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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Saiteja<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In an updraft fixed bed gasifier there is no clear link between maximal temperature and tar content in the gas.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Slagging takes place in the oxidizing zone in the bottom of the reaction zone, tar is made in pyrolysis zone in the top of the bed.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you observe slagging you can inject water together with the air – eg if you use a water scrubber as part of you gas cleaning you have a fraction
to get rid of. That is one way to reduce the temperature. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">There Is a lot of reports from the development of the Vølund updraft gasifier in Harboøre that vould be very relevant for you to read.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.res-chains.eu/wp-content/uploads/2013/04/Case-Study-Gasification-Harbo%C3%B8re.pdf">http://www.res-chains.eu/wp-content/uploads/2013/04/Case-Study-Gasification-Harbo%C3%B8re.pdf</a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thomas<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Fra:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Gasification [mailto:gasification-bounces@lists.bioener</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">gylists.org]
<b>På vegne af </b>Saiteja Chinta<br>
<b>Sendt:</b> 25. maj 2015 08:04<br>
<b>Til:</b> gasification@lists.bioenergylists.org<br>
<b>Emne:</b> [Gasification] Difference between biomass and coal gasification<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p>Hi all,<o:p></o:p></p>
<p>Thanks for the response, but I am once again stating my question with some specifications.<o:p></o:p></p>
<p>I am interested in coal gasification where coal used is with high ash content and less reactive.<o:p></o:p></p>
<p>Capacity of gasifier is around 30 Tons of coal per day and technology is updraft fixed bed.<o:p></o:p></p>
<p>If the reactor is operated at high temperature to crack any tar, ash would come out in molten form (Not desired) as conditions will cross ash melting point.<o:p></o:p></p>
<p>So in this sense, tar generated after gas cooling be recycled into gasifier?<o:p></o:p></p>
<p>Regards,<o:p></o:p></p>
<p>Saiteja<o:p></o:p></p>
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