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Khan A, Ali I, Naqvi SR, AlMohamadi H, Shahbaz M, Ali AM, Shahzad K. Assessment of thermokinetic behaviour of tannery sludge in slow pyrolysis process through artificial neural network. CHEMOSPHERE 2023:139226. [PMID: 37379972 DOI: 10.1016/j.chemosphere.2023.139226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/26/2023] [Accepted: 06/13/2023] [Indexed: 06/30/2023]
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 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 method, KAS, and the OFW 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 at temperature of 400 °C. Biochar produced has 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 frequency distribution of 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 described well the conversion behavior of tannery sludge pyrolysis.
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Affiliation(s)
- Arslan Khan
- Laboratory of Alternative Fuels & Sustainability, School of Chemical & Materials Engineering, National University of Sciences & Technology, 44000, H-12, Islamabad, Pakistan.
| | - Imtiaz Ali
- Department of Chemical and Materials Engineering, King Abdulaziz University, Rabigh, 21911, Saudi Arabia
| | - Salman Raza Naqvi
- Laboratory of Alternative Fuels & Sustainability, School of Chemical & Materials Engineering, National University of Sciences & Technology, 44000, H-12, Islamabad, Pakistan
| | - Hamad AlMohamadi
- Department of Chemical Engineering, Islamic University of Madinah, Madinah, Saudi Arabia
| | - Muhammad Shahbaz
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University (HBKU), Qatar Foundation, P.O. Box 5825, Doha, Qatar
| | - Arshid Mahmood Ali
- Department of Chemical & Materials Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Khurram Shahzad
- Center of Excellence in Environmental Studies (CEES), King Abdulaziz University, Jeddah, Saudi Arabia
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Waste cooking oil as a promising source for bio lubricants- A review. J INDIAN CHEM SOC 2023. [DOI: 10.1016/j.jics.2022.100820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Sabi GJ, Gama RS, Fernandez-Lafuente R, Cancino-Bernardi J, Mendes AA. Decyl esters production from soybean-based oils catalyzed by lipase immobilized on differently functionalized rice husk silica and their characterization as potential biolubricants. Enzyme Microb Technol 2022; 157:110019. [PMID: 35219176 DOI: 10.1016/j.enzmictec.2022.110019] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/14/2022] [Accepted: 02/17/2022] [Indexed: 12/16/2022]
Abstract
This study aimed the enzymatic decyl esters production by hydroesterification, a two-step process consisting of hydrolysis of refined soybean (RSBO) or used soybean cooking (USCO) oils to produce free fatty acids (FFA) and further esterification of purified FFA. Using free lipase from Candida rugosa (CRL), about 98% hydrolyses for both oils have been observed after 180 min of reaction using a CRL loading of 50 U g-1 of reaction mixture, 40 °C, and a mechanical stirring of 1500 rpm. FFA esterification with decanol in solvent-free systems was performed using lipase from Thermomyces lanuginosus (TLL) immobilized by physical adsorption on silica particles extracted from rice husk, an agricultural waste. For such purpose, non-functionalized (SiO2) or functionalized rice husk silica bearing octyl (Octyl-SiO2) or phenyl (Phe-SiO2) groups have been used as immobilization supports. Protein amounts between 22 and 28 mg g-1 of support were observed. When used in the esterification, they enabled a FFA conversion of 81.3-87.6% after 90-300 min of reaction. Lipozyme TL IM, a commercial immobilized TLL, exhibited similar performance compared to TLL-Octyl-SiO2 (FFA conversion ≈90% after 90-120 min of reaction). However, high operational stability after fifteen successive esterification batches was observed only for TLL immobilized on Octyl-SiO2 (activity retention of ≈90% using both FFA sources). The produced decyl esters presented good characteristics as potential biolubricants according to standard methods (ASTM) and thermal analysis.
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Affiliation(s)
- Guilherme J Sabi
- Institute of Chemistry, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil
| | - Rafaela S Gama
- Institute of Chemistry, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil
| | - Roberto Fernandez-Lafuente
- Departamento de Biocatálisis, ICP-CSIC, Campus UAM-CSIC, 28049 Madrid, Spain; Center of Excellence in Bionanoscience Research, External Scientific Advisory Academic, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
| | - Juliana Cancino-Bernardi
- Institute of Chemistry, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil; Nanomedicine and Nanotoxicology Group, Physics Institute of São Carlos, University of São Paulo, 13566-590 São Carlos, SP, Brazil
| | - Adriano A Mendes
- Institute of Chemistry, Federal University of Alfenas, 37130-001 Alfenas, MG, Brazil.
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Umar Y, Aboelazayem O, Gadalla MA, Saha B. Enhanced biodiesel production with improved oxidation stability by water addition to supercritical methanolysis. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yusuf Umar
- School of Engineering, London South Bank University, 103 Borough Road London United Kingdom
| | - Omar Aboelazayem
- School of Chemical and Process Engineering University of Leeds Leeds United Kingdom
| | - Mamdouh A. Gadalla
- Department of Chemical Engineering Port Said University, Port Fouad City Port Said Egypt
- Department of Chemical Engineering The British University in Egypt, El Sherouk City Cairo Egypt
| | - Basudeb Saha
- Engineering Department Lancaster University Lancaster United Kingdom
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The Lord of the Chemical Rings: Catalytic Synthesis of Important Industrial Epoxide Compounds. Catalysts 2021. [DOI: 10.3390/catal11070765] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The epoxidized group, also known as the oxirane group, can be considered as one of the most crucial rings in chemistry. Due to the high ring strain and the polarization of the C–O bond in this three-membered ring, several reactions can be carried out. One can see such a functional group as a crucial intermediate in fuels, polymers, materials, fine chemistry, etc. Literature covering the topic of epoxidation, including the catalytic aspect, is vast. No review articles have been written on the catalytic synthesis of short size, intermediate and macro-molecules to the best of our knowledge. To fill this gap, this manuscript reviews the main catalytic findings for the production of ethylene and propylene oxides, epichlorohydrin and epoxidized vegetable oil. We have selected these three epoxidized molecules because they are the most studied and produced. The following catalytic systems will be considered: homogeneous, heterogeneous and enzymatic catalysis.
