On Tue, 5 Feb 2013 06:25:30 +1300, doug.williams wrote in message <DB8D540DF093480B8FE5AAFC2A861AD9@dougspc>:
> > Hi Arnt, > > You ask: > > > ..quick question: H2 needs how much longer dwell time than CO? > > For many years I was locked into H2 formation as only a temperature > dependant disassociation, but this has been shown to be incorrect by > the continuous gas analysis we have been able to use for the > development programme in California. As we increased the output over > a range of bed depths, H2 dropped, while CO tended to increase. You > could always find a sweet spot for a chosen depth, but H2 formation > lagged if you pulled harder. ..right, we need black boxes to log everything we do. Ok, at least we get to keep our reputation on black art magic. ;o) > If you increase the bed depths to increase the contact/dwell time, > even by say 25mm, the H2 will increase, but then so does bed > resistances. Time taken has to be nano seconds, but as you have > discovered, a good sneeze can help maintain the bed porosity(:-) > > There are many ways to skin this cat, but the basics remain the same > based on the experience so far. It would be great if gas was only > made at a fixed output, then variations of every type could be > controlled. ..well, it's going to be "all over the country", and the mapping is going to look like it's been done with Obama's shot gun. ;o) > Doug Williams, > Fluidyne------ -- ..med vennlig hilsen = with Kind Regards from Arnt Karlsen ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
