TY - JOUR

T1 - Conditions of the Formation and Properties of an Adsorbent Obtained from Aluminum Oxide Modified with Polyimide

AU - Yakovleva, E. Yu

AU - Baranovskaya, E. E.

N1 - Funding Information: This work was performed as part of a State Task for the Boreskov Institute of Catalysis. It was supported by the RF Ministry of Science and Higher Education, project no. AAAA-A2 1-121011390007-7. Publisher Copyright: © 2021, Pleiades Publishing, Ltd.

PY - 2021/8

Y1 - 2021/8

N2 - The change in textural and chromatographic properties of separation layers obtained from aluminum oxide modified with polyimide is studied via low-temperature nitrogen adsorption, high-resolution transmission electron microscopy, and gas chromatography. The specific surface of γ-Al2O3 adsorbent + 10 wt % polyimide falls from 228.9 to 190.4 m2/g with a slight increase in pore size from 83.6 to 86.5 Å upon thermal aging at 250 to 450°C in an inert gas flow. The uniform arrangement of carbon on the surface layers and almost Gaussian shape of the peaks of the components separated indicate a homogeneous adsorbent surface forms. This is achieved after removing active sites of sodium, iron, and titanium in the initial γ-Al2O3, modifying its surface with polyimide, and thermal aging at 450°C. Carbon monoxide and carbon dioxide are selectively eluted from the associated permanent gases and hydrocarbons.

AB - The change in textural and chromatographic properties of separation layers obtained from aluminum oxide modified with polyimide is studied via low-temperature nitrogen adsorption, high-resolution transmission electron microscopy, and gas chromatography. The specific surface of γ-Al2O3 adsorbent + 10 wt % polyimide falls from 228.9 to 190.4 m2/g with a slight increase in pore size from 83.6 to 86.5 Å upon thermal aging at 250 to 450°C in an inert gas flow. The uniform arrangement of carbon on the surface layers and almost Gaussian shape of the peaks of the components separated indicate a homogeneous adsorbent surface forms. This is achieved after removing active sites of sodium, iron, and titanium in the initial γ-Al2O3, modifying its surface with polyimide, and thermal aging at 450°C. Carbon monoxide and carbon dioxide are selectively eluted from the associated permanent gases and hydrocarbons.

KW - aluminum oxide

KW - fluorinated polyimide

KW - gas chromatography

KW - hydrocarbons

KW - permanent gases

UR - http://www.scopus.com/inward/record.url?scp=85113711131&partnerID=8YFLogxK

U2 - 10.1134/S0036024421080306

DO - 10.1134/S0036024421080306

M3 - Article

AN - SCOPUS:85113711131

VL - 95

SP - 1705

EP - 1711

JO - Russian Journal of Physical Chemistry A

JF - Russian Journal of Physical Chemistry A

SN - 0036-0244

IS - 8

ER -