Activated carbons with high micropore volume obtained from polyurethane foams for enhanced CO2 adsorption

被引：12

作者：

Cruz Jr, Orlando F. ^{[1
]}

Gomez, Ignacio Campello ^{[2
]}

Rodriguez-Reinoso, Francisco ^{[2
]}

Silvestre-Albero, Joaquin ^{[2
]}

Rambo, Carlos R. ^{[3
]}

Martinez-Escandell, Manuel ^{[2
]}

机构：

[1] Natl Inst Amazonian Res, Lab Microscopy & Nanotechnol, BR-69067375 Manaus, Amazonas, Brazil

[2] Univ Alicante, Dept Quim Inorgan, Lab Mat Avanzados, Apartado 99, E-3080 Alicante, Spain

[3] Univ Fed Santa Catarina, Dept Elect & Elect Engn, Lab Elect Mat, BR-88040900 Florianopolis, SC, Brazil

来源：

CHEMICAL ENGINEERING SCIENCE | 2023年 / 273卷

基金：

欧盟地平线“2020”;

关键词：

Polyurethane foams; Activated carbons; CO2; uptake; KOH activation; Immersion calorimetry; DENSITY-FUNCTIONAL THEORY; CHEMICAL ACTIVATION; KOH ACTIVATION; POROUS CARBONS; NARROW MICROPOROSITY; EFFICIENT CO2; PORE-SIZE; CAPTURE; NITROGEN; NAOH;

D O I：

10.1016/j.ces.2023.118671

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Microporous activated carbons with remarkably high CO2 uptake have been synthesized using polyur-ethane (PU) commercial foams as precursors. The PU samples were pyrolyzed at different temperatures in N2 atmosphere and chemically activated with KOH. Adsorption isotherms at 0 degrees C and 25 degrees C and immer-sion calorimetry were applied to provide a deeper knowledge about the most relevant factors implied in CO2 capture process explaining, hence, the values of adsorption obtained. CO2 adsorption uptakes reached values of 7.4 mmol/g at 0 degrees C, 5.0 mmol/g at 25 degrees C and 2.7 mmol/g at 50 degrees C. The remarkably high values of CO2 uptake are closely related with the BET specific surface area of the carbon foams but also with the high volume of narrow micropores all the samples present a high volume of micropores (be-tween 0.59 and 0.71 cm3/g) as also confirmed by immersion calorimetry.(c) 2023 Elsevier Ltd. All rights reserved.

引用

页数：11

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