Influence of the chemical composition of the catalyst on the dehydrochlorination of 1,2-dichloroethane

Czarny, Zdzislaw; Oszczudłowski, Jerzy

doi:10.1007/bf02064400

Cited by 1 publication

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“…It has been firstly reported that BaCl 2 /AC can catalyze the dehydrochlorination of 2,3-dichlorobutane to 2-chlorobutene at 215–235 °C, but it gets deactivated in few hours . Subsequently, CuCl 3 , CaCl 2 , LaCl 3 , and other metal chlorides supported on AC have also been extensively explored as dehydrochlorination catalysts. − Other acidic and basic catalysts, such as Al 2 O 3 , silica–alumina, ZSM-5, SAPO, polyacrylonitrile-based activated carbon fibers, and so on, have been applied in the reaction, ,− too. Moreover, phosphonium chloride ionic liquid medium has also been used as both a solvent and catalyst to the reaction in a bubbling tank reactor …”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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The pyrolysis of 1,2-dichloroethane (EDC) is the most popular commercialized way of producing vinyl chloride monomers (VCM); however, it is plagued by high-energy consumption and the resulting coke formation. Here, a series of nitrogen-doped (N-doped) activated carbon catalysts (N-AC) were prepared conveniently for EDC dehydrochlorination. The structural and textural properties of N-doped catalysts were characterized by X-ray diffraction, transmission electron microscopy, Raman spectra, temperature-programmed desorption of VCM and EDC, and X-ray photoelectron spectroscopy. The results revealed that doping N into activated carbon supports introduced basicity sites and caused partial graphitization on the catalyst surfaces. Thus, an improved absorption capacity to EDC and VCM and an accelerated desorption rate were obtained, which greatly enhanced EDC conversion and VCM selectivity. EDC was almost completely dehydrochlorided into vinyl chloride at a temperature of 300 °C and an EDC liquid hourly space velocity of 0.313 h –1 . The high catalytic activity and selectivity as well as good stability suggested that the N-AC catalyst would be a promising dehydrochlorination catalyst on an industrial scale.

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