[Gasification] 300 Megawatt Power Plant
Bob Stuart
bobstuart at sasktel.net
Tue Feb 15 01:04:46 CST 2011
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 <kchisholm at ca.inter.net>
> To: Discussion of biomass pyrolysis and gasification
> <gasification at lists.bioenergylists.org>
> Sent: Mon, Feb 14, 2011 10:42 pm
> Subject: Re: [Gasification] 300 Megawatt Power Plant
>
> Dear GF
> ----- Original Message -----
> From: GF
> To: gasification at lists.bioenergylists.org
> 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 <c_hnaths at telusplanet.net>
> To: Gasification at bioenergylists.org
> 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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