[Gasification] Torrified woodchips as a gasifier fuel

[Thomas Reed]

Dear Rolf and All:

You won't need to have much experience for dual fuel in Otto Engines.  
The oxygen sensor plus injector combination makes "FlexFuel" simple.  
The problem is the A/F ratio, 14 for gasoline, 13 for 10% ethanol, 9 for 
E85 and 6 for pure methanol.  Producer gas is close to 1.5, so would be 
the most difficult, but in principle it is just an adjustment of the 
throttle plate and lots of vehicles have been converted to PG.  That's 
not the problem here.  (It's the TAR, silly.)

While only 10% of cars produced today are labeled "flex fuel", someone 
needs to investigate the range that all cars produced in the last decade 
can handle with  no (mostly) or very little problem. 

Onward,

TOM REED          BEF/BEC


Rolf Uhle wrote:
> John, in diesels this is commonly used and they call it dual fuel mode. In 
> german more precisely "Zündstrahlbetrieb" which means igniting beam mode.
> The ignition of a small amount of liqid fuel (+ 5 %) sparks the larger 
> amount of gas. Another advantage is that certain irregularities in gas 
> production  are evened out as well as it compensates a bit of the power 
> loss.
> I have no experience on dual fuel in otto engines, I guess that preparing a 
> siutable air/fuel mixture is not so easy. Also, it is not necessary due to 
> the fact that you have spark plugs which fire the ignition.
> Rolf
>
> ----- Original Message ----- 
> From: "john shelzi" <jshelzi at yahoo.com>
> To: "Discussion of biomass pyrolysis and gasification" 
> <gasification at listserv.repp.org>
> Sent: Thursday, August 02, 2007 7:56 PM
> Subject: Re: [Gasification] Torrified woodchips as a gasifier fuel
>
>
>   
>> Rolf, can a diesel run producer gas as well as WVO at the same time?, & 
>> for that matter, can a gasoline engine run gasoline, along with producer 
>> gas at the same time? John.
>>
>>
>> Rolf Uhle <energiesnaturals at gmx.de> wrote:
>>  Hallo Ken,
>> if your Lister produces soot running on wvo,check compression, timing and
>> iny.pressure. If it is very cold, preheat.
>> My 12/1 runs on very rough wvo several hours every day and there is no 
>> soot.
>> Odor, o.k.-- but this is still better than diesel fumes.(to me)
>> Anyway, my aim is to use the limited wvo as detonant for less limited
>> woodgas in a future.
>> Rolf
>> ----- Original Message ----- 
>> From: "Ken Boak"
>> To: "Discussion of biomass pyrolysis and gasification"
>>
>> Sent: Tuesday, July 31, 2007 7:54 PM
>> Subject: Re: [Gasification] Torrified woodchips as a gasifier fuel
>>
>>
>>     
>>> Rolf,
>>>
>>> Thanks for your comments.
>>>
>>> I will need to try the output exhaust of the Lister to see if it contains
>>> enough excess O2 to support combustion of the woodchips. Experimentation
>>> later this summer ought to identify whether there is any validity in 
>>> these
>>> methods.
>>>
>>> Despite the often overstated "renewable" nature of waste vegetable oil as
>>> the main fuel, there is no doubt that burning veg oil produces excess
>>> soot
>>> and often undesirable odours.
>>>
>>> Whilst I could qite easily eliminate my fossil fuel consumption by 
>>> burning
>>> about 2000 litres of waste vegetable oil per year in my CHP system, I am
>>> fully aware that this would only create unacceptable amounts of soot and
>>> undesirable exhaust fumes.
>>>
>>> I am looking for a way to filter this soot from the exhaust gases,
>>> eliminate the "oily" odour and passing through a bed of hot char to
>>> support
>>> drying and torrefaction of a batch o woodchips seems one approach.
>>> I also need some extra thermal energy. My house needs about 70kWh per day
>>> for 5 months of the winter. Whilst currently burning natural gas to
>>> provide
>>> this - I want to offset this, next winter with a gasifier and a woodstove
>>> boiler.
>>>
>>>
>>>
>>> Ken
>>>
>>>
>>>
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