Evidence for the presence of cyanide during carbon activation by KOH

被引：15

作者：

Fuente, E. ^{[1
]}

Gil, R. R. ^{[1
]}

Giron, R. P. ^{[1
]}

Lillo-Rodenas, M. A. ^{[2
]}

Montes-Moran, M. A. ^{[1
]}

Martin, M. J. ^{[3
]}

Linares-Solano, A. ^{[2
]}

机构：

[1] CSIC, Inst Nacl Carbon, E-33080 Oviedo, Spain

[2] Univ Alicante, Grp Mat Carbonosos & Medioambiente MCMA, Dept Quim Inorgan, E-03080 Alicante, Spain

[3] Univ Girona, LEQUIA, Inst Medi Ambient, Fac Ciencies, Girona 17071, Spain

来源：

CARBON | 2010年 / 48卷 / 04期

关键词：

SLUDGE-BASED PRECURSORS; QUERCUS-AGRIFOLIA CHAR; CHEMICAL ACTIVATION; ALKALINE HYDROXIDES; ROOM-TEMPERATURE; NAOH; ADSORBENTS; MECHANISM; POROSITY;

D O I：

10.1016/j.carbon.2009.11.022

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：

The observation that carbon activation by KOH gives rise to a significant formation of cyanide moieties is confirmed. However, contrary to what has been reported, our results show that the N-2 used as an atmosphere during the activation process has little to do with the formation of such cyanide moieties. The main source of cyanides is ascribed to structural nitrogen already present in the precursors. Reducing species (H-2 and metallic K) formed during the KOH carbon activation process might promote the transformation of that structural nitrogen to cyanides. In order to minimise cyanide formation (and related environmental concerns), materials with low nitrogen content should be selected as precursors for the preparation of KOH-activated carbons. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1032 / 1037

页数：6

共 23 条

[1] The preparation of activated carbon from macadamia nutshell by chemical activation [J].