MAGNETIC ACTIVATED CARBON AND METHODS FOR PREPARING AND REGENERATING SUCH MATERIALS

摘要

The present invention relates to process for preparing magnetic activated carbons comprising the steps of a) treating an aqueous solution comprising a biomass hydrothermally at autogenic pressure at a temperature 180 and 250 °C under acidic conditions in the presence of iron ions to obtain a precursor product b) activating the precursor product obtained in step a) by mixing an activating agent at elevated temperatures between 550 and 850 °C for a period up to 9h. The invention also relates to magnetic activated carbon prepared according to said process and use of the carbon for separation and storage of gases and purification of liquids. Further the invention relates to a method for separation of particles from a liquid and/or a gas and method for regenerating magnetic activated carbon by heating using an oscillating electromagnetic field.