公开(公告)号：US20240018039A1

公开(公告)日：2024-01-18

申请号：US18256349

申请日：2021-12-15

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Beat STOFFEL ,  Ernst BUCHER ,  Karl-Heinz BOES ,  Mirko WEBER

IPC: C04B7/46 ,  C04B7/43 ,  C04B7/47

CPC classification number: C04B7/46 ,  C04B7/432 ,  C04B7/475

Abstract: A method of calcining a raw material to obtain a cementitious material, includes providing a flow of raw material containing a metal carbonate, such as CaCO3 to a calcination system, introducing the flow of raw material into a first thermal reactor and at least partially decarbonating the raw material in the first thermal reactor by subjecting the raw material to a first heat treatment at a first temperature of at least 650° C. in order to obtain an at least partly decarbonated material and CO2, wherein the first thermal reactor is heated by electrical energy, and obtaining the cementitious material as a result of the first heat treatment.

公开(公告)号：US20220411707A1

公开(公告)日：2022-12-29

申请号：US17778683

申请日：2020-12-18

Applicant: HOLCIM TECHNOLOGY LTD

Inventor： Karl-Heinz BOES ,  Mirko WEBER ,  Beat STOFFEL

IPC: C10L3/08 ,  C04B7/36 ,  C10G2/00

Abstract: A method of processing exhaust gas containing CO2, such as exhaust gas from a cement production plant, includes burning fuel in the combustion reactor with the O2 content of the exhaust gas being used as an oxidizing agent, controlling the combustion in the combustion reactor so that the exhaust gas from the combustion reactor contains less than 10 vol.-% of oxygen and at least 80 vol.-% of a mixture of CO and CO2, and feeding the exhaust gas from the combustion reactor into a conversion reactor, in which the CO2 and optionally the CO contained in the exhaust gas is converted into a hydrocarbon fuel.