Flat-plate solar-array project silicon material task. Task I. Silicon material. Investigation of the hydrochlorination of SiCl/sub 4/. Fifth quarterly report, July 9-October 8, 1982

Technical Report · Fri Oct 15 04:00:00 EDT 1982

DOI:https://doi.org/10.2172/6981627· OSTI ID:6981627

Mui, J. Y.P.

Work has been extended to further the basic experimental study on the hydrochlorination of SiCl/sub 4/ and m.g. silicon metal to produce SiHCl/sub 3/. The extended research and development work includes reaction kinetic measurements at the higher temperature range (up to 650/sup 0/C). These additional kinetic data are needed for the theoretical study to develop a rate equation and to determine important thermodynamic functions, such as, ..delta..H and ..delta..E. A reaction mechanism study includes experiments on the deuterium kinetic isotope effects. An experimental study on the effect of catalysts and impurities on the hydrochlorination reaction is also planned. The objective is to provide a basic understanding on the nature of the catalyst and to search for a still more effective catalyst for the hydrochlorination reaction. Reaction kinetic measurements on the hydrochlorination of SiCl/sub 4/ and m.g. silicon metal were carried out at two higher temperatures, 550/sup 0/C and 525/sup 0/C, and at two pressure ranges, 200 psig and 100 psig. These higher reaction temperature data are also used in the theoretical study for the development of a kinetic model and a rate equation for the hydrochlorination reaction. Preliminary results on the theoretical treatments of reaction rate data at 550/sup 0/C, 50/sup 0/C and 450/sup 0/C show that the rate of formation of SiHCl/sub 3/ follows a psuedo-first order kinetics. The rate constants at these three temperatures and the activation energy, ..delta..E, are calculated and reported. The design of a quartz hydrochlorination reactor for the planned experiments on deuterium kinetic isotope effects has been completed. This quartz reactor can also be used to measure reaction rate and the equilibrium conversion of SiHCl/sub 3/ at the higher temperature range where the present stainless steel reactor becomes unusable. More experimental work is in progress.

• Research Organization: Solarelectronics, Inc., Bellingham, MA (USA)
• DOE Contract Number: NAS-7-100-956061
• OSTI ID: 6981627
• Report Number(s): DOE/JPL/956061-5; ON: DE83002787
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ACTIVATION ENERGY
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTS
ENERGY
ENTHALPY
EXPERIMENT PLANNING
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
HYDRIDES
HYDROGEN COMPOUNDS
IMPURITIES
KINETICS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLANNING
PRESSURE DEPENDENCE
PRODUCTION
QUARTZ
REACTION KINETICS
SEMIMETALS
SILANES
SILICON
SILICON CHLORIDES
SILICON COMPOUNDS
SILICON OXIDES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES