(19)
(11)EP 3 653 280 A1

(12)EUROPEAN PATENT APPLICATION

(43)Date of publication:
20.05.2020 Bulletin 2020/21

(21)Application number: 19020455.2

(22)Date of filing:  02.08.2019
(51)Int. Cl.: 
B01D 53/00  (2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30)Priority: 19.11.2018 US 201862769126 P

(71)Applicant: Linde Aktiengesellschaft
80331 München (DE)

(72)Inventors:
  • Krishnamurthy, Krish
    Bridgewater, NJ 08807 (US)
  • Stiller, Christoph
    82256 Fürstenfeldbruck (DE)
  • Gärtner, Lars-Erik
    Bridgewater, NJ 08807 (US)
  • Rupieper, Andreas
    01328 Dresden (DE)

(74)Representative: Imhof, Dietmar 
Linde AG Technology & Innovation Corporate Intellectual Property Dr.-Carl-von-Linde-Straße 6-14
82049 Pullach
82049 Pullach (DE)

  


(54)CAPTURE AND UTILISATION OF CO2 FROM CEMENT PRODUCTION


(57) The present invention is directed to a method and a pathway to capture und use carbon dioxide, which is produced by cement plants.


Description


[0001] The present invention is directed to a method and a pathway to capture and use carbon dioxide.

[0002] In the last decades the focus in the reduction of carbon dioxide (CO2) was, to optimize all processes to avoid the production of carbon dioxide at all or at least to minimize the output of carbon dioxide. So several industrial sectors, where optimized to use renewable fuels, optimize combustion processes or even developed new synthesis routes for products or new catalysts to avoid CO2 emissions.

[0003] But there are processes where it is not possible to avoid the production of carbon dioxide and therefore other solutions have to be developed. The emission of carbon dioxide contributes to the greenhouse effect and climate changes. To increase changes in the industry CO2 emissions are penalized by taxes and bans.

[0004] One example, where the production of CO2 can't be avoided is the production of cement. Therefore, the cement industry needs to think off different solutions to avoid the emission of CO2 into the atmosphere. This situation also applies to other industries such as steel, refining and chemicals, among others.

[0005] Of course, it would be possible to store the captured CO2 in large amount e.g. underground to avoid its emission into the atmosphere. But in most regions of the world carbon capture storage (CCS) is not accepted from the public or there are not enough or not stable enough caverns. Furthermore, it is still unclear what kind of negative effects this long-term storage would have for the environment.

[0006] An object of this invention is to couple different sectors to minimize or avoid the output of CO2 into the atmosphere.

[0007] In the following the term sector is used to describe the different industry fields and energy sources and sinks in an industrial plant and its supply facilities. The cement production is for example one sector, whereas the electrolysis of Water, the synthesis of chemicals or the carbon capture facilities are other sectors.

[0008] There are already several technologies available for capturing CO2 produced by the cement industry during the different manufacturing steps. Some of them are described in WO2015/154174. There are pre- or post-combustion processes available.

[0009] And there are as well steps available to reuse the CO2 in different applications or store it. The potential for carbon capture utilization (CCU) is increasing from year to year. Up till now only small amounts of CO2 are used in the different methods to reuse the CO2.

[0010] Hence, the solution for this task is to combine different synthesis steps and sectors during the cement production to avoid CO2 emissions. For example, it is aimed to capture CO2 from one sector and use it in one or more different sectors.

[0011] This objective is achieved by the method and the pathway according to independent claims. Preferred embodiments are given in the dependent claims, the description and the embodiments.

[0012] By coupling of different carbon capture technologies at a cement plant and use of the captured CO2 the emission of CO2 into the atmosphere can be avoided. Especially if the captured CO2 is used in other sectors that are accessible to the site where the CO2 is captured.

[0013] A pathway was developed for coupling different synthesis steps and sectors for reducing CO2 emissions into atmosphere from cement plants and other sectors that have large point sources of CO2

[0014] As an example, according to the invention the captured CO2 from any one sector including the cement industry can be used for concrete curing in ready-mix plants.

[0015] In another embodiment the captured CO2 can be used for concrete curing in ready-mix plants and for conventional CO2 uses. Conventional uses of CO2 are for example to increase the amount of CO2 in the atmosphere of greenhouse gases or in the food and beverage industry for e.g. carbonation of beverages or freezing of food.

[0016] CO2 can also be used as feedstock for several chemical synthesis steps. Examples are the synthesis of gaseous and liquid fuels, chemical basis materials.

[0017] In a special embodiment of the invention the captured CO2 is used together with hydrogen, which is preferably produced from water electrolysis using renewable power, as chemical basic material for synthesizing chemicals. By using such a method different sectors are coupled. This gives an economical and environmental benefit. One example is the production of methane, which can be used for heating, as fuel or for further synthesis of chemicals.

[0018] Another embodiment couples the production of CO by CO2 electrolysis, for which the captured CO2 is used as feedstock, with the use of CO in various industries. CO is used as raw material for the synthesis of plastics, methanol, dimethyl ether and other basic chemicals. In a preferred embodiment the CO, produced by CO2 electrolysis, for which the captured CO2 is used as feedstock, is additionally used together with hydrogen, which is preferably produced from water electrolysis using renewable power. Therefore, several sectors are coupled in such a way to produce benefits for the environment and the economy.

[0019] The captured CO2 is preferably used close to its production site, so close to the cement production plant, but in other embodiments it is also possible to transport the captured CO2 by pipelines or in transport vessels.

[0020] Preferably the other raw materials as hydrogen or the intermediate products like CO or methane are also produced close to the site, where they should be further used, but it is also possible to transport them by pipelines or in transport vessels.

[0021] There is only a small demand of CO2 in each of the sectors, which are able to further use the captured CO2, but by combining a number of different sectors the amount of used CO2 becomes relevant and can a have positive effect on the global greenhouse effect and other negative consequences on the environment if the CO2 would be emitted to the atmosphere instead. Further, by combining sectors, it is more advantageous to co-locate within short distances the site having the CO2 emissions source and the site where the captured CO2 is utilized. This enables minimizing transportation of the captured CO2 in pipelines or other means such as liquid containers on trucks, and, hence reduce overall costs.

[0022] So especially for cement plants, where only a small amount of the captured CO2 can be directly used for cement curing, the coupling with different sectors brings down the amount of emitted CO2.

[0023] In a further preferred embodiment although the waste heat from the different coupled sectors is used e.g. for the heating of greenhouses. The heat is preferably used directly if the source and the sink are close together, but it can be also transferred by pipelines as steam or other heat transfer media.


Claims

1. A method to reduce the CO2 emission into atmosphere, characterized by coupling of different carbon capture technologies at a cement plant and use of the captured CO2.
 
2. A pathway to couple different synthesis steps and sectors for reducing CO2 emissions into atmosphere from cement plants.
 












REFERENCES CITED IN THE DESCRIPTION



This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Patent documents cited in the description