PMID- 37311388
OWN - NLM
STAT- MEDLINE
DCOM- 20230822
LR  - 20230822
IS  - 1879-2456 (Electronic)
IS  - 0956-053X (Linking)
VI  - 168
DP  - 2023 Aug 1
TI  - Dechlorination and fuel gas generation in chemical looping conversion of waste 
      PVC over inherently Na/Ca/K-containing bauxite residue-based oxygen carriers.
PG  - 211-220
LID - S0956-053X(23)00379-3 [pii]
LID - 10.1016/j.wasman.2023.05.032 [doi]
AB  - The inert atmosphere in chemical looping (CL) technology can considerably inhibit 
      the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans during the 
      thermal treatment of polyvinyl chloride plastic (PVC) waste. In this study, PVC 
      was innovatively converted to dechlorinated fuel gas via CL gasification under a 
      high reaction temperature (RT) and the inert atmosphere by applying an unmodified 
      bauxite residue (BR) as both a dechlorination agent and oxygen carrier. The 
      dechlorination efficiency reached 49.98% at an oxygen ratio of only 0.1. 
      Furthermore, a moderate RT (750  degrees C in this study) and an increased oxygen ratio 
      enhanced the dechlorination effect. The highest dechlorination efficiency 
      (92.12%) was achieved at an oxygen ratio of 0.6. Iron oxides in BR improved the 
      generation of syngas from CL reactions. The yields of the effective gases (CH(4), 
      H(2), and CO) increased by 57.13% to 0.121 Nm(3)/kg with an increase in oxygen 
      ratio from 0 to 0.6. A high RT improved the production of the effective gases (an 
      809.39% increase to 0.344 Nm(3)/kg from 600 to 900  degrees C). Energy-dispersive 
      spectroscopy and X-ray diffraction were used to study the mechanism, and 
      formation of NaCl and Fe(3)O(4) was observed on the reacted BR, indicating the 
      successful adsorption of Cl and its capability as an oxygen carrier. Therefore, 
      BR eliminated Cl in situ and enhanced the generation of value-added syngas, 
      thereby achieving efficient PVC conversion.
CI  - Copyright (c) 2023 Elsevier Ltd. All rights reserved.
FAU - Du, Xudong
AU  - Du X
AD  - State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power 
      Engineering, Zhejiang University, Hangzhou 310027, China.
FAU - Wang, Jun
AU  - Wang J
AD  - State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power 
      Engineering, Zhejiang University, Hangzhou 310027, China.
FAU - Song, Jiaxing
AU  - Song J
AD  - State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power 
      Engineering, Zhejiang University, Hangzhou 310027, China.
FAU - Sima, Jingyuan
AU  - Sima J
AD  - State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power 
      Engineering, Zhejiang University, Hangzhou 310027, China.
FAU - Zhu, Chenxi
AU  - Zhu C
AD  - State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power 
      Engineering, Zhejiang University, Hangzhou 310027, China.
FAU - Huang, Qunxing
AU  - Huang Q
AD  - State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power 
      Engineering, Zhejiang University, Hangzhou 310027, China; Jiaxing Research 
      Institute, Zhejiang University, Jiaxing 314000, China. Electronic address: 
      hqx@zju.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20230611
PL  - United States
TA  - Waste Manag
JT  - Waste management (New York, N.Y.)
JID - 9884362
RN  - S88TT14065 (Oxygen)
RN  - 0 (Gases)
RN  - 0 (Polychlorinated Dibenzodioxins)
RN  - 9002-86-2 (Polyvinyl Chloride)
SB  - IM
MH  - *Oxygen
MH  - Gases
MH  - Hot Temperature
MH  - *Polychlorinated Dibenzodioxins
MH  - Polyvinyl Chloride
OTO - NOTNLM
OT  - Bauxite residue
OT  - Dechlorination
OT  - Gasification
OT  - Oxygen carrier
OT  - Polyvinyl chloride
COIS- Declaration of Competing Interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/06/14 01:10
MHDA- 2023/08/22 06:42
CRDT- 2023/06/13 18:04
PHST- 2022/12/19 00:00 [received]
PHST- 2023/05/14 00:00 [revised]
PHST- 2023/05/21 00:00 [accepted]
PHST- 2023/08/22 06:42 [medline]
PHST- 2023/06/14 01:10 [pubmed]
PHST- 2023/06/13 18:04 [entrez]
AID - S0956-053X(23)00379-3 [pii]
AID - 10.1016/j.wasman.2023.05.032 [doi]
PST - ppublish
SO  - Waste Manag. 2023 Aug 1;168:211-220. doi: 10.1016/j.wasman.2023.05.032. Epub 2023 
      Jun 11.