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Title: Waste Water for Power Generation via Energy Efficient Selective Silica Separations

Abstract

Silica is ubiquitous in produced and industrial waters, and plays a major disruptive role in water recycle. Herein we have investigated the use of mixed oxides for the removal of silica from these waters, and their incorporation into a low cost and low energy water purification process. High selectivity hydrotalcite (HTC, (Mg 6Al 2(OH) 16(CO 3)•4H 2O)), is combined in series with high surface area active alumina (AA, (Al 2O 3)) as the dissolved silica removal media. Batch test results indicated that combined HTC/AA is a more effective method for removing silica from industrial cooling tower wasters (CTW) than using HTC or AA separately. The silica uptake via ion exchange on the mixed oxides was confirmed by Fourier transform infrared (FTIR), and Energy dispersive spectroscopy (EDS). Furthermore, HTC/AA effectively removes silica from CTW even in the presence of large concentrations of competing anions, such as Cl -, NO 3 - HCO 3 -, CO 3 2- and SO 4 2-. Similar to batch tests, Single Path Flow Through (SPFT) tests with sequential HTC/AA column filtration has very high silica removal too. Technoeconomic Analysis (TEA) was simultaneously performed for cost comparisons to existing silica removal technologies.

Authors:
 [1];  [1];  [1];  [2];  [2];  [1];  [3];  [3];  [3]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1395755
Report Number(s):
SAND-2017-10324
657251
DOE Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; 36 MATERIALS SCIENCE

Citation Formats

Nenoff, Tina M., Brady, Patrick Vane, Sasan, Koroush, Paap, Scott M., Heimer, Brandon Walter, Krumhansl, James L., Howe, Kerry, Stoll, Zachary, and Stomp, James. Waste Water for Power Generation via Energy Efficient Selective Silica Separations. United States: N. p., 2017. Web. doi:10.2172/1395755.
Nenoff, Tina M., Brady, Patrick Vane, Sasan, Koroush, Paap, Scott M., Heimer, Brandon Walter, Krumhansl, James L., Howe, Kerry, Stoll, Zachary, & Stomp, James. Waste Water for Power Generation via Energy Efficient Selective Silica Separations. United States. doi:10.2172/1395755.
Nenoff, Tina M., Brady, Patrick Vane, Sasan, Koroush, Paap, Scott M., Heimer, Brandon Walter, Krumhansl, James L., Howe, Kerry, Stoll, Zachary, and Stomp, James. Fri . "Waste Water for Power Generation via Energy Efficient Selective Silica Separations". United States. doi:10.2172/1395755. https://www.osti.gov/servlets/purl/1395755.
@article{osti_1395755,
title = {Waste Water for Power Generation via Energy Efficient Selective Silica Separations},
author = {Nenoff, Tina M. and Brady, Patrick Vane and Sasan, Koroush and Paap, Scott M. and Heimer, Brandon Walter and Krumhansl, James L. and Howe, Kerry and Stoll, Zachary and Stomp, James},
abstractNote = {Silica is ubiquitous in produced and industrial waters, and plays a major disruptive role in water recycle. Herein we have investigated the use of mixed oxides for the removal of silica from these waters, and their incorporation into a low cost and low energy water purification process. High selectivity hydrotalcite (HTC, (Mg6Al2(OH)16(CO3)•4H2O)), is combined in series with high surface area active alumina (AA, (Al2O3)) as the dissolved silica removal media. Batch test results indicated that combined HTC/AA is a more effective method for removing silica from industrial cooling tower wasters (CTW) than using HTC or AA separately. The silica uptake via ion exchange on the mixed oxides was confirmed by Fourier transform infrared (FTIR), and Energy dispersive spectroscopy (EDS). Furthermore, HTC/AA effectively removes silica from CTW even in the presence of large concentrations of competing anions, such as Cl-, NO3- HCO3-, CO32- and SO42-. Similar to batch tests, Single Path Flow Through (SPFT) tests with sequential HTC/AA column filtration has very high silica removal too. Technoeconomic Analysis (TEA) was simultaneously performed for cost comparisons to existing silica removal technologies.},
doi = {10.2172/1395755},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 2017},
month = {Fri Sep 01 00:00:00 EDT 2017}
}

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