A study of steel alloys for potential use in CO2 sequestration Page: 3 of 12
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
temperature, 23 C, and 63 C. Tests were also conducted at both temperature levels in
basic and acidified conditions (pH 9.4 and 4.5). It was important to test in both pH
environments. Tests were conducted in an acid pH because CO2 forms carbonic acid and
creates a low pH in solution. Tests were conducted in a basic solution because 1) the
mineral sequestration process is enhanced with the addition of NaHCO3 and the resulting
equilibrium tends to raise the pH5 and 2) under high pressures CO2 solutions tend to
move toward becoming basic. In all cases the solutions were saturated, by bubbling with
CO2, before and during the immersion corrosion tests. The immersion tests used the same
samples used in the other tests. In the case of immersion tests the entire surface was
exposed to the test solutions. The total area of contact was 26.2cm2. Samples were
cleaned, dried, and weighed before testing. The samples were immersed in the stirred
solution for four hrs, which matched the test time for the slurry erosion/corrosion tests.
After the test the samples were again cleaned, dried, and weighed.
Component Concentration
NaHCO3 0.64 M
NaCl 1.0 M
MgCl2 0.003 M
Table 1, solution test chemistry for corrosion tests.
Dry Jet Erosion
The dry jet erosion tests were performed in accordance with ASTM G76-83 "Standard
Practice for Conducting Erosion Tests by Solid Particle Impingement Using Gas Jets"6.
The apparatus consisted of a gas supply, gas-particle mixing system that delivered the
abrasive flux though a WC nozzle, which in turn was aimed at a specimen stand. Figure 1
shows a dry jet erosion test taking place on a test sample. The carrier gas used for these
studies was dry air. The abrasive used was 270pm silica sand particles. Particle velocity
was 20m
Upcoming Pages
Here’s what’s next.
Search Inside
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Tylczak, Joseph H.; Rawers, James C. & Blankenship, Daniel. A study of steel alloys for potential use in CO2 sequestration, article, January 1, 2005; Pittsburgh, Pennsylvania. (https://digital.library.unt.edu/ark:/67531/metadc889440/m1/3/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.