[Gasification] Universal Catalyst

[Thomas Reed]

Dear All:

"Tars" sure are the Achilles Heel of biomass gasification, since biomass 
is typically >30% volatiles with slow pyrolysis.  Those volatiles formed 
the basis of the development of organic chemistry from 1850-1950.  There 
are over 50 compounds at greater than 1% in the liquors and tars.  Great 
for chemistry but bad for gasification. 

In the 1980s many people pursued "catalytic tar destruction" and we made 
tests on a number of catalysts while developing our oxygen gasifier at 
SRI/NREL.  Dolomite was claimed by many Europeans to be a great and 
cheap catalyst for tar destruction.  It was the bottom of our list of 
half a dozen catalysts we tried.  I was very puzzled.  Is European 
Dolomite different from US? 

I haven't heard much about dolomite recently. 

Any updates?

TOM REED          BEF



jim mason wrote:
>> It no longer sports the universal
>> catalyst that it started with.
>>
>> Tom Miles
>>
>>     
>
> can you explain this tom?  does this mean it was using dolomite for
> tar cracking?
>
> j
>
>
>
>   
>> -----Original Message-----
>> From: Thomas Reed
>> Sent: Wednesday, August 01, 2007 6:01 AM
>> Subject: Re: [Gasification] 5KW Ngen Gasifier Genset
>>
>> Dear Jeff and All:
>>
>> I have just ordered the Mother Earth plans.
>>
>> *We* took part in a coast to coast alternate energy rally about 1981
>> (bicentenial of Battle of Yorktown, so I re-enacted the battle while our
>> team drove my Mazda GLD pure methanol car).  There were three memorable
>> gasifiers in that race:
>>
>> The Mother Earth News Gasifier
>> The Ben Russell Gasifier (shown in our book, Producer Gas)
>> The Chittick Gasifier (used to cook hot dogs for the particpants every
>> night)
>>
>> I believe all three gasifiers made it coast to coast, and our methanol
>> car sure did.  I hope Tom Miles can give us a repris on the Chittick
>> Gasifier.
>>
>> In retrospect I wish I had been on the rally rather than winning the
>> Battle of Yorktown (again).
>>
>> There are some advantages to being older (but not old)...
>>
>> Your older Gasifist
>>
>> TOM REED
>>
>> Jeff Davis wrote:
>>     
>>> Dear Sir,
>>>
>>> Below you will find plans to a working gasifier:
>>> http://www.motherearthshopping.com/detail.aspx?ItemNumber=762
>>>
>>> PLEASE use dry wood!
>>>
>>> I have a Belarus 525, great tractor. Sure can see a lot of the old designs
>>> in this machine. Wonderful engine but it is indirect injected so it would
>>> have problems with woodgas.
>>>
>>>
>>> Best regards,
>>>
>>>
>>> Jeff
>>>
>>>
>>>
>>>
>>>       
>>>> any body has any plans on old german gasifiers hmm  .
>>>> imbert to the small ones used on volks =wagens ..
>>>> there tractor made by bearrus tractors and can run on allmost everthing .
>>>> peanut oil too  any help would be great
>>>>
>>>>         
>>>
>>>       
>> --
>> ÐÏ à¡± á
>>
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>>     
>
>
>   

-- 
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