The Experts below are selected from a list of 137575926 Experts worldwide ranked by ideXlab platform
Kunjae Lee - One of the best experts on this subject based on the ideXlab platform.
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chemical separation of p and n type thermoelectric chips from waste thermoelectric module and valorization through synthesis of bi2te3 nanopowder a sustainable process for synthesis of thermoelectric materials
Journal of Chemical Technology & Biotechnology, 2017Co-Authors: Basudev Swain, Kunjae LeeAbstract:BACKGROUND A laboratory scale sustainable valorization and treatment process for waste thermoelectric chips has been developed. Both p- and n-type chips in thermoelectric modules are separated from the substrate through thermal treatment followed by chemical dissolution. Residual Pb-Sn solder from separated chips is selectively dissolved by HCl. The dissolved solders are precipitated as Sn(OH)4 and Pb(OH)2 using NaOH; these are suitable for disposal without harming the environment. From the separated chips, n-type chips are selectively separated from p-type chips through HNO3 dissolution. The p-type chips are passive to dissolution and are recovered without degradation, and can be reused in thermoelectric modules. RESULTS From the dissolved n-type thermoelectric chips from the waste thermoelectric modules, semiconductor grade, 20 nm, and 99.999% pure thermoelectric Bi2Te3 nanopowder is synthesized through wet chemical reduction using hydrazine, and can be used to manufacture n-type chips. CONCLUSION The developed e-waste management follows the cradle-to-cradle design which addresses Cradle-to-Grave challenges with EOL thermoelectric modules. The process is a clean, green, and techno-economical feasible technique for treatment and remediation of hazardous soldering material and adds value through the recovery of industrially important metals such as Bi, Te, and Sb. © 2016 Society of Chemical Industry
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Chemical separation of p‐ and n‐type thermoelectric chips from waste thermoelectric module and valorization through synthesis of Bi2Te3 nanopowder: a sustainable process for synthesis of thermoelectric materials
Journal of Chemical Technology & Biotechnology, 2016Co-Authors: Basudev Swain, Kunjae LeeAbstract:BACKGROUND A laboratory scale sustainable valorization and treatment process for waste thermoelectric chips has been developed. Both p- and n-type chips in thermoelectric modules are separated from the substrate through thermal treatment followed by chemical dissolution. Residual Pb-Sn solder from separated chips is selectively dissolved by HCl. The dissolved solders are precipitated as Sn(OH)4 and Pb(OH)2 using NaOH; these are suitable for disposal without harming the environment. From the separated chips, n-type chips are selectively separated from p-type chips through HNO3 dissolution. The p-type chips are passive to dissolution and are recovered without degradation, and can be reused in thermoelectric modules. RESULTS From the dissolved n-type thermoelectric chips from the waste thermoelectric modules, semiconductor grade, 20 nm, and 99.999% pure thermoelectric Bi2Te3 nanopowder is synthesized through wet chemical reduction using hydrazine, and can be used to manufacture n-type chips. CONCLUSION The developed e-waste management follows the cradle-to-cradle design which addresses Cradle-to-Grave challenges with EOL thermoelectric modules. The process is a clean, green, and techno-economical feasible technique for treatment and remediation of hazardous soldering material and adds value through the recovery of industrially important metals such as Bi, Te, and Sb. © 2016 Society of Chemical Industry
Basudev Swain - One of the best experts on this subject based on the ideXlab platform.
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chemical separation of p and n type thermoelectric chips from waste thermoelectric module and valorization through synthesis of bi2te3 nanopowder a sustainable process for synthesis of thermoelectric materials
Journal of Chemical Technology & Biotechnology, 2017Co-Authors: Basudev Swain, Kunjae LeeAbstract:BACKGROUND A laboratory scale sustainable valorization and treatment process for waste thermoelectric chips has been developed. Both p- and n-type chips in thermoelectric modules are separated from the substrate through thermal treatment followed by chemical dissolution. Residual Pb-Sn solder from separated chips is selectively dissolved by HCl. The dissolved solders are precipitated as Sn(OH)4 and Pb(OH)2 using NaOH; these are suitable for disposal without harming the environment. From the separated chips, n-type chips are selectively separated from p-type chips through HNO3 dissolution. The p-type chips are passive to dissolution and are recovered without degradation, and can be reused in thermoelectric modules. RESULTS From the dissolved n-type thermoelectric chips from the waste thermoelectric modules, semiconductor grade, 20 nm, and 99.999% pure thermoelectric Bi2Te3 nanopowder is synthesized through wet chemical reduction using hydrazine, and can be used to manufacture n-type chips. CONCLUSION The developed e-waste management follows the cradle-to-cradle design which addresses Cradle-to-Grave challenges with EOL thermoelectric modules. The process is a clean, green, and techno-economical feasible technique for treatment and remediation of hazardous soldering material and adds value through the recovery of industrially important metals such as Bi, Te, and Sb. © 2016 Society of Chemical Industry
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Chemical separation of p‐ and n‐type thermoelectric chips from waste thermoelectric module and valorization through synthesis of Bi2Te3 nanopowder: a sustainable process for synthesis of thermoelectric materials
Journal of Chemical Technology & Biotechnology, 2016Co-Authors: Basudev Swain, Kunjae LeeAbstract:BACKGROUND A laboratory scale sustainable valorization and treatment process for waste thermoelectric chips has been developed. Both p- and n-type chips in thermoelectric modules are separated from the substrate through thermal treatment followed by chemical dissolution. Residual Pb-Sn solder from separated chips is selectively dissolved by HCl. The dissolved solders are precipitated as Sn(OH)4 and Pb(OH)2 using NaOH; these are suitable for disposal without harming the environment. From the separated chips, n-type chips are selectively separated from p-type chips through HNO3 dissolution. The p-type chips are passive to dissolution and are recovered without degradation, and can be reused in thermoelectric modules. RESULTS From the dissolved n-type thermoelectric chips from the waste thermoelectric modules, semiconductor grade, 20 nm, and 99.999% pure thermoelectric Bi2Te3 nanopowder is synthesized through wet chemical reduction using hydrazine, and can be used to manufacture n-type chips. CONCLUSION The developed e-waste management follows the cradle-to-cradle design which addresses Cradle-to-Grave challenges with EOL thermoelectric modules. The process is a clean, green, and techno-economical feasible technique for treatment and remediation of hazardous soldering material and adds value through the recovery of industrially important metals such as Bi, Te, and Sb. © 2016 Society of Chemical Industry
Christopher A. Mitchell - One of the best experts on this subject based on the ideXlab platform.
