The Experts below are selected from a list of 4320 Experts worldwide ranked by ideXlab platform
George Manos - One of the best experts on this subject based on the ideXlab platform.
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polymer degradation to fuels over microporous catalysts as a novel tertiary plastic Recycling Method
Polymer Degradation and Stability, 2004Co-Authors: Karishma Gobin, George ManosAbstract:Abstract The catalytic degradation of polyethylene over various microporous materials—zeolites, zeolite-based commercial cracking catalysts as well as clays and their pillared analogues—was studied in a semi-batch reactor. Over all catalysts the liquid products formed had a boiling point distribution in the range of motor engine fuels, which increases considerably the viability of the Method as a commercial Recycling process. From the zeolites, ZSM-5 resulted mostly in gaseous products and almost no coking due to its shape selectivity properties. Commercial cracking catalysts fully degraded the polymer resulting in higher liquid yield and lower coke content than their parent ultrastable Y zeolite. This confirmed the suitability of such catalysts for a polymer Recycling process and its commercialisation potential, as it confirmed the potential of plastic waste being co-fed into a refinery cracking unit. Clays, saponite and Zenith-N, a montmorillonite, and their pillared analogues were less active than zeolites, but could fully degrade the polymer. They showed enhanced liquid formation, due to their mild acidity, and lower coke formation. Regenerated pillared clays offered practically the same performance as fresh samples, but their original clays' performance deteriorated after removal of the formed coke. Although performance of the regenerated saponite was satisfactory, with the regenerated Zenith the structural damage was so extensive that plastic was only partly degraded.
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Polymer degradation to fuels over microporous catalysts as a novel tertiary plastic Recycling Method
Polymer Degradation and Stability, 2004Co-Authors: Karishma Gobin, George ManosAbstract:The catalytic degradation of polyethylene over various microporous materials - zeolites, zeolite-based commercial cracking catalysts as well as clays and their pillared analogues - was studied in a semi-batch reactor. Over all catalysts the liquid products formed had a boiling point distribution in the range of motor engine fuels, which increases considerably the viability of the Method as a commercial Recycling process. From the zeolites, ZSM-5 resulted mostly in gaseous products and almost no coking due to its shape selectivity properties. Commercial cracking catalysts fully degraded the polymer resulting in higher liquid yield and lower coke content than their parent ultrastable Y zeolite. This confirmed the suitability of such catalysts for a polymer Recycling process and its commercialisation potential, as it confirmed the potential of plastic waste being co-fed into a refinery cracking unit. Clays, saponite and Zenith-N, a montmorillonite, and their pillared analogues were less active than zeolites, but could fully degrade the polymer. They showed enhanced liquid formation, due to their mild acidity, and lower coke formation. Regenerated pillared clays offered practically the same performance as fresh samples, but their original clays' performance deteriorated after removal of the formed coke. Although performance of the regenerated saponite was satisfactory, with the regenerated Zenith the structural damage was so extensive that plastic was only partly degraded. © 2003 Elsevier Ltd. All rights reserved.
Karishma Gobin - One of the best experts on this subject based on the ideXlab platform.
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polymer degradation to fuels over microporous catalysts as a novel tertiary plastic Recycling Method
Polymer Degradation and Stability, 2004Co-Authors: Karishma Gobin, George ManosAbstract:Abstract The catalytic degradation of polyethylene over various microporous materials—zeolites, zeolite-based commercial cracking catalysts as well as clays and their pillared analogues—was studied in a semi-batch reactor. Over all catalysts the liquid products formed had a boiling point distribution in the range of motor engine fuels, which increases considerably the viability of the Method as a commercial Recycling process. From the zeolites, ZSM-5 resulted mostly in gaseous products and almost no coking due to its shape selectivity properties. Commercial cracking catalysts fully degraded the polymer resulting in higher liquid yield and lower coke content than their parent ultrastable Y zeolite. This confirmed the suitability of such catalysts for a polymer Recycling process and its commercialisation potential, as it confirmed the potential of plastic waste being co-fed into a refinery cracking unit. Clays, saponite and Zenith-N, a montmorillonite, and their pillared analogues were less active than zeolites, but could fully degrade the polymer. They showed enhanced liquid formation, due to their mild acidity, and lower coke formation. Regenerated pillared clays offered practically the same performance as fresh samples, but their original clays' performance deteriorated after removal of the formed coke. Although performance of the regenerated saponite was satisfactory, with the regenerated Zenith the structural damage was so extensive that plastic was only partly degraded.
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Polymer degradation to fuels over microporous catalysts as a novel tertiary plastic Recycling Method
Polymer Degradation and Stability, 2004Co-Authors: Karishma Gobin, George ManosAbstract:The catalytic degradation of polyethylene over various microporous materials - zeolites, zeolite-based commercial cracking catalysts as well as clays and their pillared analogues - was studied in a semi-batch reactor. Over all catalysts the liquid products formed had a boiling point distribution in the range of motor engine fuels, which increases considerably the viability of the Method as a commercial Recycling process. From the zeolites, ZSM-5 resulted mostly in gaseous products and almost no coking due to its shape selectivity properties. Commercial cracking catalysts fully degraded the polymer resulting in higher liquid yield and lower coke content than their parent ultrastable Y zeolite. This confirmed the suitability of such catalysts for a polymer Recycling process and its commercialisation potential, as it confirmed the potential of plastic waste being co-fed into a refinery cracking unit. Clays, saponite and Zenith-N, a montmorillonite, and their pillared analogues were less active than zeolites, but could fully degrade the polymer. They showed enhanced liquid formation, due to their mild acidity, and lower coke formation. Regenerated pillared clays offered practically the same performance as fresh samples, but their original clays' performance deteriorated after removal of the formed coke. Although performance of the regenerated saponite was satisfactory, with the regenerated Zenith the structural damage was so extensive that plastic was only partly degraded. © 2003 Elsevier Ltd. All rights reserved.
