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EP-4735165-A2 - TEMPERATURE-CHANGE ADSORPTION OF CO2

EP4735165A2EP 4735165 A2EP4735165 A2EP 4735165A2EP-4735165-A2

Abstract

The invention relates to sorption material comprising at least one zeolite with at least one alkaline earth metal ion or transition metal ion. The invention also relates to a method for producing the sorption material, a method for carbon dioxide sorption and the use of the sorption material.

Inventors

  • Abdel-Mageed, Ali
  • Wotzka, Alexander
  • Stöhr, Marion
  • WOHLRAB, SEBASTIAN
  • SCHÜTZ, Christine
  • Rüggeberg, Marc
  • MAAS, CHRISTIAN
  • BLOCK, GERALD
  • GROTE, ANDREAS

Assignees

  • Volkswagen Aktiengesellschaft

Dates

Publication Date
20260506
Application Date
20240627

Claims (14)

  1. 1. Sorption material comprising at least one zeolite with at least one alkaline earth metal or transition metal ion.
  2. 2. Sorption material according to claim 1, wherein the alkaline earth metal is selected from the group consisting of calcium, magnesium, barium, berrylium and strontium.
  3. 3. Sorption material according to claim 1, wherein the transition metal ion is zinc.
  4. 4. A process for producing a sorption material according to at least one of claims 1 to 3, comprising the steps: - Preparation of zeolite powder, - Suspending the zeolite powder, and - Mixing the suspension of zeolite powder with an alkaline earth metal salt solution or a transition metal salt solution.
  5. 5. The process of claim 4, wherein the zeolite powder is selected from the group consisting of ZSM-5, 13X zeolite, 5A zeolite, 4A zeolite and 3A zeolite.
  6. 6. The method of claim 4 or claim 5, wherein the alkaline earth metal salt solution is selected from the group consisting of calcium chloride, magnesium chloride, strontium chloride, barium chloride and beryllium chloride.
  7. 7. The process according to at least one of claims 4 to 6, wherein the transition metal salt solution is selected from the group consisting of zinc chloride, platinum chloride, palladium chloride, tin chloride, cobalt chloride, manganese chloride, iron chloride, nickel chloride and copper chloride.
  8. 8. Process according to at least one of claims 4 to 7, wherein the ratio between zeolite powder and alkaline earth metal salt solution or transition metal salt solution is in the range between 1:30.
  9. 9. The method according to at least one of claims 4 to 8, further comprising the step: - Heating the mixture of the suspension of the zeolite powder with the alkaline earth metal salt solution or the transition metal salt solution.
  10. 10. Sorption material produced according to at least one of claims 4 to 9.
  11. 11. Use of a sorption material according to at least one of claims 1 to 3, or 10 for the adsorption of carbon dioxide.
  12. 12. A process for the sorption of carbon dioxide comprising the step: - Adsorption of carbon dioxide by bringing at least one sorption material according to at least one of claims 1 to 3, or 10 into contact with carbon dioxide.
  13. 13. The method of claim 12, further comprising the step: - Desorption of carbon dioxide by heating the at least one sorption material with adsorbed carbon dioxide.
  14. 14. The method according to claim 13, wherein the heating takes place to a temperature >30°C, preferably >50°C, more preferably >80°C.

