rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: The
    title: ultra-high lime with aluminum process for removing chloride from recirculating cooling water
  name:
    name part: Abdel-wahab, Ahmed Ibraheem Ali
    name part: 1968-
    role:
      role term: creator
  name:
    name part: Batchelor, Bill
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2003
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: remote
    extent: 1 online resource.
  abstract: Chloride is a deleterious ionic species in cooling water systems because it is important in promoting corrosion. Chloride can be removed from cooling water by precipitation as calcium chloroaluminate using ultra-high lime with aluminum process (UHLA). The research program was conducted to study equilibrium characteristics and kinetics of chloride removal by UHLA process, study interactions between chloride and sulfate or silica, and develop a model for multicomponent removal by UHLA. Kinetics of chloride removal with UHLA was investigated. Chloride removal was found to be fast and therefore, removal kinetics should not be a limitation to applying the UHLA process. Equilibrium characteristics of chloride removal with UHLA were characterized. Good chloride removal was obtained at reasonable ranges of lime and aluminum doses. However, the stoichiometry of chloride removal with UHLA deviated from the theoretical stoichiometry of calcium chloroaluminate precipitation. Equilibrium modeling of experimental data and XRD analysis of precipitated solids indicated that this deviation was due to the formation of other solid phases such as tricalcium hydroxyaluminate and tetracalcium hydroxyaluminate. Effect of pH on chloride removal was characterized. Optimum pH for maximum chloride removal was pH 12 ± 0.2. Results of equilibrium experiments at different temperatures indicated that final chloride concentrations slightly increased when water temperature increased at temperatures below 40oC. However, at temperatures above 40oC, chloride concentration substantially increased with increasing water temperature. An equilibrium model was developed to describe chemical behavior of chloride removal from recycled cooling water using UHLA. Formation of a solid solution of calcium chloroaluminate, tricalcium hydroxyaluminate, and tetracalcium hydroxyaluminate was found to be the best mechanism to describe the chemical behavior of chloride removal with UHLA. Results of experiments that stud…
  note: by Ahmed Ibraheem Ali Abdel-wahab.
  note: "Major Subject: Civil Engineering"
  note: Title from author supplied metadata.
  note: Electronic resource.
  note: Ph. D. Texas A & M University 2003.
  note: Includes bibliographical references.
  note: Text (Dissertation).
  subject:
    topic: Major civil engineering
  subject:
    topic: cooling Water
  subject:
    topic: lime Softening
  subject:
    topic: chloride
  subject:
    topic: water recycle
  identifier: http://hdl.handle.net/1969.1/446
  record info:
    record content source: TXA
    record creation date: 030912
    record change date: 20151025094941.0
    record identifier: in00001767578