Effects of organic additives on the formation of solids from hypersaline geothermal brine
Studies are underway to identify compounds that will, at cost-effective concentrations, inhibit scale and solids formation when added to the brine at the high-temperature (approximately 200{sup 0}C) front end of the plant. The study reported here constitutes a preliminary, bench-test screening of 49 substances, the most promising of which will be examined later in on-line pilot plant studies. A variety of substances were tested, including both simple and polymeric alcohols, ethers, aldehydes, carboxylic acids, amines, amides, cellulose derivatives, and classes of materials such as detergents, surfactants, and coupling agents. An inorganic phosphate, KH{sub 2}PO{sub 4}, and a chelating agent EDTA, also were tested. In the present work the additives were mixed with hypersaline brine that had been acidified to pH 4.0 +- 0.3 and flashed to 1 atm, approximately 100{sup 0}C, in the LLL Geothermal Field Test Apparatus near Niland, California. The rate of disappearance of dissolved silica from the treated brine was compared with the rate for untreated brine as a measure of the effectiveness of the additive. (JGB)
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7012454
- Report Number(s):
- UCRL-80970; CONF-780708-17
- Country of Publication:
- United States
- Language:
- English
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ADDITIVES
ALCOHOLS
ALDEHYDES
AMIDES
AMINES
BENCH-SCALE EXPERIMENTS
BRINES
CARBOHYDRATES
CARBOXYLIC ACIDS
CELLULOSE
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION PROTECTION
DETERGENTS
EMULSIFIERS
ETHERS
FLASHED STEAM SYSTEMS
FLUIDS
GEOTHERMAL FLUIDS
Geothermal Legacy
HYDROXY COMPOUNDS
MINERALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLYMERS
POLYSACCHARIDES
PRECIPITATION
SACCHARIDES
SCALE CONTROL
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLIDS
SURFACTANTS
TEST FACILITIES
WETTING AGENTS