Description

Description “Low-temperature cycling adsorption of CO2” The invention relates to a sorption material, a process for producing a sorption material, the use of the sorption material and a process for the sorption of carbon dioxide. The emission of carbon dioxide into the atmosphere is currently considered a major driver of climate change. Carbon capture and storage (CCS) technologies are efficient and effective methods for reducing carbon dioxide emissions into the atmosphere. Known methods for capturing carbon dioxide include absorption, adsorption, membrane-based systems, electrochemical separation and cryogenic separation. The absorption of carbon dioxide in an aqueous solvent can be used to purify exhaust gases from power plants and industrial plants. Direct capture of carbon dioxide from the air (DAC) is increasingly seen as an important technology to slow global warming and thereby limit the impacts of climate change (Smith, S. M.; Geden, O.; Nemet, G. F.; Gidden, M. J.; Lamb, W. F.; Powis, C.; Bellamy, R.; Callaghan, M. W.; Cowie, A.; Cox, E.; et al. The State of Carbon Dioxide Removal - 1. Ed.; 2023). This goal can be achieved by developing new materials and energy-efficient concepts for capturing carbon dioxide from the air at minimal energy costs. The sorption of carbon dioxide is usually carried out by suitable sorption materials that can adsorb and desorb carbon dioxide well. However, such sorption materials often have a certain instability to other compounds present in the environment and/or prefer the adsorption of water, for example, to the adsorption of carbon dioxide. Another common problem in the desorption of carbon dioxide from sorption materials is the high temperature required for desorption. This can cause damage to the sorption material and/or require a high energy input. The object of the present invention is to provide a sorption material which at least partially overcomes the above-mentioned disadvantages. Furthermore, it is an object of the present invention to provide a process for producing a sorption material which at least partially overcomes the above-mentioned disadvantages. A further object of the present invention is to provide a process for the sorption of carbon dioxide which at least partially overcomes the above-mentioned disadvantages. This object is achieved by the sorption material according to the invention according to claim 1, the method according to claim 4 and the method according to claim 12. Further advantageous embodiments of the invention emerge from the subclaims and the following description of preferred embodiments of the present invention. A sorption material according to the invention comprises at least one zeolite with at least one alkaline earth metal ion or transition metal ion. The alkaline earth metal ion and the transition metal ion are preferably an ion that replaces the ion originally present. Zeolites with at least one alkaline earth metal ion or transition metal ion are also referred to herein as modified zeolites. Zeolites that do not have an exchanged alkaline earth metal ion or transition metal ion are accordingly referred to herein as unmodified. The approach described here is based on the use of a narrow temperature window for the adsorption and subsequent desorption (separation) of carbon dioxide from the air. Here, H-ZSM-5 zeolite and ion-exchanged H-ZSM-5 are used for measurements at low temperature fluctuations, with adsorption measurements being carried out at 5°C and subsequent desorption in the range between 50°C and 80°C, which is significantly lower than the temperature windows used in the state of the art for the adsorption and desorption of other materials (Hedin, N.; Andersson, L.; Bergstrom, L; Yan, J. Adsorbents for the post-combustion capture of CO2 using rapid temperature swing or vacuum swing adsorption. Applied Energy 2013, 104, 418-433. DOI: 10.1016/j.apenergy.2012.11.034; Mason, YES; Sumida, K.; Mr., ZR; Krishna, R.; Long, JR Evaluating metal-organic frameworks for post-combustion carbon dioxide capture via temperature swing adsorption. Energy & Environmental Science 2011, 4 (8). DOI: 10.1039/c1ee01720a; Ntiamoah, A.; Ling, J.; Xiao, P.; Webley, PA; Zhai, Y. CO2 Capture by Temperature Swing Adsorption: Use of Hot CO2-Rich Gas for Regeneration. Industrial & Engineering Chemistry Research 2016, 55 (3), 703-713. DOI: 10.1021/acs.iecr.5b01384; Raganati, F.; Chirone, R.; Ammendola, P. CO2 Capture by Temperature Swing Adsorption: Working Capacity As Affected by Temperature and CO2 Partial Pressure. Industrial & Engineering Chemistry Research 2020, 59 (8), 3593-3605. DOI: 10.1021/acs.iecr.9b04901). The concept of this approach is based, among other things, on the use of physisorption phenomena of CO2 inside the H-ZSM-5 for CO2, which allows recovery at quite limited temperatures. For desorption, air or other gases such as nitrogen, argon or carbon dioxide can be used as purge gas. A sorption material can be understood as a