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Orjuela A, Clark J. Green chemicals from used cooking oils: Trends, challenges, and opportunities. CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY 2020; 26:100369. [PMID: 32835134 PMCID: PMC7276142 DOI: 10.1016/j.cogsc.2020.100369] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 05/28/2020] [Indexed: 06/11/2023]
Abstract
Food waste reduction is fundamental for sustainable development and pursuing this goal, recycling and the valorization of used cooking oil (UCO) can play a major contribution. Although it has been traditionally used for biofuel production, the oleochemical potential of UCOs is vast. UCOs can be used as feedstock for a large variety of value-added green chemicals including plasticizers, binders, epoxides, surfactants, lubricants, polymers, biomaterials, and different building blocks. Thus, UCO transformation into functional chemicals can bring long-term stability to the supply chain, avoiding the current dependence on commodity products. In this regard, this work describes some of the potential benefits of using UCOs as feedstock in oleochemical biorefineries. In addition, some of the most recent investigations on the valorization of UCOs other than biofuel are presented. Finally, major challenges and future directions are discussed.
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Affiliation(s)
- Alvaro Orjuela
- Department of Chemical and Environmental Engineering, Universidad Nacional de Colombia, 111321, Bogotá D.C., Colombia
| | - James Clark
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York, Heslington, York, Y010 5DD, UK
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Panerati J, Schnellmann MA, Patience C, Beltrame G, Patience GS. Experimental methods in chemical engineering: Artificial neural networks–ANNs. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23507] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jacopo Panerati
- Department of Computer and Software EngineeringPolytechnique Montréal C.P. 6079, Succ. CV, Montréal, QC, H3C 3A7 Canada
| | - Matthias A. Schnellmann
- Department of EngineeringUniversity of Cambridge Trumpington Street, Cambridge, CB2 1PZ United Kingdom
| | - Christian Patience
- Department of Mechanical EngineeringMcGill University 845 Sherbrooke Street West, Montréal, QC, H3A 0G4 Canada
| | - Giovanni Beltrame
- Department of Computer and Software EngineeringPolytechnique Montréal C.P. 6079, Succ. CV, Montréal, QC, H3C 3A7 Canada
| | - Gregory S. Patience
- Department of Chemical EngineeringPolytechnique Montréal C.P. 6079, Succ. CV Montréal, QC, H3C 3A7 Canada
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Rincón LA, Cadavid JG, Orjuela A. Used cooking oils as potential oleochemical feedstock for urban biorefineries - Study case in Bogota, Colombia. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 88:200-210. [PMID: 31079632 DOI: 10.1016/j.wasman.2019.03.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 01/31/2019] [Accepted: 03/20/2019] [Indexed: 06/09/2023]
Abstract
This work is focused on assessing the potential for the exploitation of used cooking oils (UCOs) as oleochemical feedstock for urban biorefineries. The study case was developed for the city of Bogotá, Colombia. Initially, and according to data from major fats and oils distributors, market information, and public databases, it was estimated that total annual generation of UCOs in Colombia is about 225,000 t, with a per capita of ca. 5 kg/person/yr. Correspondingly, UCOs generation in Bogotá was estimated in at least 45,000 t/yr., with a major generation occurring at Household and HORECA (Hotels, Restaurants and Catering) segments. Specifically in HORECA, fast food restaurants (in particular those of hamburger and chicken) were identified as the main UCOs generators with a suitable supply for industrial exploitation. Then, UCOs samples from this segment of restaurants were subjected to physicochemical characterization by determination of density, volatile matter content, acid value, color, peroxide value, saponification value, iodine value, and content of total polar compounds. The properties associated with the degree of degradation of the oil showed a large variation, even among samples from the same origin. This heterogeneity indicates the need for a pre-treatment process before its reuse. Despite the heterogeneity of the samples, density, iodine value, and saponification value showed slight changes among the different restaurants, largely depending on the nature of the processed cooking oil rather than on the cooking conditions. The collected UCOs showed iodine values and saponification indexes ranging between 80 and 119 g I2/100 g, and 178-201 mg KOH/g, respectively. This indicates that after a suitable purification, UCOs could be used as raw material for a variety of high value oleochemicals. Finally, based upon market data, and to boost further studies, some promissory value-added derivatives are identified.
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Affiliation(s)
- Luz A Rincón
- Department of Chemical and Environmental Engineering, Universidad Nacional de Colombia, 111321 Bogotá D.C., Colombia
| | - Juan G Cadavid
- Department of Chemical and Environmental Engineering, Universidad Nacional de Colombia, 111321 Bogotá D.C., Colombia
| | - Alvaro Orjuela
- Department of Chemical and Environmental Engineering, Universidad Nacional de Colombia, 111321 Bogotá D.C., Colombia.
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