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Ultradeep Removal of Moisture in Gases to Parts-per-Billion Levels: The Exploration of Adsorbents
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology. Zhejiang Univ, Dept Chem, Zheda Rd 38, Hangzhou 310027, Zhejiang, Peoples R China.
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2018 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 122, no 5, p. 2840-2847Article in journal (Refereed) Published
Abstract [en]

Owing to the rigid standards of manufacturing semiconductor components, decrease of the moisture to parts-per-billion (ppb), at a global level, is always vital but extremely nerve-racking in the production of high-purity gases. Herein, typical adsorbents including oxides (SiO2 and gamma-Al2O3), zeolites (4A and NaX), and metal-organic frameworks (MOFs; HKUST-1, UiO-66, and ZIF-8) are investigated with respect to the abilities of ultradeep dewatering from N-2. Compared with other adsorbents, NaX performs much better on both dewatering efficiency (DE, from 2750 to 66 ppb) and the adsorption capacity (AC, 1.55 x 10(4) L N-2.g(-1)). Moreover, it is for the first time experimentally and theoretically proved that the dewatering ability of X zeolite mainly depends on its cation species (Na+, Li+, K+, Cs+, Mg2+, Ca2+, Sr2+, or Ba2+), the forces between the zeolite and H2O, and the number of H2O molecules per cell of the zeolite. CaX thus shows a fascinating DE from 2750 to 33 ppb, a huge AC of 9.08 x 10(4) L N-2.g(-1), and an ideal reusability, compared with results of the scarce contributions reported to date.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 122, no 5, p. 2840-2847
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Chemical Sciences
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URN: urn:nbn:se:kth:diva-223797DOI: 10.1021/acs.jpcc.7b11566ISI: 000424955400043Scopus ID: 2-s2.0-85042154456OAI: oai:DiVA.org:kth-223797DiVA, id: diva2:1188267
Note

QC 20180307

Available from: 2018-03-07 Created: 2018-03-07 Last updated: 2018-03-07Bibliographically approved

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