PRODUCTION OF BIOCHAR ABSORBENT FROM ANAEROBIC DIGESTATE

摘要

A novel carbon absorption material is described which is formed from anaerobic digestate. The material has a hollow tubular structure and is particularly advantageous in converting hydrogen sulfide in biogas and in absorbing the converted sulfur and sulfur compounds from biogas into its structure. The material after use as a hydrogen sulfide absorbent has value as a horticultural or agricultural product or as a sulfur impregnated activated carbon. The process for producing this novel carbon absorption material is described. In an embodiment, the process described uses in particular, a humidified inert gas over a temperature range of between about 500° C. to 900° C. to convert anaerobic digestate to an active carbon absorbent. The thermal treatment is relatively mild and retains the fibrous structure of the source material while removing cellulosic and hemicellulosic components from the anaerobic digestate.

主权项

1. A method of producing a carbon absorbent material, the method comprising:
providing a quantity of carbon source; heating the quantity of carbon source to at least 400° C., after said heating, activating the carbon source thereby producing activated carbon by directing the activation gas into contact with the quantity of carbon source; and using exhaust gas to fuel heating of carbon source, the exhaust gas being the flow of activation gas after contacting the quantity of carbon source and including volatile hydrocarbons captured from the quantity of carbon source.