Leo A. Behie - One of the best experts on this subject based on the ideXlab platform.
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Ultrapyrolytic cracking of polyethylene — a high yield Recycling Method
Chemical Engineering Science, 1996Co-Authors: Sean F. Sodero, Franco Berruti, Leo A. BehieAbstract:Abstract Intrinsic chemical kinetics for the ultrapyrolysis of waste plastics are needed to assess the feasibility for this technology of processing if it is to be used for tertiary Recycling. The purpose of this study was to quantify the effect of various operating factors for the pyrolysis of low-density polyethylene (LDPE), a common polymer found in plastic wastes, and determine viable operating conditions for maximizing the production of high value products such as ethylene, propylene, butadiene. Experiments were performed using both a batch micro-reactor and pilot plant sized reactor. The key operating factors considered were temperature and reaction time, with the reaction systems operated under isothermal conditions. In the micro-reactor experiments, LDPE was pyrolyzed at temperatures of 800°C and 900°C, with total reaction times ranging from 350 to 2500 milliseconds. Experiments completed with the pilot plant also produced excellent results with light olefin production reaching 75 wt% at 800°C.
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Ultrapyrolytic cracking of polyethylene - A high yield Recycling Method
Chemical Engineering Science, 1996Co-Authors: Sean F. Sodero, Franco Berruti, Leo A. BehieAbstract:Intrinsic chemical kinetics for the ultrapyrolysis of waste plastics are needed to assess the feasibility for this technology of processing if it is to be used for tertiary Recycling. The purpose of this study was to quantify the effect of various operating factors for the pyrolysis of low-density polyethylene (LDPE), a common polymer found in plastic wastes, and determine viable operating conditions for maximizing the production of high value products such as ethylene, propylene, butadiene. Experiments were performed using both a batch micro-reactor and pilot plant sized reactor. The key operating factors considered were temperature and reaction time, with the reaction systems operated under isothermal conditions. In the micro-reactor experiments, LDPE was pyrolyzed at temperatures of 800°C and 900°C, with total reaction times ranging from 350 to 2500 milliseconds. Experiments completed with the pilot plant also produced excellent results with light olefin production reaching 75 wt % at 800°C.
Sean F. Sodero - One of the best experts on this subject based on the ideXlab platform.
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Ultrapyrolytic cracking of polyethylene — a high yield Recycling Method
Chemical Engineering Science, 1996Co-Authors: Sean F. Sodero, Franco Berruti, Leo A. BehieAbstract:Abstract Intrinsic chemical kinetics for the ultrapyrolysis of waste plastics are needed to assess the feasibility for this technology of processing if it is to be used for tertiary Recycling. The purpose of this study was to quantify the effect of various operating factors for the pyrolysis of low-density polyethylene (LDPE), a common polymer found in plastic wastes, and determine viable operating conditions for maximizing the production of high value products such as ethylene, propylene, butadiene. Experiments were performed using both a batch micro-reactor and pilot plant sized reactor. The key operating factors considered were temperature and reaction time, with the reaction systems operated under isothermal conditions. In the micro-reactor experiments, LDPE was pyrolyzed at temperatures of 800°C and 900°C, with total reaction times ranging from 350 to 2500 milliseconds. Experiments completed with the pilot plant also produced excellent results with light olefin production reaching 75 wt% at 800°C.
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Ultrapyrolytic cracking of polyethylene - A high yield Recycling Method
Chemical Engineering Science, 1996Co-Authors: Sean F. Sodero, Franco Berruti, Leo A. BehieAbstract:Intrinsic chemical kinetics for the ultrapyrolysis of waste plastics are needed to assess the feasibility for this technology of processing if it is to be used for tertiary Recycling. The purpose of this study was to quantify the effect of various operating factors for the pyrolysis of low-density polyethylene (LDPE), a common polymer found in plastic wastes, and determine viable operating conditions for maximizing the production of high value products such as ethylene, propylene, butadiene. Experiments were performed using both a batch micro-reactor and pilot plant sized reactor. The key operating factors considered were temperature and reaction time, with the reaction systems operated under isothermal conditions. In the micro-reactor experiments, LDPE was pyrolyzed at temperatures of 800°C and 900°C, with total reaction times ranging from 350 to 2500 milliseconds. Experiments completed with the pilot plant also produced excellent results with light olefin production reaching 75 wt % at 800°C.
N. Hari Prakash - One of the best experts on this subject based on the ideXlab platform.
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Integrated Fuzzy AHP-TOPSIS for selecting the best plastic Recycling Method: A case study
Applied Mathematical Modelling, 2014Co-Authors: Sekar Vinodh, M Prasanna, N. Hari PrakashAbstract:Due to the rapid depletion of natural resources and undesired environmental changes in a global scale, it is necessary to conserve the natural resources and protect the environment. Industries which manufacture plastic based products have the necessity to recycle plastics. There are number of Methods to recycle plastics. Since the selection of the best Recycling Method involves complex decision variables, it is considered to be a multiple criteria decision-making (MCDM) problem. This article develops an evaluation model based on the fuzzy Analytic Hierarchy Process (AHP) and the technique for order performance by similarity to ideal solution (TOPSIS) to enable the industry practitioners to perform performance evaluation in a fuzzy environment. The purpose of the study is to determine the best Method for Recycling plastics among the various plastic Recycling processes. By observing the results, it is identified that mechanical Recycling process is found to be the best plastic Recycling process using the integrated approach.
