https://help.syscad.net/api.php?hidebots=1&urlversion=1&days=7&limit=50&target=Reaction_Block_Energy_Balance&action=feedrecentchanges&feedformat=atomSysCAD Documentation - Changes related to "Reaction Block Energy Balance" [en]2024-03-28T22:17:05ZRelated changesMediaWiki 1.39.4https://help.syscad.net/index.php?title=Reaction_Block_-_Solving_Reactions&diff=79060&oldid=76304Reaction Block - Solving Reactions2024-03-26T07:52:30Z<p><span dir="auto"><span class="autocomment">Advantages and Disadvantages</span></span></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 07:52, 26 March 2024</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17">Line 17:</td>
<td colspan="2" class="diff-lineno">Line 17:</td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># When using Sequential Reactions users can use a source to provide 'recycle' species. </div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># When using Sequential Reactions users can use a source to provide 'recycle' species. </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#* A 'Recycle' species is one that is consumed by some reactions and produced by other reactions. Often the user will have to place the reactions that use the recycle species before (lower order) the ones that produce it (higher order). Products from reactions with a higher order are NOT available to reactions that are lower order. However, if the user inserts a source of the recycle species, then SysCAD ensures that the recycle species from higher order reactions IS available to lower order reactions. This does NOT work for Simultaneous reactions.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#* A 'Recycle' species is one that is consumed by some reactions and produced by other reactions. Often the user will have to place the reactions that use the recycle species before (lower order) the ones that produce it (higher order). Products from reactions with a higher order are NOT available to reactions that are lower order. However, if the user inserts a source of the recycle species, then SysCAD ensures that the recycle species from higher order reactions IS available to lower order reactions. This does NOT work for Simultaneous reactions.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div># <del style="font-weight: bold; text-decoration: none;">Simultaneous </del>reactions <del style="font-weight: bold; text-decoration: none;">may have two or more </del>reactions <del style="font-weight: bold; text-decoration: none;">with </del>Final Conc, Equilibrium, Ratio <del style="font-weight: bold; text-decoration: none;">or </del>Final Frac <del style="font-weight: bold; text-decoration: none;">extent types </del>in the <del style="font-weight: bold; text-decoration: none;">same phase</del>. <del style="font-weight: bold; text-decoration: none;"> You cannot use </del>more than one <del style="font-weight: bold; text-decoration: none;">of these </del>extent <del style="font-weight: bold; text-decoration: none;">types </del>in <del style="font-weight: bold; text-decoration: none;">a phase with Sequential reactions</del>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div># <ins style="font-weight: bold; text-decoration: none;">When defining simultaneous </ins>reactions<ins style="font-weight: bold; text-decoration: none;">, users can specify multiple </ins>reactions <ins style="font-weight: bold; text-decoration: none;">using extent types such as </ins>Final Conc<ins style="font-weight: bold; text-decoration: none;">, Final Frac</ins>, Equilibrium, <ins style="font-weight: bold; text-decoration: none;">or </ins>Ratio<ins style="font-weight: bold; text-decoration: none;">, all within a single sequence number. These reactions will be solved concurrently, yielding the correct ‘final’ extent at that sequence step. In the case of sequential reactions, extent types like Final Conc, </ins>Final Frac<ins style="font-weight: bold; text-decoration: none;">, Equilibrium, or Ratio should only be used for the last reaction </ins>in the <ins style="font-weight: bold; text-decoration: none;">reaction file</ins>. <ins style="font-weight: bold; text-decoration: none;">If these reaction types are applied to </ins>more than one <ins style="font-weight: bold; text-decoration: none;">reaction, the ‘Final’ </ins>extent <ins style="font-weight: bold; text-decoration: none;">is only accurate for that specific reaction step. Any subsequent reaction may cause the concentration to deviate from the value calculated </ins>in <ins style="font-weight: bold; text-decoration: none;">the previous step</ins>.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># If a number of reactions use the same reagent and there is insufficient reagent to satisfy all of the requirements then the following will occur:</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div># If a number of reactions use the same reagent and there is insufficient reagent to satisfy all of the requirements then the following will occur:</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#* With Sequential reactions the first reaction will use as much of the reagent that it requires, any that is left over is available for the next reaction and so on. So, the first reactions may achieve their required extents and subsequent reactions may be completely starved.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>#* With Sequential reactions the first reaction will use as much of the reagent that it requires, any that is left over is available for the next reaction and so on. So, the first reactions may achieve their required extents and subsequent reactions may be completely starved.</div></td></tr>
</table>Merry.Huang