Evaluation of the potential of a 3D-printed hybrid zeolite 13X/activated carbon material for CO2/N-2 separation using electric swing adsorption

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Ana M. Ribeiro (Author) FEUP; Regufe, MJ (Author) Other; Pereira, A (Author) Other; Alexandre Ferreira (Author) FEUP; Rodrigues, A (Author) Other

Journal

Title: Chemical Engineering Journal

Vol. 450

ISSN: 1385-8947

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Associated Projects

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00X-0TX

DOI: 10.1016/j.cej.2022.138197

Abstract (EN): Zeolite 13X is known for its higher CO2 adsorption capacity. The use of monolithic shaped materials allows a process with a lower pressure drop than traditionally packed beds, increasing the energy efficiency of the process. Additive manufacturing is an alternative for developing hierarchically structured adsorbent materials with improved geometries. In this study, the potential of a hybrid monolith with electrically conductive properties was assessed for CO(2 )capture by applying an Electrical Swing Adsorption process. The monolith was obtained by direct ink writing. In addition to the zeolite 13X (47.5 %wt.), activated carbon (47.5 %wt.) was used to provide electrical conductivity to the material. Carboxymethylcellulose was used as a binder/plasticizer to assist in writing and provide mechanical stability. The properties of the monolith were analyzed by several techniques and were compared with its raw adsorbent materials. CO(2 )and N(2 )adsorption equilibrium properties and the adsorption dynamics were also evaluated to test the performance of the monolith in capturing CO2. During these tests, electrification to regenerate the structured adsorbent was used. Considering a stream with a molar fraction of 0.15 of CO2 and 0.85 of N-2 at 1 bar, the monolith presents a CO2 /N(2 )selectivity of 30.7. The application of electric current increased the monolith temperature due to the Joule heating effect and demonstrated the efficiency in achieving a faster regeneration of the adsorbent. The cyclic stability of the monolith was also evaluated in this work. This study proves the potential of using direct ink writing to produce structured adsorbent materials for CO(2 )capture using an electric swing adsorption process.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17