US 11,939,249 B2
Microwave assisted pyrolysis and gasification
Arild Vik, Blomsterdalen (NO); and Crina Silvia Ilea, Nesttun (NO)
Assigned to Prototech AS, Bergen (NO)
Appl. No. 17/261,620
Filed by Prototech AS, Bergen (NO)
PCT Filed Jul. 19, 2019, PCT No. PCT/NO2019/050154
§ 371(c)(1), (2) Date Jan. 20, 2021,
PCT Pub. No. WO2020/017979, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 20181008 (NO), filed on Jul. 20, 2018.
Prior Publication US 2021/0261453 A1, Aug. 26, 2021
Int. Cl. C02F 11/10 (2006.01); C02F 9/00 (2023.01); C02F 11/04 (2006.01); C02F 11/12 (2019.01); C02F 11/13 (2019.01); C02F 11/18 (2006.01); C02F 103/20 (2006.01); C10J 3/06 (2006.01); F23G 5/027 (2006.01); H01M 8/0612 (2016.01); H01M 8/12 (2016.01)
CPC C02F 11/10 (2013.01) [C02F 9/00 (2013.01); C10J 3/06 (2013.01); F23G 5/027 (2013.01); H01M 8/0618 (2013.01); C02F 11/04 (2013.01); C02F 11/12 (2013.01); C02F 11/13 (2019.01); C02F 11/18 (2013.01); C02F 2103/20 (2013.01); C10J 2300/0923 (2013.01); C10J 2300/123 (2013.01); C10J 2300/1646 (2013.01); F23G 2200/00 (2013.01); F23G 2201/30 (2013.01); F23G 2209/12 (2013.01); H01M 2008/1293 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for continuous large scale converting an aqueous salt containing sludge from a marine fish farm into gases and a solid residue, comprising the steps of:
dewatering the aqueous salt containing sludge to a water content of 20-60% (weight/weight);
heating the dewatered sludge to a temperature of 500° C. to 700° C. by microwave radiation, thereby generating heat and steam;
partially or completely pyrolyzing the heated dewatered sludge to produce pyrolysis products, wherein the pyrolysis products comprise CO gas, CH4 gas and H2 gas, CHO oil and solid C;
gasifying the pyrolysis products, wherein the solid C, H2 gas and CHO oil are gasified to CO gas and H2 gas, wherein
the steps of pyrolysis and gasification takes place simultaneously in one reactor, and
the microwave radiation generates the steam for the gasification reaction by heating the water in the salt containing aqueous sludge.