Achieving+95% Ammonia Purity by Optimizing the Absorption and Desorption Conditions of Supported Metal Halides
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00355901" target="_blank" >RIV/68407700:21220/22:00355901 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1021/acssuschemeng.1c05668" target="_blank" >https://doi.org/10.1021/acssuschemeng.1c05668</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acssuschemeng.1c05668" target="_blank" >10.1021/acssuschemeng.1c05668</a>
Alternative languages
Result language
angličtina
Original language name
Achieving+95% Ammonia Purity by Optimizing the Absorption and Desorption Conditions of Supported Metal Halides
Original language description
The worldwide push toward the reduction of carbon dioxide emissions has been the main motivation for finding a sustainable alternative to the conventional Haber-Bosch ammonia production process that has a significant carbon footprint. In this work, we focused on ammonia separation by replacing the condenser with an absorber column packed with metal halide solid absorbents. These salts had shown promise in selective separation of NH3 in the past, but more information on the cyclic operation and ammonia desorption conditions was needed. We used an automated apparatus equipped with an absorption column packed with either silica, supported CaCl2, or supported MgCl2 to explore the optimal absorption/ desorption conditions (pressure and temperature swings). Primarily, we are reporting on the working capacity of various sorbents for cyclic ammonia separation. Additionally, we investigated the effect of sweep gas on the desorption efficiency and compared the absorbent performance among each other in terms of absorption working capacity and the purity of the ammonia product stream. We were able to achieve an NH3 stream with a purity of over 95%; in some of the tests, we achieved a coordination number as high as 2.5 mol(NH3)/mol(salt), which is the highest ever reported for a dynamic flow breakthrough test. Our experiments further prove the significant potential that these salts possess to replace phase change condensation in the conventional ammonia synthesis-not only in a greener fashion but also more efficiently with a decreased equipment size, with reduced energy input in smaller scales, and with more flexibility to follow intermittent renewables.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Sustainable Chemistry & Engineering
ISSN
2168-0485
e-ISSN
2168-0485
Volume of the periodical
10
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
204-212
UT code for WoS article
000734272000001
EID of the result in the Scopus database
2-s2.0-85121918824