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"fromid": 1,
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"fromtitle": "Main Page",
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"totitle": "TRANGE",
"*": "<tr><td colspan=\"2\" class=\"diff-lineno\" id=\"mw-diff-left-l1\" >Line 1:</td>\n<td colspan=\"2\" class=\"diff-lineno\">Line 1:</td></tr>\n<tr><td class='diff-marker'>\u2212</td><td class='diff-deletedline'><div><del class=\"diffchange\">'''MediaWiki has been successfully installed.'''</del></div></td><td colspan=\"2\"> </td></tr>\n<tr><td class='diff-marker'> </td><td class='diff-context'></td><td class='diff-marker'> </td><td class='diff-context'></td></tr>\n<tr><td class='diff-marker'>\u2212</td><td class='diff-deletedline'><div><del class=\"diffchange diffchange-inline\">Consult </del>the <del class=\"diffchange diffchange-inline\">[//meta.wikimedia.org/wiki/Help:Contents User's Guide] for information on using </del>the <del class=\"diffchange diffchange-inline\">wiki software.</del></div></td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">== </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">OLI Tips #01 What are TRANGES and How to change </ins>the <ins class=\"diffchange diffchange-inline\">report display to see all </ins>the <ins class=\"diffchange diffchange-inline\">solid temperature ranges? ==</ins></div></td></tr>\n<tr><td class='diff-marker'> </td><td class='diff-context'></td><td class='diff-marker'> </td><td class='diff-context'></td></tr>\n<tr><td class='diff-marker'>\u2212</td><td class='diff-deletedline'><div>=<del class=\"diffchange diffchange-inline\">= Getting started ==</del></div></td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td class='diff-marker'>\u2212</td><td class='diff-deletedline'><div><del class=\"diffchange diffchange-inline\">* [//www</del>.<del class=\"diffchange diffchange-inline\">mediawiki</del>.<del class=\"diffchange diffchange-inline\">org/wiki/Manual</del>:<del class=\"diffchange diffchange-inline\">Configuration_settings Configuration settings list]</del></div></td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">TRANGES are a short and name for Temperature anges. The equilibrium constants for some solids in the OLI Databases have been fit to a polynomial in temperature rather than determined from pure thermodynamics. Lets consider a hypothetical solid \u201cA\u201d. If we were to plot the solubility of \u201cA\u201d as a function of temperature based on both thermodynamically derived values and from solubility experiments, the plot may look like this:</ins></div></td></tr>\n<tr><td class='diff-marker'>\u2212</td><td class='diff-deletedline'><div><del class=\"diffchange diffchange-inline\">* [//www</del>.<del class=\"diffchange diffchange-inline\">mediawiki</del>.<del class=\"diffchange diffchange-inline\">org/wiki/Manual</del>:<del class=\"diffchange diffchange-inline\">FAQ MediaWiki FAQ]</del></div></td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td class='diff-marker'>\u2212</td><td class='diff-deletedline'><div><del class=\"diffchange diffchange-inline\">* [https</del>:<del class=\"diffchange diffchange-inline\">//lists</del>.<del class=\"diffchange diffchange-inline\">wikimedia</del>.<del class=\"diffchange diffchange-inline\">org/mailman/listinfo/mediawiki</del>-<del class=\"diffchange diffchange-inline\">announce MediaWiki release mailing list]</del></div></td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\"> </ins></div></td></tr>\n<tr><td class='diff-marker'>\u2212</td><td class='diff-deletedline'><div><del class=\"diffchange diffchange-inline\">* [//www</del>.<del class=\"diffchange diffchange-inline\">mediawiki</del>.<del class=\"diffchange diffchange-inline\">org/wiki/Localisation#Translation_resources Localise MediaWiki </del>for <del class=\"diffchange diffchange-inline\">your language]</del></div></td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Figure 1 Solubility Plot</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">The reason for the difference is that solubility measurements take time and may be kinetically limited. Thermodynamic calculations take values from a variety of sources are may be more stable. It is felt that the solubility measurements more closely represent industrial conditions and the database is adjusted to reflect that feeling.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">The solubility data was fit to a polynomial. Polynomials are notorious for not extrapolating correctly.  The polynomial used for this purpose is:</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Log K </ins>= <ins class=\"diffchange diffchange-inline\">A + B/T + CT + DT2</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Incorrect predictions of Scaling Tendency may result outside the fitted temperature range. Therefore the applicable range is generally limited to data set</ins>.