[Bioconversion] They use the super critical water path!!

[Peter Singfield]

As was presented to the Gas list a feays agao -- and of course -- labeled
-- can't be -- it has to be a fraud!!

Here is how that shows up on a google search!!

The "meat":

"If you search well you should find the work going on in directly gasifying
biomass into liquid fuels -- in that case -- butane -- which is a portable
fuel you know!

Two reactors -- end to end -- biomass in -- butane out.

And under those pressures -- a liguid in a tank!

Butane is such a nice fuel"


 


Peter/Belize


****************appended****************

[Gasification] Supercritical Water Gasification of Biomass 
Peter Singfield snkm at btl.net 
Wed Oct 13 21:56:51 CDT 2004 

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Interestingly -- China is investigating super critical water gasification:

http://www.xjtu.edu.cn/en/staff&faculty/Instructors.EN/00476.htm


Also -- for those of you that might like to experiment in this domain but
wonder how you would ever make of find such a reaction vessle -- found this
company that does nothing but!

http://www.autoclaveengineers.com/index.asp?loc=/Supercritical_Fluid_Systems
/Supercritical_Water_Pressure_V/&title=Supercritical%20Water%20Pressure%20Ve
ssels


Cutting right to the chase -- 

Subcritical water & supercritical water oxidation (SCWO) equipment

Introduction

Supercritical water & subcritical water vessels are the preferred "green
chemistry" reactors for oxidation & hydrolysis. Oxidize waste chemicals
into H2O, CO2 & salts. Supercritical water oxidation (hydrothermal
oxidation) can be called incineration without the smokestack. Near critical
water's (NCW) unique solvent properties (both organic & ionic compounds
dissolve) makes it suitable as a replacement process solvent (low VOC) for
sustainable chemistry.

AE Closure offer pressure ratings to 7,800 psig (538 bar) @ a temperature
of 1,100°F (593°C)

INCONEL® 625, titanium , HASTELLOY® & exotic nickel based alloys are
offered for corrosion resistance

*********************

Or this model -- if you want to do commercial size from the get go:

Features

Operating Pressures to 45,000 psi (3,104 bar)


Temperatures to 1,000°F (538°C)


Inside Diameters to 45" (1143 mm) and Lengths to 50 Feet (13.7 Meters).
Specific sizes determined for each application


Various Closures Available Depending on Process Requirements


Metal or ceramic crucibles for high temperature applications


Control packages including data acquisition 


Internal or external furnaces


ASME CE, TUV or other applicable code stamps are available


Valve racks, pumping systems


Various materials of construction available depending on application 


*************************

They also sell pumps for this -- but suggest going with the cement pump
which is already proven for biomass slurries.

Re:

Conclusion
1.A semi-solid gel can be made from 4 wt %(or less)corn starch in water.
Wood sawdust and other particulate biomass can be mixed into this gel and
suspended herein, forming a thick paste. This paste is easily delivered to
a supercritical flow reactor by a cement pump.

Get the entire PDF on that deal at:

http://www.eere.energy.gov/hydrogenandfuelcells/pdfs/25315hh.pdf

and last -- from this same pdf:

Above the critical pressure of water, wood sawdust can be steam reformed
over a carbon catalyst to a gas composed entirely of hydrogen,carbon
dioxide,methane,and a trace of carbon monoxide. There are effectively no
tar or char byproducts.The liquid water effluent from the reactor has a low
TOC value,a neutral pH,and no color.This water can be recycled to the reactor.

Course everyone is chasing after the H@ dream -- making a rich methane
biogass using this same process is even easier. Less pressure -- less hight
temps.

Biomass "Natural" gas anyone??

But then -- would our older school gasifiers on this list be happy without
having the fun of fuel processing (drying it down to exactly such and such)

No work solving tar and char problems --

And having an exit pressure more than enough to charge present technology
natural gas transport vehicle tanks without needing a pump!!

Getting full rated power and efficiencies for existing engines --

Etc -- Etc --

Hell no -- that would be far to easy!!

Acknowledgments:

This work was supported by NREL/DOE under cooperative agreement
DE-FC36-94AL85804,
and the Coral Industries Endowment of the University of Hawaii at Manoa.

There you go -- invented in the US -- soon to be coming from China!

Well -- that is this years report on "Supercritical Water Gasification of
Biomass"

If you want a lot more -- just enter those exact words above -- inside the
quote marks -- into google search engine.

If you search well you should find the work going on in directly gasifying
biomass into liquid fuels -- in that case -- butane -- which is a portable
fuel you know!

Two reactors -- end to end -- biomass in -- butane out.

And under those pressures -- a liguid in a tank!

Butane is such a nice fuel. 


Peter -- Belize