[Stoves] rice husk pellets

[Paul Olivier]

Richard,

I would question the statement that RHA contains about 85 to 90% amorphous
silica.
A significant proportion of it should be in crystalline form.

Paul


On Fri, Jun 14, 2013 at 11:05 AM, Richard Stanley
<rstanley at legacyfound.org>wrote:

> Paul.
>
> Answer is that I don't know, to all of your  questions Paul: It was not
> our focus at the time. The rice hulls that were being anerobically
> decomposed were an eyesore and a real danger to the kids in the area who
> would play on them, sometimes falling into deep caverns created by the
> collapse of the structure on decomposition  often with tragic results. As a
> result the use of that resource became somewhat taboo for the briquette
> maker   The silica  content in the ash of combusted rice husks is however
> relatively well known published figure.   Here is this citation from
> wikipedia..
>
>
> The densification  of rice hulls for the low pressure wet process we
> follow, making effective briquettes out of such requires that it is either
> made soft and "mashy" or so  fine as to serve as an infilling for a fibrous
> lattice work.
>
> Richard
>
> On Jun 13, 2013, at 6:57 PM, Paul Olivier wrote:
>
> Richard,
>
> I assume that we are still taking about rice hulls. I supposed that this
> pile of rice hulls is being decomposed anaerobically. If this is the case,
> do you know how much methane is being released? You talk about a high
> silica content ending up in the ash. Have you checked the composition of
> this ash?
>
>
> On Fri, Jun 14, 2013 at 8:47 AM, Legacy Mail <rstanley at legacyfound.org>wrote:
>
>> hi Trevor &Frank,
>> I am no expert on the stuff as it seems to vary considerably from what we
>> have seen in practice.   Where it is left to  decompose in huge multi acre
>> 50 ft tall mounds, (eg Mbale Uganda), you observe  a glutenous mass which
>> can work very well even with other granular solids (sawdust, charcoal
>> fines) right off the mound.  Take it off the fields dry (in such as Bamaco
>> Mali ) and it has to indeed be blended with softened fibrous material. In
>> either condition (whether gluten or fiber bound) the high silica generates
>> lots of ash.
>> Richard
>>
>>
>> Sent from my iPhone
>>
>> On Jun 12, 2013, at 22:11, mtrevor at ntamar.net wrote:
>>
>> I suspect the high silicacontnt and loose nature will not compact well.
>> However if macerated and retted, then mixed with other stuff--- then maybe.
>> I suspect Richard Stanley could provide more info
>>
>> Michael N Trevor
>>
>> Marshall Islands
>>
>>  ****
>>
>> _______________________________________________
>> Stoves mailing list
>>
>> to Send a Message to the list, use the email address
>> stoves at lists.bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>>
>> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>>
>> for more Biomass Cooking Stoves,  News and Information see our web site:
>> http://stoves.bioenergylists.org/
>>
>>
>> _______________________________________________
>> Stoves mailing list
>>
>> to Send a Message to the list, use the email address
>> stoves at lists.bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>>
>> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>>
>> for more Biomass Cooking Stoves,  News and Information see our web site:
>> http://stoves.bioenergylists.org/
>>
>>
>>
>
>
> --
> Paul A. Olivier PhD
> 26/5 Phu Dong Thien Vuong
> Dalat
> Vietnam
>
> Louisiana telephone: 1-337-447-4124 (rings Vietnam)
> Mobile: 090-694-1573 (in Vietnam)
> Skype address: Xpolivier
> http://www.esrla.com/
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
>
>
>
> _______________________________________________
> Stoves mailing list
>
> to Send a Message to the list, use the email address
> stoves at lists.bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
>
> for more Biomass Cooking Stoves,  News and Information see our web site:
> http://stoves.bioenergylists.org/
>
>
>


-- 
Paul A. Olivier PhD
26/5 Phu Dong Thien Vuong
Dalat
Vietnam

Louisiana telephone: 1-337-447-4124 (rings Vietnam)
Mobile: 090-694-1573 (in Vietnam)
Skype address: Xpolivier
http://www.esrla.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130614/8c7883e7/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screen shot 2013-06-13 at 8.40.52 PM.png
Type: image/png
Size: 47823 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130614/8c7883e7/attachment.png>