How can you make more out of your biogenic co2 Episode 2 - Paper Technology International 2023 - Paper Technology International 2023 - Flipbook - Page 99

How can you make more out of your biogenic co2 Episode 2 - Paper Technology International 2023

PAPERTECHNOLOGYINTERNATIONAL - How can you make more out of your biogenic co2 Episode 2 - Paper Technology International 2023
Integration into Pulp & Paper Mills
Coming back to the symbiosis
of the Pulp Mill and e-fuel based
methanol production: It is not enough
just to utilize biogenic CO2 from the
pulp mill and subsequently e-methanol
for the mill’s truck fleet or shipping
vessels for shipment. It is a symbiosis
to use the surplus of the pulp mill´s
biogenic electrical power and heat,
the existing units for demineralized
water supply and effluent treatment,
also the surplus of oxygen from
the electrolyzers and heat from the
methanol facility. These can be used
for the pulp mill´s bleaching and
effluent treatment process, to skip the
energy intensive air liquefaction on
site and to generate a net of balance,
as well as the bio-methanol/methanol route as part of the black
liquor evaporation refinery step ahead of the recovery boiler. With
the pulp and e-methanol production symbiosis the whole production
could work as carbon neutral, due to the replacement of the natural
gas fired lime kiln with e-methanol. (table 1)
A pulp mill with 1.5 Million tons pulp production for instance
shows that a fifth of e-methanol production, based on excess
electrical power production from the pulp mill, could cover the lime
kiln process (pulp mill methanol production not considered). With
that move carbon credits become obsolete.
The rest of the produced eMethanol can either be used for
the mill’s own logistics (replacing diesel from trucks, shipping fuel,
etc.) or can be sold on the rapidly growing market for eMethanol
(CO2 neutral Methanol), the demand in the shipping industry is very
high indeed.
Table 1: Adiabatic flame temperature, flame length, and kiln
parameter for alternative fuel source (Ivarsson, C. and Svendiv,
K., “Study of the lime reburning process with biofuels,” TAPPI/
PAPTAC Int. Chem. Recovery Conf., TAPPI/PAPTAC, Peachtree
Corners/Brossard, QC, Canada, 2007.)
I hope Episode 2 of “How can you make more out of your
biogenic CO2?” and the Liquid Wind approach with their Flagships
makes you curious enough to think about how you can make an
already highly sustainable sector, like the Pulp & Paper Industry,
even more sustainable. And not to forget the opportunity the Pulp
& Paper Industry now has to become an active part of the rapidly
rising market for green fuels. Last, but not least, and out of my own
experience of working for the last four years in this new industry, it’s
a great feeling to be part of this fantastic initiative to help fight the
threats of global warming, we all have to do more, and drop by drop
green fuels will very much help to make a difference.
Figure 3: Carbon Neutral Fuel by using green electricity and biogenic CO2 from almost carbon neutral pulp mills.
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