The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen

Abstract In this work, the effect of weak acid anions on the ammonia removal has been extensively studied for the process of selective catalytic wet air oxidation (CWAO) of ammonia to nitrogen. It is found that the presence of weak acid anions can effectively enhance the ammonia conversion and selec...

Full description

Bibliographic Details
Main Authors:	Zidan Wang, Sohaib Hameed, Yaoyao Wen, Nuowei Zhang, Hengjun Gai, Jinbao Zheng, Bing H. Chen
Format:	Article
Language:	English
Published:	Nature Publishing Group 2017-06-01
Series:	Scientific Reports
Online Access:	https://doi.org/10.1038/s41598-017-04207-5

id	doaj-945826c2773a43c289c14892e4062399
record_format	Article
spelling	doaj-945826c2773a43c289c14892e40623992020-12-08T00:03:39ZengNature Publishing GroupScientific Reports2045-23222017-06-017111110.1038/s41598-017-04207-5The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogenZidan Wang0Sohaib Hameed1Yaoyao Wen2Nuowei Zhang3Hengjun Gai4Jinbao Zheng5Bing H. Chen6Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen UniversityDepartment of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen UniversityDepartment of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen UniversityDepartment of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen UniversityQingdao University of Science and TechnologyQingdao University of Science and TechnologyDepartment of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen UniversityAbstract In this work, the effect of weak acid anions on the ammonia removal has been extensively studied for the process of selective catalytic wet air oxidation (CWAO) of ammonia to nitrogen. It is found that the presence of weak acid anions can effectively enhance the ammonia conversion and selectivity towards nitrogen. The combination between the weak acid anions and H+ to produce weak acid molecules is responsible for such enhancement. Firstly, the H+ consumption of weak acid anions can increase the NH3 concentration and thus the reactivity of ammonia oxidation, due to the shift to NH3 on the equilibrium of NH4 +/NH3. Secondly, the competition combination with H+ between the weak acid anions and NO2 − can increase the concentration of NO2 − and thus boosts the disproportionation reaction between NH4 + and NO2 − to produce nitrogen.https://doi.org/10.1038/s41598-017-04207-5
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zidan Wang Sohaib Hameed Yaoyao Wen Nuowei Zhang Hengjun Gai Jinbao Zheng Bing H. Chen
spellingShingle	Zidan Wang Sohaib Hameed Yaoyao Wen Nuowei Zhang Hengjun Gai Jinbao Zheng Bing H. Chen The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen Scientific Reports
author_facet	Zidan Wang Sohaib Hameed Yaoyao Wen Nuowei Zhang Hengjun Gai Jinbao Zheng Bing H. Chen
author_sort	Zidan Wang
title	The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen
title_short	The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen
title_full	The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen
title_fullStr	The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen
title_full_unstemmed	The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen
title_sort	effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen
publisher	Nature Publishing Group
series	Scientific Reports
issn	2045-2322
publishDate	2017-06-01
description	Abstract In this work, the effect of weak acid anions on the ammonia removal has been extensively studied for the process of selective catalytic wet air oxidation (CWAO) of ammonia to nitrogen. It is found that the presence of weak acid anions can effectively enhance the ammonia conversion and selectivity towards nitrogen. The combination between the weak acid anions and H+ to produce weak acid molecules is responsible for such enhancement. Firstly, the H+ consumption of weak acid anions can increase the NH3 concentration and thus the reactivity of ammonia oxidation, due to the shift to NH3 on the equilibrium of NH4 +/NH3. Secondly, the competition combination with H+ between the weak acid anions and NO2 − can increase the concentration of NO2 − and thus boosts the disproportionation reaction between NH4 + and NO2 − to produce nitrogen.
url	https://doi.org/10.1038/s41598-017-04207-5
work_keys_str_mv	AT zidanwang theeffectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT sohaibhameed theeffectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT yaoyaowen theeffectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT nuoweizhang theeffectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT hengjungai theeffectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT jinbaozheng theeffectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT binghchen theeffectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT zidanwang effectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT sohaibhameed effectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT yaoyaowen effectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT nuoweizhang effectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT hengjungai effectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT jinbaozheng effectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen AT binghchen effectofweakacidanionsontheselectivecatalyticwetairoxidationofaqueousammoniatonitrogen
_version_	1724396838539231232

The effect of weak acid anions on the selective catalytic wet air oxidation of aqueous ammonia to nitrogen

Similar Items