Siloxane adsorption on activated carbons: Role of the surface chemistry on sorption properties in humid atmosphere and regenerability issues
Само за регистроване кориснике
2019
Аутори
Vu Tung Lam TranGelin, Patrick
Ferronato, Corinne
Mascunan, Pascale
Rac, Vladislav
Chovelon, Jean-Marc
Postole, Georgeta
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Commercial activated carbons (ACs) have been studied in dynamic adsorption of octamethylcyclotetrasiloxane (D4) in both dry and wet conditions. 1000 ppm (v/ v) D4 with N-2 as carrier gas and relative humidity (RH) up to 70% were used. Samples were characterized by physicochemical techniques such as N-2 and H2O adsorption/desorption at -196 and 20 degrees C, respectively, XPS, Boehm titration, chemical and elemental analysis, thermogravimetric measurements. No correlation between adsorption capacity in dry conditions and textural properties could be established. In wet conditions, the presence of hydrophilic sites preferentially adsorbing H2O strongly decreases the ability of ACs to adsorb D4. The regenerability by thermal treatment after D4 adsorption in dry conditions was also addressed and followed by gas chromatography and in situ DRIFTS. The D4 polymerization into polysiloxanolate/PDMS was found to proceed on ACs containing alkali metals (K, Na) as revealed by the observed release ...of their decomposition products during the thermodesorption treatment. This property is detrimental to the regenerability of the AC by blockage of its porosity. The eventual formation of polysiloxanalolate type species during the adsorption could also be responsible for limiting the D4 uptake by partial blockage of the AC porosity.
Кључне речи:
D4 adsorption / Activated carbon / Competitive adsorption with humidity / Surface chemistry / Biogas purificationИзвор:
Chemical Engineering Journal, 2019, 371, 821-832Издавач:
- Elsevier Science Sa, Lausanne
Финансирање / пројекти:
- French Ministry of Higher Education and Research
DOI: 10.1016/j.cej.2019.04.087
ISSN: 1385-8947
WoS: 000467042200085
Scopus: 2-s2.0-85064388463
Институција/група
Poljoprivredni fakultetTY - JOUR AU - Vu Tung Lam Tran AU - Gelin, Patrick AU - Ferronato, Corinne AU - Mascunan, Pascale AU - Rac, Vladislav AU - Chovelon, Jean-Marc AU - Postole, Georgeta PY - 2019 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/5059 AB - Commercial activated carbons (ACs) have been studied in dynamic adsorption of octamethylcyclotetrasiloxane (D4) in both dry and wet conditions. 1000 ppm (v/ v) D4 with N-2 as carrier gas and relative humidity (RH) up to 70% were used. Samples were characterized by physicochemical techniques such as N-2 and H2O adsorption/desorption at -196 and 20 degrees C, respectively, XPS, Boehm titration, chemical and elemental analysis, thermogravimetric measurements. No correlation between adsorption capacity in dry conditions and textural properties could be established. In wet conditions, the presence of hydrophilic sites preferentially adsorbing H2O strongly decreases the ability of ACs to adsorb D4. The regenerability by thermal treatment after D4 adsorption in dry conditions was also addressed and followed by gas chromatography and in situ DRIFTS. The D4 polymerization into polysiloxanolate/PDMS was found to proceed on ACs containing alkali metals (K, Na) as revealed by the observed release of their decomposition products during the thermodesorption treatment. This property is detrimental to the regenerability of the AC by blockage of its porosity. The eventual formation of polysiloxanalolate type species during the adsorption could also be responsible for limiting the D4 uptake by partial blockage of the AC porosity. PB - Elsevier Science Sa, Lausanne T2 - Chemical Engineering Journal T1 - Siloxane adsorption on activated carbons: Role of the surface chemistry on sorption properties in humid atmosphere and regenerability issues EP - 832 SP - 821 VL - 371 DO - 10.1016/j.cej.2019.04.087 ER -
@article{ author = "Vu Tung Lam Tran and Gelin, Patrick and Ferronato, Corinne and Mascunan, Pascale and Rac, Vladislav and Chovelon, Jean-Marc and Postole, Georgeta", year = "2019", abstract = "Commercial activated carbons (ACs) have been studied in dynamic adsorption of octamethylcyclotetrasiloxane (D4) in both dry and wet conditions. 1000 ppm (v/ v) D4 with N-2 as carrier gas and relative humidity (RH) up to 70% were used. Samples were characterized by physicochemical techniques such as N-2 and H2O adsorption/desorption at -196 and 20 degrees C, respectively, XPS, Boehm titration, chemical and elemental analysis, thermogravimetric measurements. No correlation between adsorption capacity in dry conditions and textural properties could be established. In wet conditions, the presence of hydrophilic sites preferentially adsorbing H2O strongly decreases the ability of ACs to adsorb D4. The regenerability by thermal treatment after D4 adsorption in dry conditions was also addressed and followed by gas chromatography and in situ DRIFTS. The D4 polymerization into polysiloxanolate/PDMS was found to proceed on ACs containing alkali metals (K, Na) as revealed by the observed release of their decomposition products during the thermodesorption treatment. This property is detrimental to the regenerability of the AC by blockage of its porosity. The eventual formation of polysiloxanalolate type species during the adsorption could also be responsible for limiting the D4 uptake by partial blockage of the AC porosity.", publisher = "Elsevier Science Sa, Lausanne", journal = "Chemical Engineering Journal", title = "Siloxane adsorption on activated carbons: Role of the surface chemistry on sorption properties in humid atmosphere and regenerability issues", pages = "832-821", volume = "371", doi = "10.1016/j.cej.2019.04.087" }
Vu Tung Lam Tran, Gelin, P., Ferronato, C., Mascunan, P., Rac, V., Chovelon, J.,& Postole, G.. (2019). Siloxane adsorption on activated carbons: Role of the surface chemistry on sorption properties in humid atmosphere and regenerability issues. in Chemical Engineering Journal Elsevier Science Sa, Lausanne., 371, 821-832. https://doi.org/10.1016/j.cej.2019.04.087
Vu Tung Lam Tran, Gelin P, Ferronato C, Mascunan P, Rac V, Chovelon J, Postole G. Siloxane adsorption on activated carbons: Role of the surface chemistry on sorption properties in humid atmosphere and regenerability issues. in Chemical Engineering Journal. 2019;371:821-832. doi:10.1016/j.cej.2019.04.087 .
Vu Tung Lam Tran, Gelin, Patrick, Ferronato, Corinne, Mascunan, Pascale, Rac, Vladislav, Chovelon, Jean-Marc, Postole, Georgeta, "Siloxane adsorption on activated carbons: Role of the surface chemistry on sorption properties in humid atmosphere and regenerability issues" in Chemical Engineering Journal, 371 (2019):821-832, https://doi.org/10.1016/j.cej.2019.04.087 . .