Anion Exchange Resin Based Porous Carbon Spheres for the Catalytic 1,2-Dehydrochlorination of Dichloroethane

Abstract

Carbon spheres with hierarchical pore structure were successfully synthesized by using strongly basic anion exchange resins exchanged with silicate, followed by pyrolysis in an inert atmosphere and etching silica. As a result of the quaternary ammonium group in the anion exchange resin structure, these carbon spheres were doped with nitrogen. The performance of these carbon spheres in the catalytic dehydrochlorination of 1,2dichloroethane (EDC) was improved with the increase of calcination temperature, and the carbon sphere 900-900-RC showed the highest conversion rate (96.7%) and a selectivity to vinyl chloride above 99%. The structural and surface properties of N-doped carbon spheres were characterized by scanning electron microscopy, nitrogen sorption, and Raman and X-ray photoelectron spectroscopy. The result of these characterizations further verified that the quaternary nitrogen species are as effective as pyridine nitrogen species in this catalyst.

Effect of Trace Water on the 1,2-Dichloroethane Cracking over Zeolite Catalysts

“…3 Catalytic cracking of EDC to VCM has a high efficiency under relatively mild reaction conditions and is considered the most promising alternative technology to EDC thermal cracking. 2,4,5 Improving the activity and stability of catalysts is the focus of research in this field, but it is also a great challenge. 6 Current EDC cracking catalysts mainly include metal chlorides, 7,8 metal oxides, 9,10 zeolites, 11,12 activated carbons, 6,13−15 and ionic liquids.…”

“…The EDC thermal cracking reaction has a high temperature and low efficiency, which needs to be replaced by a milder and more efficient technology . Catalytic cracking of EDC to VCM has a high efficiency under relatively mild reaction conditions and is considered the most promising alternative technology to EDC thermal cracking. ,, Improving the activity and stability of catalysts is the focus of research in this field, but it is also a great challenge …”

The Journal of Physical Chemistry C Virtual Special Issue on “Energy and Catalysis in China”

“…(1) Energy catalysis: conversion of syngas to higher alcohols on CoMn-modified Cu-based mixed oxides, direct methane conversion to methanol on PdAu nanowires, hydrogenation of CO 2 to ethanol on Na-promoted Rh embedded in S-1 zeolites, oxidative coupling of methane on A +1 Nb 5+ O 3 (A = Li, Na, K) perovskites, and synthesis of jet fuel from glycerol and tert -butyl alcohol on organic solid acid catalysts . (2) Environmental catalysis: catalytic elimination of soot and NO x on Mn-based perovskites, catalytic dehydrochlorination of dichloroethane on porous carbon, oxidation of propane and CO on reducible oxide-supported Pt or PtCu nanocatalysts, , complete oxidation of benzene on Pt SACs, preferential oxidation of CO on Cu x Ce 1– x O 2 nanorods, CO oxidation on Pd/ZnO catalysts or Au–Fe 2 O 3 interfaces, and selective catalytic reduction of nitrogen oxide with methane on Co-exchanged SSZ-13 zeolite catalysts . (3) Synthesis of fine chemicals: selective reduction of nitrobenzene on iron and nitrogen cofunctionalized carbon materials or PtPdCu/Al 2 O 3 , hydrogenation of quinoline and benzoic acid on RhPt/MCM-41, hydroformylation of diisobutene on CoFe alloy catalysts, and selective hydrogenation of cinnamaldehyde to cinnamyl alcohol on Pt@Fe-CeO 2 catalysts or Pt/TiO 2 .…”