POWER December 2021 - 7

GLOBAL MONITOR
ing upwards of 3 million tonnes of annual CO2
reductions. " Capital
has said the utility thinks " a combination of technologies will
be necessary to achieve our goal of being net carbon neutral by
2050. DAC is a promising technology that will support our decarbonization
efforts by physically reducing emissions across our
portfolio. DAC complements the other technologies in our portfolio
and offers the potential to reduce emissions from our facilities
that may otherwise have limited opportunities for decarbonization
due to technical or economic limitations. "
The repowering of Units 1 and 2 also will provide an additional
560 MW of generation capacity from those units, which today
have 860 MW of total capacity. Unit 2 was commissioned in
1989; Unit 1 came online in 1994. Capital Power said that based
on the NGCC repowering project schedule, Genesee 1 would
become a dedicated NGCC unit in 2023; Genesee 2 would become
a dedicated NGCC unit by 2024. That would mean the
three units at Genesee would end their use of coal in the next
two years, well ahead of the Canadian government's mandate to
end coal-fired power generation in the country by 2030.
Delta CleanTech had commercial carbon capture technology available
as early as 2005, and participated in several projects over the
next few years before the global financial crisis shelved much of the
interest in CCS. The company optimized its technology in the intervening
years, and has seen renewed interest in its services as interest
in CCUS has been revived as part of environmental, social, and
governance initiatives in the energy industry. An increase in coal-togas
switching, along with efforts by utilities to reduce carbon emissions,
has provided opportunities to deploy the group's system.
Allison said the fabricating partner for his company's technology
is ALCO Oil and Gas, a longtime Alberta-based services and
manufacturing company serving the energy industry. " Delta
CleanTech's technology is fabricated in a factory setting, making
it possible to reduce capex [capital expenditure] costs and
enable a quick setup, " he said. " We build our plant using skidmounted,
modular oil field technology, with off-the-shelf blowers,
heat exchangers, pumps, and other components. "
Allison said Delta CleanTech " used multiple design tools including
its process design PDOEngine to invent a solution that
is able to accommodate both [coal and natural gas]. To achieve
this, we needed to figure out how to deal with the different compositions
of each flue gas. The coal-fired flue gas has a high CO2
concentration, while the natural gas-fired flue gas has a smaller
CO2
concentration, making the required flue gas volume three
times higher for the natural gas case than it would be for the
coal case. With this technology, both plants can match the operating
data with less than ±5% average absolute deviation. The
captured CO2
, which contains more than 99.9 mol% dry ... is
suitable for manufacturing carbon nanotubes. "
Allison told POWER the carbon nanotubes could be used in
the concrete industry, where the CNTs could improve the mechanical
properties of the material, including tensile and bond
strengths. He said the captured CO2
-already used in enhanced
oil recovery operations-would have many uses, noting, " today
there are many new technologies that offer broader commercial
applications for captured CO2
, such as the production of methanol/ethanol,
the production of bioplastics, and more. " Allison
said the technology " means that more emitters can begin reducing
their emissions more quickly and affordably to mitigate
their environmental impact while also reducing costs associated
with carbon taxes. " Canada's carbon tax is planned to increase
to $170/tonne by 2030 and individual provinces have the authority
to increase this further.
-Darrell Proctor is a senior associate editor for POWER.
December 2021 | POWER
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POWER December 2021

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