Sorption of carbon dioxide by the composite sorbent of potassium carbonate in porous matrix

被引：36

作者：

Okunev, AG ^{[1
]}

Sharonov, VE ^{[1
]}

Gubar, AV ^{[1
]}

Danilova, IG ^{[1
]}

Paukshtis, EA ^{[1
]}

Moroz, EM ^{[1
]}

Kriger, TA ^{[1
]}

Malakhov, VV ^{[1
]}

Aristov, YI ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, GK Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

RUSSIAN CHEMICAL BULLETIN | 2003年 / 52卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

composite sorbent; chemisorption; carbon dioxide; potassium carbonate; IR spectroscopy in situ;

D O I：

10.1023/A:1023450614383

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Sorption of CO2 in the presence of water vapor by the K2CO3-gamma-Al2O3 composite sorbent was studied by IR spectroscopy in situ, X-ray diffraction analysis, and the differentiating dissolution method and reasons for a decrease in its dynamic capacity are given. The samples containing K(2)CO(3)(.)1.5H(2)O in pores are characterized by the maximal dynamic capacity. A mechanism for CO2 sorption was proposed, which qualitatively explains the obtained dependence of the capacity on the water content in the composite sorbent. A high dynamic capacity can be maintained by regeneration of the sorbents by water vapor at 170 degreesC. The capacity of the sorbents decreases during the first 10 sorption-regeneration cycles due to the formation of an inactive phase of potassium aluminum carbonate.

引用

页码：359 / 363

页数：5

共 20 条

[1]

ANAND M, 1996, P 1996 US DOE HYDR P, V1, P537

[2] Characterization of potassium carbonate supported on porous materials and the application to the recovery of carbon dioxide from flue gases under moist conditions [J].

Hayashi, H ;

Hirano, S ;

Shigemoto, N ;

Yamada, S .

NIPPON KAGAKU KAISHI, 1995, (12) :1006-1012

[3] Efficient recovery of carbon dioxide from flue gases of coal-fired power plants by cyclic fixed-bed operations over K2CO3-on-carbon [J].

Hayashi, H ;

Taniuchi, J ;

Furuyashiki, N ;

Sugiyama, S ;

Hirano, S ;

Shigemoto, N ;

Nonaka, T .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1998, 37 (01) :185-191

[4] CYCLIC FIXED-BED OPERATIONS OVER K2CO3-ON-CARBON FOR THE RECOVERY OF CARBON-DIOXIDE UNDER MOIST CONDITIONS [J].

HIRANO, S ;

SHIGEMOTO, N ;

YAMADA, S ;

HAYASHI, H .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1995, 68 (03) :1030-1035

[5] Sorption-enhanced reaction process for hydrogen production [J].

Hufton, JR ;

Mayorga, S ;

Sircar, S .

AICHE JOURNAL, 1999, 45 (02) :248-256

[6]

Keltsev N.V., 1984, Foundations of Adsorption Equipment

[7] In situ X-ray diffraction of catalysts.: Phase transformations of Cu/Cr-Oxides with different initial structure under redox conditions [J].

Krieger, TA ;

Plyasova, LM ;

Yurieva, TM .

EUROPEAN POWDER DIFFRACTION, PTS 1 AND 2, 2000, 321-3 :386-391

[8]

Makatun V. N., 1972, RUSS CHEM REV, V41, P905

[9]

MALAKHOV VV, 1995, KINET KATAL, V36, P503

[10] Sorption of carbon dioxide from wet gases by K2CO3-in-porous matrix:: Influence of the matrix nature [J].

Okunev, AG ;

Sharonov, VE ;

Aristov, YI ;

Parmon, VN .

REACTION KINETICS AND CATALYSIS LETTERS, 2000, 71 (02) :355-362

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