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1 VUT v Brně Fakulta chemická Ústav fyzikální a spotřební chemie Miroslav KALOČ 2 2 VŠB-TU Ostrava Fakulta metalurgie a materiálového inženýrství Katedra chemie Martina KLUČÁKOVÁ 1 Miloslav PEKAŘ 1
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thermal power plant in Hodonín last mine working Mikulčice near Hodonín combustion heat: 10 - 12 000 kJ/kg heating value: ~ 8 000 kJ/kg LIGNITE AT PRESENT ( Czech Republic) low quality fuel
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coal + biomass surface activity high content of humic substances valuable chemical raw material ESSENCE: LIGNITE IN THE FUTURE?
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direct use OR chemical or physical treatment for instance: sorbent plant production supporting agent source of humic substances LIGNITE IN THE FUTURE?
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in natural state lignite - SORBENT Maximum adsorbed amounts in mol/g Al 3+ Cd 2+ Cr 3+ Cu 2+ Fe 2+ Pb 2+ Zn 2+ lignite coal Merck 3.57 10 -4 2.18 10 -4 2.26 10 -4 1.45 10 -3 4.79 10 -4 1.64 10 -4 1.44 10 -4 3.70 10 -5 1.42 10 -3 2.35 10 -4 4.79 10 -4 7.50 10 -5 ––
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Sample 650/1 650/2 750/1 750/2 RBK after carbonization lignite - SORBENT Toluene breakthrough times for various sorbents Relative breakthrough time in % 58 69 30 109 100
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relative % yield Fertilizer * Carrots Maize Vetch NPK 100 100 100 lignite 1 106 115 107 lignite 2 111 103 104 lignite 3 115 119 117 * Lignite fertilizer dosage grows with growing number lignite & AGRICULTURE Relative yields from pot tests
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field tests - wheat lignite & AGRICULTURE
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natural state: 20-30% after oxidation in suspension: up to ~ 60% sorption and complexation kinetics and equilibria transport and chemical processes in humic gels fractionation and characterization of humic acids thermooxidative stability preparation of organic-mineral complexes lignite & HUMIC ACIDS
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BURN LIGNITE OR CLOSE MINES OR MAKE EFFICIENT AND INTELLIGENT USE OF ONE OF OUR FEW RAW MATERIALS WHAT TO DO...? CONCLUSION
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