CATALYTIC ADSORBENTS OBTAINED FROM MUNICIPAL SLUDGES, INDUSTRIAL SLUDGES, COMPOST AND TOBACCO WASTE AND PROCESS FOR THEIR PRODUCTION

摘要

Industrial waste derived adsorbents were obtained by pyrolysis of sewagesludge, metal sludge, waste oil sludge and tobacco waste in some combination.The materials were used as media to remove hydrogen sulfide at roomtemperature in the presence of moisture. The initial and exhausted adsorbentsafter the breakthrough tests were characterized using sorption of nitrogen,thermal analysis, XRD, ICP, and surface pH measurements. Mixing tobacco andsludges result in a strong synergy enhancing the catalytic properties ofadsorbents. During pyrolysis new mineral phases are formed as a result ofsolid state reaction between the components of the sludges. High temperatureof pyrolysis is beneficial for the adsorbents due to the enhanced activationof carbonaceous phase and chemical stabilization of inorganic phase. Samplesobtained at low temperature are sensitive to water, which deactivates theircatalytic centers.