NJIT eTD::njit-etd1990-007::Yang, Chen-Lu::"Aqueous absorption of NOx induced by sodium chlorite oxidation"

Aqueous scrubbing in alkaline media for the removal of nitrogen oxides (NO_x) from flue gases using NaClO₂ as an oxidant is being investigated in the Chemical Engineering Department of New Jersey Institute of Technology. This thesis presents the findings of an experimental program that was conducted to estimate the capability of NaClO₂ aqueous solution to oxidize insoluble NO to soluble NO₂ in order to increase its solubility and thus prevent NO_x emission from entering the atmosphere from flue gases emitted by municipal incinerators or power plants.

The key findings of this program are:

* NO is not absorbed by NaOH aqueous scrubbing solutions.

* NO₂ is essentially quantitatively absorbed in NaOH aqueous scrubbing solutions.

* Addition of NO₂ improves No absorption in NaOH solution.

* NaClO₂ containing aqueous scrubbing medium quantitatively oxidizes NO to nitrate.

* Concentrations greater than 0.1M NaOH inhibit No absorption in 0.008M NaClO₂ containing aqueous scrubbing media.

* Aqueous scrubbing media containing less than 0.1M NaOH quantitatively absorb NO induced by NaClO₂ oxidation.

* The presence of 5% Oxygen in flue gases reduces by 11.5% NO absorption induced by NaClO₂ oxidation.

* Mass transfer rather than chemical reaction kinetics seems to dominate the NO absorption process.

Title:	Aqueous absorption of NOx induced by sodium chlorite oxidation
Author:	Yang, Chen-Lu
Document Type:	Thesis
Department:	Department of Chemical Engineering, Chemistry and Environmental Science
Degree:	Master of Science
Major:	Environmental Science
Advisory Committee:	Shaw, Henry Bozzelli, Joseph W. Trattner, Richard B.
Thesis Date:	1990, January
Keywords:	Nitrogen Oxides--Absorption and Adsorption Nitrogen Oxides--Oxidation Air--Purification
Availability:	Unrestricted
Abstract:	Aqueous scrubbing in alkaline media for the removal of nitrogen oxides (NO_x) from flue gases using NaClO₂ as an oxidant is being investigated in the Chemical Engineering Department of New Jersey Institute of Technology. This thesis presents the findings of an experimental program that was conducted to estimate the capability of NaClO₂ aqueous solution to oxidize insoluble NO to soluble NO₂ in order to increase its solubility and thus prevent NO_x emission from entering the atmosphere from flue gases emitted by municipal incinerators or power plants. The key findings of this program are: * NO is not absorbed by NaOH aqueous scrubbing solutions. * NO₂ is essentially quantitatively absorbed in NaOH aqueous scrubbing solutions. * Addition of NO₂ improves No absorption in NaOH solution. * NaClO₂ containing aqueous scrubbing medium quantitatively oxidizes NO to nitrate. * Concentrations greater than 0.1M NaOH inhibit No absorption in 0.008M NaClO₂ containing aqueous scrubbing media. * Aqueous scrubbing media containing less than 0.1M NaOH quantitatively absorb NO induced by NaClO₂ oxidation. * The presence of 5% Oxygen in flue gases reduces by 11.5% NO absorption induced by NaClO₂ oxidation. * Mass transfer rather than chemical reaction kinetics seems to dominate the NO absorption process.
Complete Thesis:	njit-etd1990-007 (92 pages ~ 5,584 KB pdf)
Download by Chapters:	Front Matter (Title Page, Abstract, Table of Contents, etc. ~ 10 pages ~ 1,113 KB pdf) Chapter 1: Introduction (11 pages ~ 1,778 KB pdf) Chapter 2: Gas Absorption (12 pages ~ 599 KB pdf) Chapter 3: A Literature Review of NO Absorption (12 pages ~ 509 KB pdf) Chapter 4: Experimental Program (16 pages ~ 593 KB pdf) Chapter 5 : Results (25 pages ~ 695 KB pdf) Chapter 6: Discussion (4 pages ~ 179 KB pdf) Chapter 7: Conclusions and Recommendations (4 pages ~ 164 KB pdf) References (6 pages ~ 243 KB pdf)
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