國立高雄大學圖資館 |

登入

回首頁

Polystyrene Upcycling Using a Two-Ring Non-Thermal Plasma-Catalysis Reactor /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Polystyrene Upcycling Using a Two-Ring Non-Thermal Plasma-Catalysis Reactor /Nijel Jamil Mitchell Rogers.
作者:	Rogers, Nijel Jamil Mitchell,
面頁冊數:	1 electronic resource (60 pages)
附註:	Source: Masters Abstracts International, Volume: 85-12.
附註:	Advisors: Koel, Bruce E.
Contained By:	Masters Abstracts International85-12.
標題:	Chemical engineering.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31295467
ISBN:	9798382810041

Polystyrene Upcycling Using a Two-Ring Non-Thermal Plasma-Catalysis Reactor /
Rogers, Nijel Jamil Mitchell,

Polystyrene Upcycling Using a Two-Ring Non-Thermal Plasma-Catalysis Reactor /Nijel Jamil Mitchell Rogers. - 1 electronic resource (60 pages)

Source: Masters Abstracts International, Volume: 85-12.

Current plastic recycling technologies strain to effectively mitigate the rapid increase and disposal of plastic waste. Polystyrene (PS) is one plastic of particular concern due to its chemical stability and resistance to degradation without special treatment. Cost-intensive separation of PS from other waste contaminants constrains mechanical recycling methods whereas chemical recycling techniques, such as pyrolysis or gasification, require high temperatures (~780 K) to achieve PS depolymerization.Non-thermal plasma (NTP)-facilitated plastic upcycling has drawn increasing attention due to the presence of energized electrons, ions, and other species within the NTP able to initiate chemical reactions at ambient conditions. However, more research is needed to understand how NTP-driven reactor design (reactor configuration, packing conditions, and other parameters) can be tailored for desired PS upcycling outcomes.This thesis seeks to characterize the overall conversion and product selectivity of polystyrene degradation under varying reactor conditions with a two-ring dielectric barrier discharge (DBD) reactor operating under a hydrogen (H2) and argon (Ar) co-fed gas mixture. Key parameters studied included the influence of packing material, reaction time, reactor pressure, and catalyst loading.Our results starting at ambient temperature, 300 Torr, 15.3 W discharge power, and a flow of 100 mL min-1 (sccm) 40% H2/Ar showed that ~ 30 wt% of the initial PS mass can be converted to gaseous products within the first 15 minutes and up to 81 wt% within the first hour. Gaseous yields were considerably higher than liquid yields, and methane was the primary gas component. The highest yield of ethane and ethylene, at 11 and 1.5 mol% respectively, were achieved within the first five minutes under non-catalytic conditions. Within the reactor volume, the configuration of the quartz wool (QW) support clearly influenced plasma discharge characteristics. Under the studied parameters, the partial packing of QW created higher average power in the plasma discharge, and as high as a 76% increase, in contrast to when fully packed with QW. While varying reactor conditions and catalyst selection showed only a marginal change of product selectivity, this NTP reactor configuration demonstrates a promising approach for rapid PS depolymerization under ambient conditions with moderate discharge power.

English

ISBN: 9798382810041Subjects--Topical Terms:

206267
Chemical engineering.
Subjects--Index Terms:

Non-thermal plasma

Polystyrene Upcycling Using a Two-Ring Non-Thermal Plasma-Catalysis Reactor /
LDR:03818nmm a22004453i 4500 001 676323
005 20250420214343.5
006 m o d
007 cr|nu||||||||
008 250901s2024 miu||||||m |||||||eng d
020 $a 9798382810041
035 $a (MiAaPQD)AAI31295467
035 $a AAI31295467
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Rogers, Nijel Jamil Mitchell, $e author. $0 (orcid)0009-0006-5409-8738 $3 990096
245 1 0 $a Polystyrene Upcycling Using a Two-Ring Non-Thermal Plasma-Catalysis Reactor / $c Nijel Jamil Mitchell Rogers.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (60 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 85-12.
500 $a Advisors: Koel, Bruce E.
502 $b M.S.E. $c Princeton University $d 2024.
520 $a Current plastic recycling technologies strain to effectively mitigate the rapid increase and disposal of plastic waste. Polystyrene (PS) is one plastic of particular concern due to its chemical stability and resistance to degradation without special treatment. Cost-intensive separation of PS from other waste contaminants constrains mechanical recycling methods whereas chemical recycling techniques, such as pyrolysis or gasification, require high temperatures (~780 K) to achieve PS depolymerization.Non-thermal plasma (NTP)-facilitated plastic upcycling has drawn increasing attention due to the presence of energized electrons, ions, and other species within the NTP able to initiate chemical reactions at ambient conditions. However, more research is needed to understand how NTP-driven reactor design (reactor configuration, packing conditions, and other parameters) can be tailored for desired PS upcycling outcomes.This thesis seeks to characterize the overall conversion and product selectivity of polystyrene degradation under varying reactor conditions with a two-ring dielectric barrier discharge (DBD) reactor operating under a hydrogen (H2) and argon (Ar) co-fed gas mixture. Key parameters studied included the influence of packing material, reaction time, reactor pressure, and catalyst loading.Our results starting at ambient temperature, 300 Torr, 15.3 W discharge power, and a flow of 100 mL min-1 (sccm) 40% H2/Ar showed that ~ 30 wt% of the initial PS mass can be converted to gaseous products within the first 15 minutes and up to 81 wt% within the first hour. Gaseous yields were considerably higher than liquid yields, and methane was the primary gas component. The highest yield of ethane and ethylene, at 11 and 1.5 mol% respectively, were achieved within the first five minutes under non-catalytic conditions. Within the reactor volume, the configuration of the quartz wool (QW) support clearly influenced plasma discharge characteristics. Under the studied parameters, the partial packing of QW created higher average power in the plasma discharge, and as high as a 76% increase, in contrast to when fully packed with QW. While varying reactor conditions and catalyst selection showed only a marginal change of product selectivity, this NTP reactor configuration demonstrates a promising approach for rapid PS depolymerization under ambient conditions with moderate discharge power.
546 $a English
590 $a School code: 0181
650 4 $a Chemical engineering. $3 206267
650 4 $a Materials science. $3 221779
650 4 $a Plasma physics. $3 990097
653 $a Non-thermal plasma
653 $a Plastics
653 $a Polystyrene
653 $a Upcycling
653 $a Chemical stability
653 $a Quartz wool
690 $a 0542
690 $a 0794
690 $a 0759
710 2 $a Princeton University. $b Chemical and Biological Engineering. $3 708630
720 1 $a Koel, Bruce E. $e degree supervisor.
773 0 $t Masters Abstracts International $g 85-12.
790 $a 0181
791 $a M.S.E.
792 $a 2024
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31295467