Regenerative Energie

Biogas

Biomasse

Erneuerbare allgemein

Energieeinsparung

Erdwärme

Grünes Geld

Klimaschutz

Kraft-Wärme-Kopplung

Meeresenergie

Mobilität

Photovoltaik

Solarthermie

Wärmepumpen

Wasserkraft

Windenergie

content-Partner

LEACHING BEHAVIOUR AND CO2 SEQUESTRATION CAPACITY OF ACCELERATED CARBONATED MSWI APC RESIDUES

Climate change control and sustainable management of natural resources and waste are two of the four priority fields of intervention approved during the U.N. World Summit on sustainable development held in Johannesburg in 2002, which has set the legislative guidelines for European environmental policies until 2012. Concerning the reduction of greenhouse gas emissions, CO2 capture and storage (CCS) technologies have been indicated as one of the most viable and effective measures to be applied in the short term, at least until energy production will still rely on fossil fuels combustion (IPCC, 2005). One of the CCS techniques presently investigated mimics natural rock weathering processes by which CO2 is stored as thermodynamically stable carbonates by carbonation of Ca and Mg silicate minerals (wollastonite, serpentine and olivine).

This paper presents the results of accelerated carbonation batch experiments on air pollution control (APC) residues from waste incineration. An extended characterization of the residues prior and after the treatment was carried out to assess the amount of CO2-reactive species in the ash and the effects of carbonation on ash mineralogy and microstructure. Aqueous carbonation experiments were carried out using 100% CO2 and varying the main operational parameters: temperature, pressure and liquid-to-solid (L/S) ratio, to assess their influence on process kinetics and CO2 uptake. Maximum Ca conversion to carbonate of 67% was achieved. The effects of carbonation on leaching were: a significant decrease in mobility for Pb, Zn and Cu at high pH values, an insignificant change or mobilization for Cr and Sb, and no major changes for soluble salts.

Copyright:	© IWWG International Waste Working Group
Quelle:	Specialized Session D (Oktober 2007)
Seiten:	10
Preis:	€ 0,00
Autor:	Prof. ing. Renato Baciocchi Giulia Costa Elisabetta Di Bartolomeo Enrico Traversa A. Polettini
	Artikel nach Login kostenfrei anzeigen
	Artikel weiterempfehlen
	Artikel nach Login kommentieren

---