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Comparative study on the efficiency and environmental impact of two methods of utilizing polyvinyl chloride waste based on life cycle assessments

WU Yuehui,WANG Guoliang,WANG Zhen,LIU Yi,GU Ping,SUN Dezhi

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 451-462 doi: 10.1007/s11783-013-0614-0

Abstract: Two processes of utilizing polyvinyl chloride (PVC) waste, an incineration process and a vacuum pyrolysisAs well, we established an inventory of PVC waste from incineration and vacuum pyrolysis based on processwas twice as high as that of the vacuum pyrolysis process.Incineration had a larger total environmental impact potential than vacuum pyrolysis.Overall, the vacuum pyrolysis process has a number advantages and greater potential for development of

Keywords： polyvinyl chloride waste     utilization     incineration process     vacuum pyrolysis process     life cycle assessment    

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Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 8-14 doi: 10.1007/s11783-008-0030-z

Abstract: Temperature is the determining factor of pyrolysis, which is one of the alternative technologies forThe effects of final operating temperature ranging from 350 to 550°C on pyrolysis products of oil sludgeand energy tend to shift from solid to liquid and gas phase (especially to liquid phase) during the process, and the optimum temperature for oil sludge pyrolysis is 500°C.

Keywords： sludge treatment     corresponding     Temperature     liquid     process    

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Integrated adsorption and absorption process for post-combustion CO

Gongkui Xiao, Penny Xiao, Andrew Hoadley, Paul Webley

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 483-492 doi: 10.1007/s11705-020-1964-3

Abstract: This study explored the feasibility of integrating an adsorption and solvent scrubbing process for post-combustionThis integrated process has two stages: the first is a vacuum swing adsorption (VSA) process using activatedThe results showed that the adsorption process could enrich CO in the flue gas from 12 to 50 mol-% withIn addition, the VSA process could also remove most of the oxygen initially existed in the feed gas,

Keywords： vacuum swing adsorption     monoethanolamine     post-combustion     CO2 capture     integrated process    

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Recent advances in the catalytic pyrolysis of biomass

Changwei HU, Yu YANG, Jia LUO, Pan PAN, Dongmei TONG, Guiying LI

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 188-193 doi: 10.1007/s11705-010-1015-6

Abstract: This paper briefly surveys the present status of the direct catalytic pyrolysis for the liquefactionThe direct use of catalysts could decrease the pyrolysis temperature, increase the conversion of biomassThese barriers appeal for the development of a new catalyst and new catalytic process as well as theProcess design and process intensification are of significant importance in the catalytic conversion

Keywords： biomass     liquefaction     catalysis     bio-oil     process intensification    

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Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 239-248 doi: 10.1007/s11709-011-0110-1

Abstract: Surcharge load (e.g. embankment fill) will induce settlement and outward lateral displacement, while vacuumIdeally, combination of surcharge load and vacuum pressure can reduce or minimize the lateral displacementthe main influencing factors on lateral displacement of a soft clayey ground under the combination of vacuumthat the outward lateral displacement increases with the increase of the ratio of surcharge load to vacuumTo predict the lateral displacement of a ground under the combination of surcharge load and vacuum pressure

Keywords： vacuum consolidation     lateral displacement     PVD     finite element analysis     surcharge load    

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Numerical study of conduction and radiation heat losses from vacuum annulus in parabolic trough receivers

Dongqiang LEI, Yucong REN, Zhifeng WANG

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1048-1059 doi: 10.1007/s11708-020-0670-7

Abstract: Parabolic trough receiver is a key component to convert solar energy into thermal energy in the parabolic trough solar system. The heat loss of the receiver has an important influence on the thermal efficiency and the operating cost of the power station. In this paper, conduction and radiation heat losses are analyzed respectively to identify the heat loss mechanism of the receiver. A 2-D heat transfer model is established by using the direct simulation Monte Carlo method for rarefied gas flow and heat transfer within the annulus of the receiver to predict the conduction heat loss caused by residual gases. The numerical results conform to the experimental results, and show the temperature of the glass envelope and heat loss for various conditions in detail. The effects of annulus pressure, gas species, temperature of heat transfer fluid, and annulus size on the conduction and radiation heat losses are systematically analyzed. Besides, the main factors that cause heat loss are analyzed, providing a theoretical basis for guiding the improvement of receiver, as well as the operation and maintenance strategy to reduce heat loss.

Keywords： parabolic trough receiver     vacuum annulus     rarefied gas     DSMC (direct simulation Monte Carlo)     heat loss    

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Thermodynamic analysis of reaction pathways and equilibrium yields for catalytic pyrolysis of naphtha

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1700-1712 doi: 10.1007/s11705-022-2207-6

Abstract: length and hydrocarbon type significantly affect the production of light olefins during the catalytic pyrolysisand operation parameters optimization, the reaction pathways and equilibrium yields for the catalytic pyrolysisdevelopment of superior catalysts and the selection of proper operation parameters for the catalytic pyrolysis

Keywords： naphtha     catalytic pyrolysis     reaction pathway     equilibrium yield    

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interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1162-1182 doi: 10.1007/s11705-022-2276-6

Abstract: to fabricate lycopodium/polyvinylidene fluoride flat-sheet membrane for desalination applications by vacuummembrane distillation process.In vacuum membrane distillation experiments, using a 15000 ppm NaCl solution as a feed at 70 °C, the