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Development of a Cradle-to-Grave Approach for Acetylated Acidic Sophorolipid Biosurfactants
ACS Sustainable Chemistry & Engineering, 2017Co-Authors: Niki Baccile, Florence Babonneau, Ibrahim M. Banat, Katarzyna Ciesielska, Anne-sophie Cuvier, Bart Devreese, Bernd Everaert, Helen Lydon, Roger Marchant, Christopher A. MitchellAbstract:Microbial production of biosurfactants represents one of the most interesting alternatives to classical petrol-based compounds due to their low toxicity, high biodegradability, and biological production processes from renewable bioresources. However, some of the main drawbacks generally encountered are the low productivities and the small number of chemical structures available, which limit widespread application of biosurfactants. Although chemical derivatization of (microbial) biosurfactants offers opportunities to broaden the panel of available molecules, direct microbial synthesis is still the preferred option and the use of engineered strains is becoming a valid alternative. In this multidisciplinary work we show the entire process of conception, upscaling of fermentation (150 L) and sustainable purification (filtration), application (foaming, solubilization, antibacterial), and life cycle analysis of acetylated acidic sophorolipids, directly produced by the Starmerella bombicola esterase knock out yeast strain, rather than purified using chromatography from the classical, but complex, mixture of acidic and lactonic sophorolipids.
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development of a cradle to grave approach for acetylated acidic sophorolipid biosurfactants
ACS Sustainable Chemistry & Engineering, 2017Co-Authors: Niki Baccile, Florence Babonneau, Ibrahim M. Banat, Katarzyna Ciesielska, Anne-sophie Cuvier, Bart Devreese, Bernd Everaert, Helen Lydon, Roger Marchant, Christopher A. MitchellAbstract:Microbial production of biosurfactants represents one of the most interesting alternatives to classical petrol-based compounds due to their low toxicity, high biodegradability, and biological production processes from renewable bioresources. However, some of the main drawbacks generally encountered are the low productivities and the small number of chemical structures available, which limit widespread application of biosurfactants. Although chemical derivatization of (microbial) biosurfactants offers opportunities to broaden the panel of available molecules, direct microbial synthesis is still the preferred option and the use of engineered strains is becoming a valid alternative. In this multidisciplinary work we show the entire process of conception, upscaling of fermentation (150 L) and sustainable purification (filtration), application (foaming, solubilization, antibacterial), and life cycle analysis of acetylated acidic sophorolipids, directly produced by the Starmerella bombicola esterase knock out y...
Nicholas P. Lavery - One of the best experts on this subject based on the ideXlab platform.
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life cycle assessment of sponge nickel produced by gas atomisation for use in industrial hydrogenation catalysis applications
International Journal of Life Cycle Assessment, 2013Co-Authors: David J. Jarvis, Nicholas J.e. Adkins, Nicholas P. Lavery, Stephen G. R. Brown, Benjamin P. WilsonAbstract:Purpose This paper presents a Cradle-to-Grave comparative life cycle assessment (LCA) of new gas atomised (GA) sponge nickel catalysts and evaluates their performance against the current cast and crush standard currently used in the industrial hydrogenation of butyraldehyde to butanol.
L. A. Senhen - One of the best experts on this subject based on the ideXlab platform.
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Hazardous substance management system (HSMS): Full ``cradle to grave`` implementation at Space and Naval Warfare Systems Center, San Diego
1998Co-Authors: J.n. Krake, R.d. Boss, M. J. Taylor, L. A. SenhenAbstract:The Hazardous Substance Management System (HSMS) is an automated system for `cradle to grave` tracking and managing of hazardous material (HM) and hazardous waste (HW). This paper describes the procedure for disposition of hazardous material as waste, the pilot transfer of hazardous waste, and how the Space and Naval Warfare Systems Center, San Diego (SSC SD) has successfully implemented HSMS to track HM and HW from cradle to grave.
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HSMS: Full "Cradle to Grave" Implementation at Spawar Systems Center - San Diego
1998Co-Authors: J.n. Krake, R.d. Boss, M. J. Taylor, L. A. SenhenAbstract:Abstract : The Hazardous Substance Management System (HSMS) is an automated system for "cradle to grave" tracking and managing of hazardous material (HM) and hazardous waste (HW). This paper describes the procedure for disposition of hazardous material as waste, the pilot transfer of hazardous waste, and how the Space and Naval Warfare Systems Center, San Diego (SSC SD) has successfully implemented HSMS to track HM and HW from cradle to grave.
