Hi GF; what are FT reactions, please?
I don't understand why salt water is being proposed in this process.
Having the Carbon Dioxide vented off is highly anti-social, but at
least they are not pretending to copy the failed sequestration plan
of Weyburn, Saskatchewan.
Thanks for the news, Henri.
Bob Stuart
On 15-Feb-11, at 12:44 AM, GF wrote:
kevin.
I understand there are mines that have caught fire underground by
accident in the 1950's and are still burning with the oxygen being
produced by FT reactions at the seat of the fire.
GF
-----Original Message-----
From: Kevin <[email protected]>
To: Discussion of biomass pyrolysis and gasification
<[email protected]>
Sent: Mon, Feb 14, 2011 10:42 pm
Subject: Re: [Gasification] 300 Megawatt Power Plant
Dear GF
----- Original Message -----
From: GF
To: [email protected]
Sent: Monday, February 14, 2011 5:47 PM
Subject: Re: [Gasification] 300 Megawatt Power Plant
What happens to the chlorine component in the underground reaction.
when using salt water. Chlorine is really unfriendly to metals
including stainless steel.
what sort of conduit is to be used for conducting the hot product
to the surface for refinement?
# Very gfood question!! The presence of chlorine in a starved
oxygen combustion environment is likely to generate an
environmental disaster, with the chlorinated hydrocarbons that that
will almost certainly result.
# Underground gasification of coal is a really neat concept, but as
far as I know it doesn't work. See:
http://en.wikipedia.org/wiki/Underground_coal_gasification Many
people in many places have spent many dollars trying to get it to
work. After many tests, there does not appear to be a single
commercially successful Underground Coal Gasification project now,
or in the past.
# See their Website at http://swanhills-synfuels.com/ On their FAQ
page, http://swanhills-synfuels.com/iscg/faq/, they state:
"Gasification can compete effectively in high-cost energy
environments." This seems to say a lot.
Best wishes,
Kevin Chisholm
GF
-----Original Message-----
From: Henri Naths <[email protected]>
To: [email protected]
Sent: Mon, Feb 14, 2011 1:54 pm
Subject: [Gasification] 300 Megawatt Power Plant
Dear list and all
I believe there some techincal issues involved with this
gasification process. All comments are appreciated.
Thanks
Henri
$1.5 Billion Swan Hills Synfuels Project
was announced by the Alberta Government. This project will
manufacture clean synthetic gas from
deep coal deposits to fuel a new 300 Megawatt Power Plant to be
built at Whitecourt. This transformative project
is a whole new way to generate clean electricity, using Alberta's
vast, deep stranded coal reserves.
Whitecourt will have the Province's first clean power source !
In July 2010 Town Council approved the next 20 acre Phase of the
Hilltop Industrial area. Infrastructure work will commence
immediately in order to have lots available for early spring 2011
to support the growth form the above project. In addition Pembina
Pipelines announced the final approval of their NIPISI & MITSUE
pipeline projects in the Judy Creek area. They are expected to
provide 1,000 short term construction jobs.
In situ coal is converted into a gas by piping saline water and
pure oxygen down an injection well.
The resulting combustion, plus the steam created by it, converts
the coal into gas that flows up a production well to a surface gas-
separation plant.
The project will drill about 20 pairs of injection and production
wells.
“The gas is taken to a plant where the CO2 is removed,” said
Shaigec. (managing director for Swanhills Synfuels )
“We then have finished syngas, that is dispatched to a pipeline and
then to the generator.”
This low-carbon gas will be used to fuel a new 300 MW power plant
to be built near Whitecourt, Alberta.
Gasification History
Gasification was first developed in the 1800s and has been used
commercially throughout the world for more than 100 years. A
variety of industries have utilized the technology including
chemical production, fertilizer manufacturing, and electrical power
generation. Today, the majority of the operating gasification
plants worldwide are surface gasification plants designed to
produce chemicals, fuels, electricity, and fertilizers.
Gasification Market
As of 2008, there were 420 gasifiers at 140 facilities in operation
globally, the majority of these being surface gasification plants
(source – GTC). World gasification capacity is projected to grow by
more than 70% by 2015 with much of the growth occurring in Asia
(source – GTC). A number of factors contribute to a growing
interest in gasification, including volatile oil and natural gas
prices, more stringent environmental regulations, and a growing
consensus that CO2 management should be required in power
generation and energy production.
How does Gasification work?
Feedstock (for ISCG it is deep coal) is exposed to high temperature
and high pressure. In the presence of steam at these conditions a
series of chemical reactions occur which convert the feedstock into
syngas.
In the case of ISCG, this chemical conversion of the deep coal
happens in place in its original seam. The resultant syngas created
consists primarily of hydrogen, methane, carbon dioxide, and carbon
monoxide.
To create this chemical conversion, two wells are drilled into the
deep coal seam. A horizontal injection well is used to introduce
oxygen and water into the seam; the oxygen supports a limited and
controlled amount of combustion, raising the temperature of the
coal and boiling the water to generate steam.
The naturally existing deep underground pressure, along with the
elevated coal temperature and the presence of steam, together form
the right conditions to gasify the coal. The vertical production
well is used to conduct the raw syngas to the surface. Char and
ash, which are remnants of the original coal, remain deep underground.
Figure 1. ISCG Well Pair Schematic
The coal seam for ISCG development at the Swan Hills Synfuels site
is 1400 m beneath the surface, approximately 800 m below the Base
of Groundwater Protection (depth limit of fresh groundwater – below
this depth, groundwater is saline), eliminating potential for fresh
groundwater contamination. Saline water is used for injection into
the coal seam through the horizontal well, virtually eliminating
the need for fresh water in the ISCG process.
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