The effect of heating temperature and nitric acid treatments on the performance of Cu- and Zn-based broad spectrum respirator carbons

被引：18

作者：

Smith, J. W. H. ^{[1
]}

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

Dahn, T. R. ^{[1
]}

Dunphy, K. ^{[1
]}

Sullivan, B. ^{[1
]}

Mallay, M. ^{[1
]}

Croll, L. M. ^{[2
]}

Reynolds, J. H. ^{[2
]}

Andress, C. ^{[2
]}

Dahn, J. R. ^{[1
,3
]}

机构：

[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

[2] 3M Canada Co, Brockville, ON K6V 5V8, Canada

[3] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, Canada

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2011年 / 364卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Impregnated activated carbon; Impregnant grain size; Nitric acid treatment; Thermal decomposition; Gas adsorption capacity; IMPREGNATED ACTIVATED CARBONS; ADSORPTION CAPACITIES; SO2; ADSORPTION; COPPER; AMMONIA; REMOVAL; SURFACE; OXIDATION; NITROGEN; SORPTION;

D O I：

10.1016/j.jcis.2011.08.031

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Impregnated activated carbons (IACs) that are used in broad spectrum gas mask applications have historically contained copper and/or zinc impregnants. The addition of an oxidizing agent, such as nitric acid (HNO(3)) can be useful in distributing the metallic impregnants uniformly on the activated carbon substrate. In this work, we study IACs prepared from copper nitrate (Cu(NO(3))(2)) and zinc nitrate (Zn(NO(3))(2)) Precursors as a function of HNO(3) content present in the impregnating solution and as a function of heating temperature. The gas adsorption capacity of the IACs was determined by dynamic flow testing using sulfur dioxide (SO(2)), ammonia (NH(3)), hydrogen cyanide (HCN) and cyclohexane (C(6)H(12)) challenge gases under dry and humid conditions. The thermal decomposition and distribution of the impregnant on the activated carbon substrate is studied using X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermal analysis techniques. Relationships between gas adsorption capacity, impregnant distribution and the species of surface impregnants are discussed. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：178 / 194

页数：17

共 38 条

[1] AN EXAMINATION OF THE PRODUCTS FORMED ON REACTION OF HYDROGEN-CYANIDE AND CYANOGEN WITH COPPER, CHROMIUM (6+) AND COPPER CHROMIUM (6+) IMPREGNATED ACTIVATED CARBONS [J].

ALVES, BR ;

CLARK, AJ .

CARBON, 1986, 24 (03) :287-294

[2]

[Anonymous], 1946, 10 NDRC, V1

[3]

BARTON SS, 1989, 19 BIENN C CARB PENN

[4]

BIRENZVIGE A, 1992, EVOLUTION AMMONIA TY, P7

[5]

BREY LA, 2007, Patent No. 7309513

[6] Adsorption of gases in multimolecular layers [J].

Brunauer, S ;

Emmett, PH ;

Teller, E .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1938, 60 :309-319

[7]

Croll LM, 2009, US Patent Application, Patent No. 20100050583

[8]

Doughty, 1996, US Patent, Patent No. 5492882

[9] Influence of HNO3 oxidation on the structure and adsorptive properties of corncob-based activated carbon [J].

El-Hendawy, ANA .

CARBON, 2003, 41 (04) :713-722

[10] Ammonia, cyclohexane, nitrogen and water adsorption capacities of an activated carbon impregnated with increasing amounts of ZnCl2, and designed to chemisorb gaseous NH3 from an air stream [J].

Fortier, H. ;

Westreich, P. ;

Selig, S. ;

Zelenietz, C. ;

Dahn, J. R. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2008, 320 (02) :423-435

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