Sakaida, Roy R. (1960-01-01) I. A study of the catalytic decomposition of nitric oxide. II. A chromatographic apparatus and technique for the analysis of nitric oxide in nitrogen. III. Kinetics and mechanism of the air oxidation of the dithionite ion (S2O4=) in aqueous solution. http://resolver.caltech.edu/CaltechETD:etd-07112006-080753

Type of Document

Dissertation

Author

Sakaida, Roy R.

URN

etd-07112006-080753

Persistent URL

http://resolver.caltech.edu/CaltechETD:etd-07112006-080753

Title

I. A study of the catalytic decomposition of nitric oxide. II. A chromatographic apparatus and technique for the analysis of nitric oxide in nitrogen. III. Kinetics and mechanism of the air oxidation of the dithionite ion (S2O4=) in aqueous solution

Degree

PhD

Option

Chemical Engineering

Advisory Committee

Advisor Name	Title
William Harrison Corcoran	Committee Chair
Bruce H. Sage	Committee Member
Paul A. Longwell	Committee Member
William N. Lacey	Committee Member

Keywords

none

Date of Defense

1960-01-01

Availability

unrestricted

Abstract

Part I: The study of the catalytic decomposition of nitric oxide at a concentration of 0.5% by volume in nitrogen was conducted over a packed bed in a tubular flow reactor. The packed bed was in the form of alumina pellets impregnated with 0.1% by weight of platinum oxide and 3.0% by weight of nickel oxide. Tests which were conducted at pressures of 1 to 15 atm and temperatures of 800 to 1000°F showed that the rate is second-order with respect to the nitric oxide and is retarded by the adsorption of atomic oxygen on the surface of the catalyst.

Part II: In conjunction with the decomposition studies, a gas chromatographic technique for the analysis of nitric oxide at a concentration of less than 0.5% by volume in nitrogen was developed. The chromatograph column with a length of 8 ft contained silica gel and was operated in a temperature range of 65 to 85°C. Helium was used as the carrier gas, and the eluted components were measured by means of a thermal conductivity cell with dual thermistors.

Part III: A study of the air oxidation of sodium dithionite in aqueous solution was made. A mechanism was proposed in which the SO2- freeradical ion was the reactive intermediate. The rate of oxidation was found to be half-order with respect to the dithionite ion and first-order with respect to molecular oxygen.

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