REDUCTION OF NITROGEN OXIDE

PROBLEM TO BE SOLVED: To provide a method by which the generation of secondary waste is eliminated and high advantage is obtained in terms of equipment and economy and further, a reaction product can be made valuable in its industrial applications. SOLUTION: An electrolytic dialysis device 18 is use...

Full description

Saved in:
Bibliographic Details
Main Authors AKAI YOSHIE, FUJIHATA KENJI
Format Patent
LanguageEnglish
Published 28.10.1997
Edition6
Subjects
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide a method by which the generation of secondary waste is eliminated and high advantage is obtained in terms of equipment and economy and further, a reaction product can be made valuable in its industrial applications. SOLUTION: An electrolytic dialysis device 18 is used which has a cation exchange membrane 7 arranged between a cathode 5 and an anode 6. In addition, an acidic solution(HA) is supplied into an anodic chamber 17 between the anode 6 and the cation exchange membrane 7, while a waste liquid containing an alkaline solution(MOH) 1 and an NOx gas 15 is supplied into a cathodic chamber 16 between the cathode 5 and the cation exchange membrane 7. Further, electrolytic dialysis is performed by applying a DC voltage to the cathode 5 and the anode 6. Consequently, it follows: NOx (g)+ nOH<-> NOx+n <-> +n/2 H2 O, 3NOx<-> +2H2 (g)+6xH<+> →NH4 <+> +N2 +3xH2 O, NH4 <+> +OH<-> NH3 ↑+N2 O. Thus it is possible to convert NO2 gas to NH3 gas or NH4 <+> ion or N2 gas.
Bibliography:Application Number: JP19960087963