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
- Resource Relation:
- Conference: Geothermal Resources Council meeting, Hilo, HI, USA, 25 Jul 1978; Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BRINES
ADDITIVES
SCALE CONTROL
GEOTHERMAL FLUIDS
SILICA
PRECIPITATION
SOLIDS
ALCOHOLS
ALDEHYDES
AMIDES
AMINES
BENCH-SCALE EXPERIMENTS
CARBOXYLIC ACIDS
CELLULOSE
CHEMICAL REACTIONS
CORROSION PROTECTION
DETERGENTS
ETHERS
FLASHED STEAM SYSTEMS
ORGANIC POLYMERS
SURFACTANTS
TEST FACILITIES
CARBOHYDRATES
CHALCOGENIDES
EMULSIFIERS
FLUIDS
HYDROXY COMPOUNDS
MINERALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYMERS
POLYSACCHARIDES
SACCHARIDES
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
WETTING AGENTS
Geothermal Legacy
150903* - Geothermal Engineering- Corrosion
Scaling & Materials Development
152003 - Geothermal Data & Theory- Rock-Water-Gas Interactions