Keywords： lycopodium     hydrophobicity     vacuum membrane distillation     desalination    

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Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 142-147 doi: 10.1007/s11708-015-0357-7

Abstract: The analysis of the failure mechanics, namely hydrogen permeation of vacuum insulated tubing (VIT), indicatedTo solve this problem, some measures by using non-vacuum materials were proposed and analyzed in this

Keywords： vacuum insulated tubing     cyclic steam stimulation     insulation material     thermal conductivity     foam-glass    

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Self-catalytic pyrolysis thermodynamics of waste printed circuit boards with co-existing metals

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1581-0

Abstract: >

● The co-existing metals in WPCBs has positive catalytic influence in pyrolysis

Keywords： Waste printed circuit board     Catalyst     Pyrolysis     Kinetics    

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Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1488-1

Abstract:

• Adding kaolin/zeolite promotes the formation of stable heavy metals.

Keywords： Co-pyrolysis     Sewage sludge     Heavy metals     Rotary kiln     Immobilization mechanism    

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Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-021-1489-0

Abstract:

• UV/VUV/I– induces substantial H2O2 and IO3– formation, but UV/I– does not.

Keywords： Vacuum ultraviolet     Hydrogen peroxide     Iodate     Hydroxyl radical     Redox transition    

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Theoretical study on the mechanism of sulfur migration to gas in the pyrolysis of benzothiophene

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 334-346 doi: 10.1007/s11705-022-2209-4

Abstract: The release and control of sulfur species in the pyrolysis of fossil fuels and solid wastes have attractedthe mechanism of sulfur migration during the release of sulfur-containing radicals in benzothiophene pyrolysisstrong competitiveness of S and SH radicals results in abundant H2S during benzothiophene pyrolysisstudy lays a foundation for elucidating sulfur migration mechanisms and furthering the development of pyrolysis

Keywords： benzothiophene     sulfur migration     pyrolysis     density functional theory    

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Effect of / molecular structures on pyrolysis performance and heat sink of decalin isomers

Frontiers of Chemical Science and Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11705-023-2375-z

Abstract: However, decalin contains two isomers with a tunable composition, and their effects on the pyrolysisHerein, we investigated the pyrolysis of decalin isomers, i.e., cis-decalin, trans-decalinThe pyrolysis results confirmed that conversion of the tested fuels (600–725 °C, 4 MPa) decreased inDetailed analyses of the pyrolysis products were used to compare the product distributions from cisThis work demonstrates the relationship between the cis/trans structures and the pyrolysis

Keywords： endothermic fuel     decalin     pyrolysis     heat sink     molecular structure    

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Fast and catalytic pyrolysis of xylan: Effects of temperature and M/HZSM-5 (M= Fe, Zn) catalysts on pyrolytic

Xifeng ZHU, Qiang LU, Wenzhi LI, Dong ZHANG,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 424-429 doi: 10.1007/s11708-010-0015-z

Abstract: Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) was employed to achieve fast pyrolysis of xylanand on-line analysis of pyrolysis vapors.temperature on pyrolytic products, and to reveal the effect of HZSM-5 and M/HZSM-5 (M= Fe, Zn) zeolites on pyrolysisCatalytic cracking of pyrolysis vapors with HZSM-5 and M/HZSM-5 (M= Fe, Zn) catalysts significantly altered

Keywords： xylan     fast pyrolysis     catalytic pyrolysis     Py-GC/MS     HZSM-5    

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Title Author Date Type Operation

Comparative study on the efficiency and environmental impact of two methods of utilizing polyvinyl chloride waste based on life cycle assessments

WU Yuehui,WANG Guoliang,WANG Zhen,LIU Yi,GU Ping,SUN Dezhi

Journal Article

Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

Journal Article

Integrated adsorption and absorption process for post-combustion CO

Gongkui Xiao, Penny Xiao, Andrew Hoadley, Paul Webley

Journal Article

Recent advances in the catalytic pyrolysis of biomass

Changwei HU, Yu YANG, Jia LUO, Pan PAN, Dongmei TONG, Guiying LI

Journal Article

Lateral displacement of soft ground under vacuum pressure and surcharge load

Chin-Yee ONG, Jin-Chun CHAI

Journal Article

Numerical study of conduction and radiation heat losses from vacuum annulus in parabolic trough receivers

Dongqiang LEI, Yucong REN, Zhifeng WANG

Journal Article

Thermodynamic analysis of reaction pathways and equilibrium yields for catalytic pyrolysis of naphtha

Journal Article

interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum

Journal Article

Novel methods by using non-vacuum insulated tubing to extend the lifetime of the tubing

Chenglong ZHOU,Guojin ZHU,Yongxiang XU,Jifei YU,Xiaoliang ZHANG,Hongzhi SHENG

Journal Article

Self-catalytic pyrolysis thermodynamics of waste printed circuit boards with co-existing metals

Journal Article

Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Journal Article

Toward better understanding vacuum ultraviolet–iodide induced photolysis via hydrogen peroxide formation

Journal Article

Theoretical study on the mechanism of sulfur migration to gas in the pyrolysis of benzothiophene

Journal Article

Effect of / molecular structures on pyrolysis performance and heat sink of decalin isomers

Journal Article

Fast and catalytic pyrolysis of xylan: Effects of temperature and M/HZSM-5 (M= Fe, Zn) catalysts on pyrolytic

Xifeng ZHU, Qiang LU, Wenzhi LI, Dong ZHANG,

Journal Article