Preliminary results of tests of proprietary chemical additives, seeding, and other approaches for the reduction of scale in hypersaline geothermal systems

PDF Version Also Available for Download.

Description

The LLL field brine-scaling test system and a variety of measurement techniques have been used to test a group of eight proprietary additives from eight different companies, a hydroxyethylcellulose previously found to retard silica precipitation, and geothermal sludge as a seeding agent to reduce scaling. For each additive, scaling rates at both 210 and 125/sup 0/C and on three different materials--mild steel, Teflon, and Hastelloy C-276--were measured using test coupons. Sections of steel pipe and perforated screens also were exposed to the treated brine, silica precipitation rates in the effluent brine were measured by means of the electrochemical linear polarization ... continued below

Physical Description

Pages: 37

Creation Information

Harrar, J.E.; Locke, F.E.; Otto, C.H. Jr.; Deutscher, S.B.; Lim, R.; Frey, W.P. et al. February 1, 1979.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The LLL field brine-scaling test system and a variety of measurement techniques have been used to test a group of eight proprietary additives from eight different companies, a hydroxyethylcellulose previously found to retard silica precipitation, and geothermal sludge as a seeding agent to reduce scaling. For each additive, scaling rates at both 210 and 125/sup 0/C and on three different materials--mild steel, Teflon, and Hastelloy C-276--were measured using test coupons. Sections of steel pipe and perforated screens also were exposed to the treated brine, silica precipitation rates in the effluent brine were measured by means of the electrochemical linear polarization resistance technique. Examination of the pipe sections and chemical analyses of the scales are not complete, thus only preliminary conclusions are reported here. It appears that, although none of the additives effected a dramatic reduction in scaling rates, several decreased the rate of scaling of mild steel at 125/sup 0/C by a factor of 2 to 3. Only hydroxyethylcellulose retards the rate of precipitation of silica in the effluent brine. Scaling rates could not be measured accurately in the seeding experiment because of its short duration, but this brine treatment had the desired effect, at 125/sup 0/C, of reducing the level of dissolved silica and hence the scaling tendency of the brine. Further experiments of this type will be conducted.

Physical Description

Pages: 37

Notes

Dep. NTIS, PC A03/MF A01.

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: UCID-18051
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/6435972 | External Link
  • Office of Scientific & Technical Information Report Number: 6435972
  • Archival Resource Key: ark:/67531/metadc1204165

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • February 1, 1979

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

Description Last Updated

  • Oct. 18, 2018, 12:35 p.m.

Usage Statistics

When was this report last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Harrar, J.E.; Locke, F.E.; Otto, C.H. Jr.; Deutscher, S.B.; Lim, R.; Frey, W.P. et al. Preliminary results of tests of proprietary chemical additives, seeding, and other approaches for the reduction of scale in hypersaline geothermal systems, report, February 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1204165/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.