Catalytic dehydrochlorination of 1,2-dichloroethane to produce vinyl chloride over N-doped coconut activated carbon

RSC Advances ◽  
2015 ◽  
Vol 5 (126) ◽  
pp. 104071-104078 ◽  
Author(s):  
Wei Zhao ◽  
Mengxia Sun ◽  
Haiyang Zhang ◽  
Yanzhao Dong ◽  
Xiaoyan Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Vinyl Chloride ◽  
Catalytic Dehydrochlorination

Pyridinic and pyrrolic nitrogen dopants in the N-AC catalyst can adsorb EDC and increase the activity for EDC dehydrochlorination.

scholarly journals Catalytic Dehydrochlorination of 1,2-Dichloroethane into Vinyl Chloride over Nitrogen-Doped Activated Carbon

ACS Omega ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 2081-2089 ◽  
Author(s):  
Hong Zhao ◽  
Siyuan Chen ◽  
Mengting Guo ◽  
Dan Zhou ◽  
Zhaobin Shen ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Vinyl Chloride ◽  
Nitrogen Doped ◽  
Catalytic Dehydrochlorination

Catalytic dehydrochlorination of 1,2-dichloroethane into vinyl chloride over polyacrylonitrile-based active carbon fiber

1999 ◽  
Vol 180 (1-2) ◽  
pp. 317-323 ◽  
Author(s):  
Chiaki Sotowa ◽  
Yoshiro Watanabe ◽  
Shunsuke Yatsunami ◽  
Yozo Korai ◽  
Isao Mochida
Keyword(s):  
Carbon Fiber ◽  
Vinyl Chloride ◽  
Active Carbon ◽  
Catalytic Dehydrochlorination

Sequential anaerobic/aerobic biodegradation of chlorinated hydrocarbons in activated carbon barriers

2002 ◽  
Vol 2 (2) ◽  
pp. 51-58 ◽  
Author(s):  
A. Tiehm ◽  
M. Gozan ◽  
A. Müller ◽  
H. Schell ◽  
H. Lorbeer ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Biological Activity ◽  
Activated Carbon ◽  
Vinyl Chloride ◽  
Reductive Dechlorination ◽  
Chlorinated Hydrocarbons ◽  
Aerobic Biodegradation ◽  
Anaerobic Conditions ◽  
Biological Activated Carbon ◽  
Batch Tests

The aim of this study is to develop a long lasting, sequential anaerobic/aerobic biological activated carbon barrier. In the biobarrier, pollutant adsorption on granular activated carbon (GAC) and biodegradation occur simultaneously. Trichloroethene (TCE), chlorobenzene (CB), and benzene were used as model pollutants. In the first barrier, that was operated under anaerobic conditions with sucrose and ethanol as auxiliary substrates, TCE was completely converted to lower chlorinated metabolites, predominantly cis-dichloroethene (cis-DCE). The reductive dechlorination process was stable for about 300 d, although the concomitant sulphate-reducing and methanogenic processes varied considerably. In the second barrier, that was operated with addition of hydrogen peroxide and nitrate, dechlorination was limited by a lack of oxygen and restricted mainly to CB biodegradation. Additional aerobic batch tests revealed that the metabolites of anaerobic TCE dechlorination, i.e. cis-DCE and vinyl chloride, were oxidatively dechlorinated in the presence of suitable auxiliary substrates such as ethene, CB, benzene, or sucrose and ethanol. During periods of low biological activity, elimination of TCE and CB occurred by adsorption in the GAC barriers. The pre-sorbed pollutants were available for subsequent biodegradation resulting in a bioregeneration of the activated carbon barriers.

scholarly journals Formation of environmentally friendly chloroorganic compounds technology by sewage and by-products utilization

2007 ◽  
Vol 9 (3) ◽  
pp. 118-121 ◽  
Author(s):  
Jerzy Myszkowski ◽  
Eugeniusz Milchert ◽  
Waldemar Paździoch ◽  
Robert Pełech
Keyword(s):  
Waste Water ◽  
Activated Carbon ◽  
Vinyl Chloride ◽  
Propylene Oxide ◽  
Environmentally Friendly ◽  
Complete Removal ◽  
Purification Method ◽  
Water Waste ◽  
By Products ◽  
Removal And Recovery

Formation of environmentally friendly chloroorganic compounds technology by sewage and by-products utilization The processes presented in the study enables the separation and disposal of the chloroorganic compounds as by-products from the vinyl chloride plant by using the dichlorethane method and also from the production of propylene oxide by the chlorohydrine method. The integrated purification method of steam stripping and adsorption onto activated carbon allows a complete removal and recovery of the chloroorganic compounds from waste water. Waste distillation fraction is formed during the production of vinyl chloride. 1,1,2-trichloroethane separated from the above fraction, can be processed to vinylidene chloride and further to 1,1,1-trichloroethane. 2,3-Dichloropropene, 2-chloroallyl alcohol, 2-chloroallylamine, 2-chlorothioallyl alcohol or bis(2-chloroallylamine) can be obtained from 1,2,3-trichloropropane. In the propylene oxide plant the waste 1,2-dichloropropane is formed, which can be ammonolysed to 1,2-diaminopropane or used for the production of β-methyltaurine. Other chloroorganic compounds are subjected to chlorinolysis which results in the following compounds: perchloroethylene, tetrachloromethane, hexachloroethane, haxachlorobutadiene and hexachlorobenzene. The substitution of the milk of lime by the soda lye solution during the saponification of chlorohydrine eliminates the formation of the CaCl2 waste.

Carbon-supported copper-organic framework as active catalysts for acetylene hydrochlorination

2021 ◽  
Author(s):  
Yi-Bo Wu ◽  
Yao Ma ◽  
Qingbin Li ◽  
Songtian Li ◽  
Yongjun Han ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Steady State ◽  
Vinyl Chloride ◽  
Transition States ◽  
Chemical Characterization ◽  
Acetylene Hydrochlorination ◽  
Physical Chemical ◽  
Organic Framework

In this work, activated carbon supported Cu-MOF as an acetylene hydrochlorination catalyst for manufacture vinyl chloride. Cu-MOF/AC with 15 wt% Cu-MOF content behaves the initial acetylene conversion of 99.2% and vinyl chloride selectivity of 98.5% at 200°C. By combing steady-state experiments and physical-chemical characterization results (XPS, BET, H2-TPR, C2H2-TPD, XRD and HCl adsorption experiments), Cu-O-C is shown to retard the reduction of Cu2+, improve the reactants adsorption and strengthen the anti-coking ability of Cu-based catalysts. According to the previous studies and the Rideal-Eley mechanism, it is proposed that Cu2+ first adsorbed C2H2 to generate transition states in catalysis acetylene hydrochlorination.

Catalytic Dehydrochlorination of 1,2-Dichloroethane into Vinyl Chloride over Polyacrylonitrile-Based Active Carbon Fiber (PAN-ACF)

1994 ◽  
Vol 23 (2) ◽  
pp. 197-200 ◽  
Author(s):  
Isao Mochida ◽  
Yoshinori Yasumoto ◽  
Yoshiro Watanabe ◽  
Hiroshi Fujitsu ◽  
Yasuhiro Kojima ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Vinyl Chloride ◽  
Active Carbon ◽  
Catalytic Dehydrochlorination
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