<html><head></head><body bgcolor='#FFFFFF' style='font-size:12px;background-color:#FFFFFF;font-family:Verdana, Arial, sans-serif;'><br/>Hi,<br/><br/>First of all, there are at least two different types of biofuel:<br/>First Generation: agricultural feedstock, which is converted by means of biochemical processes (i.e., digestion) --> Biogas<br/>Second Generation: woody biomass that is converted via thermochemical converiosn into a producer or so-calles syngas (Gasification).<br/>Thus, if your goal is to produce Methan or Natural Gas substite for a gas engine or transportation fuel you have different options. But you need to know what is your feedstock (dry , wet, digestable or not digestable such as wood):<br/>If you have a rather dry feedstock you can go for steam gasifiaction (no air, means no Nitrogen). The produced syngas you can catalytilcally convert to CH4, CO2 and H2O. Prior to the methanation process you need to remove the sulphur since it is deactivating your catalyts. H2O and CO2 can then be removed. This process has been investiaget by the Paul Scherrer Institiute in Switzerland (www.psi.ch and www.bio-sng.com).<br/>Removal of nitrogen is too expensive, thus you should avoid feeding it into your process. 2 vol% to max 5vol% N2 in the methan rich gas is acceptable.<br/><br/>Regards,<br/><br/>Jan<br/><br/><blockquote style="border-left: 2px solid blue; margin-left: 5px; padding-left:5px; padding-top:5px;"><hr/><b>Von:</b> "Pannirselvam P.V" <pannirbr@gmail.com><br/><b>Gesendet:</b> May 31, 2011 12:46:54 PM<br/><b>An:</b> "Discussion of biomass pyrolysis and gasification" <gasification@lists.bioenergylists.org><br/><b>Betreff:</b> Re: [Gasification] back to gasification<br/><br/>Dear A.D Karve <div> </div><div> One of the project we have been studying is based on the IGT,Instuite Gas technology patented process called Biotherm , in which the wood gas or syngqs can be passed into the biodigestor, in which CO and Hydrogen can be converted into methane ; the NOX .COX, SOX removed via simple known wet or dry process using activated charcoal and lime ; the methane is then compressed.The N can be removed as ammonia,as this can be very toxic to bio methane bacteria; Syngas obtained via pyrogas can reduce this N2 problem and complexity.Thus pyrogas technology has more potential than wood gas technology</div><div> </div><div> we are studying how to make this complex process into simple innovative process to make possible charcoal and methane economy which is practiced in the developed country in big scale can be made possible in developing village level technology too in small scale ,The project is yet in design stage to reduce CO2 to use as liquid fertilizer too increasing the calorific valued the compressed biogas.</div><div> </div><div>Yours truely</div><div>Pannirselvam</div><div> </div><div> <br/><br/><div class="gmail_quote">On Mon, May 30, 2011 at 11:01 PM, Anand Karve <span><<a href="mailto:adkarve@gmail.com">adkarve@gmail.com</a>></span> wrote:<br/><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Dear List,<br/>We are already using, in India, wood gas made from agricultural waste<br/>to run stationary internal combustion engines. But, for using it as<br/>automobile fuel, it would have to be filled into cylinders, for which<br/>the nitrogen in the wood gas would have to be removed in order to<br/>reduce its bulk and to increase its calorfiic value. Does anybody have<br/>a suggestion as to how this can be achieved?<br/>Yours<br/>A.D.Karve<br/><br/>_______________________________________________<br/>Gasification mailing list<br/><br/>to Send a Message to the list, use the email address<br/><a href="mailto:Gasification@bioenergylists.org">Gasification@bioenergylists.org</a><br/><br/>to UNSUBSCRIBE or Change your List Settings use the web page<br/><a href="http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org</a><br/><br/>for more Gasifiers, News and Information see our web site:<br/><a href="http://gasifiers.bioenergylists.org/">http://gasifiers.bioenergylists.org/</a></blockquote></div><br/><br clear="all"/><br/>--<br/>************************************************<br/>P.V.PANNIRSELVAM<br/>ASSOCIATE . 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