MAGNETIC ACTIVATED CARBON AND METHODS FOR PREPARING AND REGENERATING SUCH MATERIALS

摘要

A process for preparing magnetic activated carbons including the steps of a) treating an aqueous solution having 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 9 h. The disclosure also relates to magnetic activated carbon prepared according to the process and use of the carbon for separation and storage of gases and purification of liquids. 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 are also disclosed.

主权项

1. A process for preparing magnetic activated carbons comprising the steps of:
a) treating an aqueous solution comprising a biomass hydrothermaily at autogenic pressure at a temperature between 180 and 250° C., under acidic conditions, in the presence of iron ions, to obtain a precursor product, and 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 9 h.