Composite Sorbents Based on Carbon Nanotubes and K2CO3 for CO2 Capture from Ambient Air

被引：0

作者：

Derevschikov, V. S. ^{[1
]}

Kuznetsov, V. L. ^{[1
]}

Veselovskaya, J. V. ^{[1
]}

Moseenkov, S. I. ^{[1
]}

Yatsenko, D. A. ^{[1
,2
]}

Suknev, A. P. ^{[1
]}

Leonova, A. A. ^{[1
]}

Makolkin, N. V. ^{[1
]}

Ruvinskiy, P. S. ^{[1
]}

机构：

[1] Boreskov Inst Catalysis SB RAS, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2023年 / 62卷 / 47期

关键词：

SELF-REACTIVATION; ADSORPTION; POTASSIUM; OXIDATION;

D O I：

10.1021/acs.iecr.3c02055

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

K2CO3-containing sorbents supported on carbon nanotubes (CNT) were prepared via one-pot extrusion molding and heat treatment. The porous CNTs were mixed with a water-isopropyl alcohol solution of potassium acetate (CH3COOK) and extruded by a plunger extruder. After drying in air, extrudates were calcined at 500 degrees C in argon to obtain the sorbents with a K2CO3 weight content in a range of 13.1-44.8 wt %. Samples were characterized using various techniques (scanning electron microscopy (SEM), X-ray diffraction (XRD), and low-temperature nitrogen adsorption) and were tested in the process of carbon dioxide capture from ambient air. The sorbent with 44.8 wt % K2CO3 demonstrated the promising dynamic CO2-sorption capacity (up to 8.9 wt %) under temperature-swing adsorption (TSA) cycle conditions. Taking into account that the sorbents need a relatively low temperature for regeneration (150 degrees C) while demonstrating high CO2-sorption capacity in the sequence of TSA cycles, these sorbents may be of interest for direct air capture applications.

引用

页码：20340 / 20351

页数：12

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