文献类型：期刊文献

英文题名：Experimental determination of equilibrium constant for the complexing reaction of nitric oxide with hexamminecobalt(II) in aqueous solution

作者：Mao, Yan-peng[1];Chen, Hua[1];Long, Xiang-li[1];Xiao, Wen-de[1];Li, Wei[1];Yuan, Wei-kang[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：162

期号：1

起止页码：99

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20085011783584);WOS:【SCI-EXPANDED(收录号:WOS:000263149400013)】；

基金：The present work is supported by the Ministry of Science and Technology of China (No. 2006AA05Z307).

语种：英文

外文关键词：Nitric oxide; Hexamminecobalt(II); Absorption; Equilibrium constant; Ammonia

摘要：Ammonia solution can be used to scrub NO from the flue gases by adding soluble cobalt(II) salts into the aqueous ammonia solutions. The hexamminecobalt(II), Co(NH3)(6)(2+), formed by ammonia binding with Co2+ is the active constituent of eliminating NO from the flue gas streams. The hexamminecobalt(II) can combine with NO to form a complex. For the development of this process, the data of the equilibrium constants for the coordination between NO and Co(NH3)(6)(2+) over a range of temperature is very important. Therefore, a series of experiments were performed in a bubble column to investigate the chemical equilibrium. The equilibrium constant was determined in the temperature range of 30.0-80.0 degrees C under atmospheric pressure at pH 9.14. All experimental data fit the following equation well: K-p = (1.9051 +/- 0.124) x 10(-6) exp (5359.25 +/- 280.13 / T) (bar(-1)) where the enthalpy and entropy are Delta H degrees = -(44.559 +/- 2.329) kJ mol(-1) and Delta S degrees = -(109.50 +/- 7.126) JK(-1) mol(-1), respectively. (C) 2008 Published by Elsevier B.V.