</div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">For example, consider the solubility of sodium carbonate</ins>. <ins class=\"diffchange diffchange-inline\">There are four possible solids</ins>:</div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Na2CO3.10H\u00ac2O, Na2CO3.7H\u00ac2O, Na2CO3</ins>.<ins class=\"diffchange diffchange-inline\">H\u00ac2O and Na2CO3</ins>. <ins class=\"diffchange diffchange-inline\">The solubility temperature limits are</ins>:</div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Solid\tTemperature Range (C)</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Na2CO3\u202210H\u00ac2O\t0-35</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Na2CO3\u20227H\u00ac2O\t35-37</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Na\u00ac2CO3\u20221H2O\t37-109</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Na2CO3\t109-350</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">A plot of the log K for each solid is displayed below</ins>:</div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\"> </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Figure 2 Log K v. Temperature</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">The temperature range in which each solid is stable is displayed with a vertical line on the plot.  For a given solubility of Na2CO3 the lower on the plot, the smaller the Ksp (solubility product) and therefore the higher the scaling tendency. Solids with high scaling tendencies will predict to form.  It can be seen that the deca-hydrate species does not extrapolate well to high temperatures</ins>. <ins class=\"diffchange diffchange-inline\">If we concern ourselves with 350K, we can see that if the deca-hydrate was allowed to be in the model, the equilibrium based solver will attempt include it over the actual solid which is the mono-hydrate</ins>. <ins class=\"diffchange diffchange-inline\">Since the deca</ins>-<ins class=\"diffchange diffchange-inline\">hydrate species is outside its temperature range, it will be mathematically eliminated from the equations.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Such solids are frequently shown in ESP with the tag EXCL TR to indicate that the scaling tendency was calculated but not used actively in the software, the solid was EXCLuded due to Temperature Range issues.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">For the OLI Analyzers, this information is also available. </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Lets create a simple stream definition. Enter 7 moles of NaCl, 0.1 moles of CaSO4 and 55.508 moles of H2O at 25 C and 1 atmosphere. Perform an isothermal calculation.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\"> </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Figure 3 Standard Stream Definition</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Click on the Report tab and scroll down to the Scaling Tendencies.  The default is to display only the solids that may appear at this temperature.  The OLI software sometimes limits the applicable range for a solid due to limitation in the available solubility data. This is collectively known as a Temperature Range (TRANGE)</ins>. <ins class=\"diffchange diffchange-inline\"> Solids that appear outside of the TRANGE are not considered in the calculation</ins>.</div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">  </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Figure 4 Standard Scaling Tendency Report </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">The scaling tendencies </ins>for <ins class=\"diffchange diffchange-inline\">all solids are stored by the StreamAnalyzer. They may be viewed by modifying the report.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\"> </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Click on the Customize button. Now highlight Scaling Tendencies and then Click the Options tab.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">The only change that needs to be made is to uncheck the Active temperature range (TRange) rows only box and to check the Show Tranges box.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\"> </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Figure 5 Changing report options</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">The report will automatically update itself.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\"> </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">The scaling tendencies are now displayed with the stored temperature ranges. A message is also displayed to inform you if a solid is inside or outside the temperature range. If a solid is applicable over the entire range, it is also noted.</ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div> </div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\"> </ins></div></td></tr>\n<tr><td colspan=\"2\"> </td><td class='diff-marker'>+</td><td class='diff-addedline'><div><ins class=\"diffchange diffchange-inline\">Figure 6 Revised reports</ins></div></td></tr>\n"
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}