivation at different initial nitrogen

    Farooq, Wasif / Naqvi, Salman Raza / Sajid, Muhammad / Shrivastav, Anupama / Kumar, Kanhaiya

    Journal of biotechnology. 2022 Feb. 10, v. 345

    2022  

    Abstract: The economic viability of microalgae as a bioenergy source depends on many factors. High CO₂ fixing rate, improved lipids yield, and minimum water footprint are few key parameters. This study investigates the effect of four initial nitrogen ... ...

    Abstract The economic viability of microalgae as a bioenergy source depends on many factors. High CO₂ fixing rate, improved lipids yield, and minimum water footprint are few key parameters. This study investigates the effect of four initial nitrogen concentrations (1-, 2-, 6- and 10-mM as nitrate) on lipids yield, their classification and composition, CO₂ fixation rate, and water quality for further reuse after first cultivation. The initial 6 mM nitrate was found optimum for the growth and overall lipid productivity of Chlorella vulgaris. The maximum quantum efficiency (as Fv/Fm ratio) for algae decreases along with the cell growth profile and depletion of the initial nitrate concentration. CO₂ fixation rate increased initially and peaked during exponential growth and then declined for the rest of the cultivation period. A higher CO₂ fixation rate was recorded at 6 mM, and an overall fixation rate of CO₂ was high at 6 mM. A higher total organic carbon (TOC) is produced in recycled water at a low nitrogen concentration of 1 and 2 mM. TOC changes during the cultivation period and with each reuse of water. Water was recycled twice successfully, while growth was inhibited during the 3rd cycle. Based on all these investigations, 6 mM of initial nitrogen was found optimal at given growth conditions.
    Keywords Chlorella vulgaris ; bioenergy ; biotechnology ; carbon dioxide ; carbon dioxide fixation ; cell growth ; economic sustainability ; lipids ; microalgae ; nitrates ; nitrogen ; nitrogen content ; recycled water ; total organic carbon ; water footprint ; water quality ; water reuse
    Language English
    Dates of publication 2022-0210
    Size p. 30-39.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 843647-2
    ISSN 1873-4863 ; 0168-1656 ; 1389-0352
    ISSN (online) 1873-4863
    ISSN 0168-1656 ; 1389-0352
    DOI 10.1016/j.jbiotec.2021.12.014
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  9. Article: Comparative hydrodynamics study of fluidized bed gasifier incorporating static and rotating air distributor plates: A CFD approach

    Raza, Naveed / Ahsan, Muhammad / Mehran, Muhammad Taqi / Naqvi, Salman Raza / Ahmad, Iftikhar

    Powder technology. 2022 June, v. 405

    2022  

    Abstract: This paper studies hydrodynamics of bubbling fluidized bed gasifier using static and rotating perforated air distributor plates. Pressure drop across the bed is calculated numerically using a static distributor plate to validate the model results with ... ...

    Abstract This paper studies hydrodynamics of bubbling fluidized bed gasifier using static and rotating perforated air distributor plates. Pressure drop across the bed is calculated numerically using a static distributor plate to validate the model results with available experimental data. CFD results are good enough within the acceptable range of 10% difference. Dynamic mesh methodology coupled with the siding mesh technique of ANSYS FLUENT is incorporated to rotate distributor plates for specified rotational velocity using a user-defined function (UDF) hooked to the solver. Hydrodynamics study of fluidized bed with varying operational parameters using rotating plate distributor is carried out extensively. It is revealed that the impact of tangential and radial velocities on the fluidized bed due to rotation of plate is highest for lower superficial velocities, shallow initial depth, and the maximum rotational velocity of the distributor plate. The tangential and radial velocities variations with column height up to 3Uₘf showed a similar trend that changed significantly for higher superficial velocities (4Uₘf, 5Uₘf), resulting in more chaotic solids. The comparative evaluation of static and rotating distributor plates results shows an appreciable difference. The pressure drop across the bed is increased about 6–7% and minimum fluidization velocity is decreased upto 10% when compared to static plate distributor. Moreover, bed height rise is on a higher side for static plate distributors due to the dominant axial component of air velocity compared to the rotating plate distributor. It is also revealed that the pressure fluctuations within the fluidized bed are significantly reduced (88%) when using a rotating distributor plate compared with static plate distributors.
    Keywords air ; fluidized beds ; hydrodynamics ; model validation ; technology
    Language English
    Dates of publication 2022-06
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 0032-5910
    DOI 10.1016/j.powtec.2022.117500
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  10. Article ; Online: Monitoring lipids profile, CO

    Farooq, Wasif / Naqvi, Salman Raza / Sajid, Muhammad / Shrivastav, Anupama / Kumar, Kanhaiya

    Journal of biotechnology

    2022  Volume 345, Page(s) 30–39

    Abstract: The economic viability of microalgae as a bioenergy source depends on many factors. High ... ...

    Abstract The economic viability of microalgae as a bioenergy source depends on many factors. High CO
    MeSH term(s) Biofuels ; Biomass ; Carbon Dioxide ; Chlorella vulgaris ; Lipids ; Microalgae ; Nitrogen/analysis ; Waste Water
    Chemical Substances Biofuels ; Lipids ; Waste Water ; Carbon Dioxide (142M471B3J) ; Nitrogen (N762921K75)
    Language English
    Publishing date 2022-01-04
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 843647-2
    ISSN 1873-4863 ; 0168-1656 ; 1389-0352
    ISSN (online) 1873-4863
    ISSN 0168-1656 ; 1389-0352
    DOI 10.1016/j.jbiotec.2021.12.014
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