EURO-ECO 2011

Hanover

21 - 22 November 2011

Environmental, Engineering - Economic and Legal Aspects for Sustainable Living

European Academy of Natural Sciences, Hanover

European Scientific Society, Hanover

University of Bremen, Bremen

Home

Abstracts EURO-ECO

Contact

Disclaimer
I.V. Mishakov
Yu.I. Bauman
D.V. Korneev
A.A. Vedyagin
R.A. Buyanov		 CATALYTIC PROCESSING OF ORGANOCHLORINE WASTES INTO HIGH SURFACE AREA CARBON NANOFIBERS
Boreskov Institute of catalysis SB RAS, Novosibirsk, Russia;
E-mail: mishakov@catalysis.ru
Novosibirsk State Technical University, Novosibirsk, Russia

Russian industry of the chlorine chemistry has accumulated over 1.5 million tons of extremely dangerous chloroorganic wastes left without being engaged into recycling process. The recycling of such wastes is considered to be rather challenge and important ecologic task/ Catalytic pyrolysis of chlorinated hydrocarbons (Cl-HC) over nickel catalysts is considered to be an effective approach for abatement of such wastes. It was early shown that the decomposition of Cl-HCs results in formation of so-called “feathery” carbon nanofibers (CNF) characterized by the very defective structure and high surface area (300-400 m2/g)]. Here we present the proposed method for decomposition over supported and bulk nickel-containing catalysts.

Decomposition of individual Cl-HC (1,2-dichloroethane, DCE) and their mixes (real wastes) was carried out in a flow quartz reactor equipped with McBain balances at 500-600°C. Ni foil and Ni-Cr wire (80 wt.% Ni, 20 wt.% Cr) were used as bulk catalysts. It was found that decomposition of DCE on bulk Ni catalysts appears more intensively than in case of common Ni supported ones. It was also established that the rate of CNF growth on bulk catalysts is more than one order of magnitude higher than that corresponding to conventional supported catalysts.

It has been then revealed that the exposure of bulk nickel-containing alloy results in rather fast and profound reconstruction of surface. This process is believed to be driven by so-called “carbon erosion” which ends up with formation of separated self-operated active particles The developed approach has been recently tested on real wastes. It was confirmed that 1 kg of bulk Ni is able to convert about 1000 kg of wastes into 200 kg of nano-structured carbon fibers. The mechanism of CNF formation during the decomposition process will be discussed in details.

This study was carried out in the framework of Scientific Educational Centre “Catalysis” and financially supported by the President’s grant #MK-3711.2011.3.


Download Pesentation (pdf, 4,1 MB)

 

ON-BOARD CONVERTER FOR EXHAUST GASES OF GASOLLINE ENGINES List of abstracts ECOLOGICAL ADVANTAGES OF HIGH PURITY SILICON CARBONTHERMAL PRODUCTION