Flat-Plate Solar Array Project. Task I. Silicon material. Investigation of the hydrochlorination of SiCl/sub 4/. Second quarterly report, October 1, 1981-January 8, 1982

Technical Report · Sat Jan 09 04:00:00 EST 1982

DOI:https://doi.org/10.2172/5357769· OSTI ID:5357769

Mui, J. Y.P.

A new two inch-diameter stainless steel reactor was designed and built to operate at pressures up to 500 psig for the experimental studies on the hydrochlorination of SiCl/sub 4/ and metallurgical grade (m.g.) silicon metal to SiHCl/sub 3/, 3 SiCl/sub 4/ + 2 H/sub 2/ + Si = 4 SiHCl/sub 3/. After a thorough safety review, the hydrochlorination reactor system was successfully started-up. Preliminary experiments on the hydrochlorination of SiCl/sub 4/ and m.g. silicon metal were carried out. One experiment was conducted under the same reaction conditions as that carried out previously with the one inch-diameter laboratory reactor. Results of the reaction kinetic measurements with the 2'' reactor show good agreement with the previously obtained results. The effect of pressure on the hydrochlorination reaction was studied. The experiments were carried out at low reactor pressures of 73 psig and 150 psig, respectively. A large pressure effect on the hydrochlorination reaction was observed. In general, higher pressure produces a higher conversion of SiHCl/sub 3/ but at a slower reaction rate. The effect of temperature on the hydrochlorination reaction was studied at 73 psig. As previously observed, higher reaction temperature gives both a higher conversion of SiHCl/sub 3/ and a higher reaction rate. Samples of the material of construction for the hydrochlorination reactor were prepared for the corrosion study. Materials include Type 304 stainless steel, carbon steel, Incoloy 800H, Alloy 400 (Monel), Hastelloy B-2 (a Ni/Mo alloy), nickel and copper. These test samples were mounted in a stainless steel rack which was fitted inside the 2'' reactor tube. The corrosion tests are in progress.

• Research Organization: Solarelectronics, Inc., Bellingham, MA (USA)
• DOE Contract Number: NAS-7-100-956061
• OSTI ID: 5357769
• Report Number(s): DOE/JPL/956061-2; ON: DE82010775
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501* -- Solar Energy Conversion-- Photovoltaic Conversion
ALLOYS
CARBON STEELS
CHEMICAL REACTIONS
CHEMICAL REACTORS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COPPER
COPPER ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
ELEMENTS
HALIDES
HALOGEN COMPOUNDS
HASTELLOY B
HASTELLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDRIDES
HYDROGEN COMPOUNDS
INCOLOY 800
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
MATERIALS
METALS
MOLYBDENUM ALLOYS
MONEL
NICKEL
NICKEL ALLOYS
NICKEL BASE ALLOYS
PRESSURE DEPENDENCE
REACTION KINETICS
SEMIMETALS
SILANES
SILICON
SILICON CHLORIDES
SILICON COMPOUNDS
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS