PRODUCTION CHARACTERIZATION AND ADSORPTIVE CAPACITY OF ACTIVATED CARBONS FROM GREEK LIGNITE
Abstract
THE OBJECTIVES OF THIS WORK WERE TO EXAMINE THE EFFECT OF MINERAL MATTER ON THEPORE STRUCTURE DEVELOPMENT AND THE REACTION RATE DURING THE PRODUCTION OF ACTIVATED CARBONS, TO INVESTIGATE THE RELATIONSHIP BETWEEN THE PHYSICO-CHEMICAL PROPERTIES OF ACTIVATED CARBONS AND THEIR ADSORPTION CAPACITY AND TO DEVELOP A MATHEMATICAL MODEL THAT DESCRIBES ADSORPTION ON ACTIVATED CARBON COLUMNS. ACTIVATED CARBONS PRODUCED FROM GREEK LIGNITE WITH A HIGH MINERAL MATTER CONTENT UNDER VARIOUS EXPERIMENTAL CONDITIONS USING CO2 AS OXIDING AGENT. REMOVAL OF INORGANIC IMPURITIES WAS ACCOMPLISHED BY ACID WASHING OF RAW LIGNITE WITH DIFFERENT ACID SOLUTIONS. ACTIVATED CARBONS WERE ALSO PRODUCED FROM ACID TREATED LIGNITE WITH DIFFERENT ASH CONTENT. FOR THE CHARACTERIZATION OF ACTIVATED CARBONS ADSOPTION OF N2 AT 77 K AND CO2 AT 298K WAS USED. REMOVAL OF INORGANIC IMPURITIES BROUGHT ABOUT A LOWERING IN REACTIVITY AND AN INCREASE IN THE MICROPORE SURFACE AREA OF ACTIVATED CARBONS. ADSORTION STUDIES WERE PERFOR ...
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