In the face of escalating climate concerns, businesses worldwide are increasingly looking toward carbon dioxide removal (CDR) solutions to offset emissions and achieve long-term sustainability goals. According to Inkwood Research, the global durable carbon dioxide removal (CDR) demand market is expected to grow at a CAGR of 11.47% during the forecast period 2030 to 2040.
Durable CDR technologies, designed to
sequester carbon for hundreds to thousands of years, provide viable strategies
for companies seeking to make a lasting impact on their carbon footprint.
In this guide, we explore the primary durable CDR
approaches—direct air capture (DAC), biochar production, and
mineralization—highlighting the pros, cons, and costs of each.
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We also closely analyze some real-life
examples where these implementations have been successful. By comparing these
solutions, we aim to help businesses across industries determine the most
suitable option for their unique needs.
1. Direct Air Capture
(DAC):
Direct air capture technology involves
extracting CO₂ directly from the atmosphere using
large-scale machinery. Companies like Climeworks and Carbon
Engineering are leading the DAC space, deploying systems that capture
CO₂ and either sequester it underground or
utilize it for commercial products like fuels and building
materials.
Pros:
·
Scalability: DAC systems can
be scaled depending on carbon capture needs, making them flexible for varying
levels of CO₂ removal.
·
Versatility: CO₂ captured via DAC can be permanently stored underground or repurposed,
which opens avenues for potential revenue.
·
High Carbon Removal Potential: DAC has the
potential to capture millions of tons of CO₂ annually, especially with advancements in renewable energy powering the
systems.
Cons:
·
Energy Intensive: DAC requires
significant energy, especially when using conventional power sources. For
instance, Climeworks’ Orca Plant in Iceland requires
geothermal energy to operate sustainably.
·
High Costs: Currently, DAC
is one of the more expensive CDR options, with costs averaging between $250 and $600 per
ton of CO₂ captured.
Aligning with this, Microsoft has
committed to using DAC as part of its ambitious goal to be carbon-negative
by 2030. The company has also partnered with Climeworks to
purchase DAC credits, illustrating how DAC aligns well with
technology-driven companies with large emissions reduction budgets.
For industries with significant carbon
footprints, like cement manufacturing and fossil fuel
companies, DAC provides an efficient way to offset emissions. For
instance, Occidental Petroleum partnered with Carbon
Engineering in August 2023 to
integrate DAC into its operations, aiming to become a net-zero oil producer
by 2040.
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2. Biochar
Production:
Biochar is a carbon-rich material produced
by heating organic biomass (like crop residues and forestry waste) in
a low-oxygen environment. This process, known as pyrolysis, locks
carbon into a stable form that, when added to soil, sequesters CO₂ while
improving soil health.
Pros:
·
Enhances Soil Health: Biochar
improves water retention, nutrient availability, and overall soil fertility,
which can be highly beneficial for agricultural sectors.
·
Lower Carbon Sequestration Cost: Biochar
production is relatively low-cost, averaging around $30 to $120 per
ton of CO₂.
·
Co-Benefits for Agriculture: Farmers and
agricultural businesses can enhance crop yields while also sequestering carbon.
Cons:
·
Limited Scale: Biochar’s
impact is geographically limited, requiring land for both biomass sourcing and
biochar application.
·
Dependence on Biomass Availability: The success of
biochar depends on access to biomass, which may be limited in certain regions
or industries.
Biochar is highly suitable for the
agricultural sector, forestry, and industries focused on regenerative land use
practices. Farmers and landowners can use biochar to boost crop yields,
creating a direct financial incentive. For example, Cool Planet, a
biochar company based in the United States, has partnered with farmers to
provide biochar as a soil amendment, showing improved crop yields and durable
carbon storage. This makes biochar appealing for businesses in the agribusiness
sector looking to enhance sustainability practices.
Cool Planet has successfully produced
biochar for large-scale agricultural use, partnering with agricultural
companies to sequester carbon while enhancing soil health. Likewise, in Kenya, a biochar initiative has
helped small-scale farmers increase crop yields by up to 20%, demonstrating
biochar’s potential in sustainable agriculture.
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3. Mineralization
Mineralization, or enhanced weathering,
involves reacting CO₂ with specific minerals (such as basalt
or olivine) to form stable carbonates. This process naturally occurs over long
geological timescales, but companies like CarbonCure and Heirloom have
developed methods to accelerate mineralization for rapid carbon capture.
Pros:
·
High Durability: Once CO₂ is mineralized, it is permanently stored as rock, making it one of the
most secure forms of carbon storage.
·
No Long-term Maintenance: Unlike other CDR
methods, mineralized carbon doesn’t require monitoring after sequestration.
·
Potential for Carbon-Intensive Industries: Mineralization
can be used in construction materials, allowing industries to integrate it into
existing processes.
Cons:
·
Geographical Limitations: Mineralization
requires specific minerals and geological conditions, making it less viable in
areas without access to suitable rock formations.
·
Slow Uptake in the Market: While promising,
mineralization remains less adopted commercially than other CDR methods.
Construction and infrastructure sectors
stand to benefit greatly from mineralization. CarbonCure Technologies, for instance,
supplies concrete producers with the ability to inject CO₂ into concrete, offering a viable CDR pathway for builders aiming to
reduce carbon footprints in urban infrastructure projects. This approach not
only sequesters carbon but also improves the strength of the concrete, making
it a dual-benefit solution for construction companies worldwide.
4. Afforestation and
Reforestation
Afforestation (creating new forests)
and reforestation (replanting forests) are natural and low-cost CDR methods.
Large-scale initiatives, such as the Trillion Trees Initiative,
highlight the potential of forests to sequester significant amounts of CO₂.
Afforestation projects align well with
companies in retail and food production looking for community-focused
sustainability strategies. Apple Inc, for example, has invested in
forest preservation to offset part of its carbon emissions and enhance global
biodiversity—a prime example of corporate commitment to ecosystem-based CDR.
The company introduced the Restore Fund, a nature-based carbon
removal initiative aimed at investing in projects that restore and protect
forests, grasslands, and wetlands.
Its initial investments in Brazil and Paraguay target
the restoration of 150,000 acres of sustainably certified
working forests and the protection of an additional 100,000 acres of
native ecosystems. These efforts are projected to remove 1 million
metric tons of carbon dioxide from the atmosphere annually by 2025.
Additionally, in April 2023, Apple announced that over 250 of
its manufacturing partners have committed to using 100% renewable
energy for Apple production by 2030. (Source)
Pros:
·
Low Cost: Generally inexpensive,
averaging $1 to $50 per ton of CO₂.
·
Ecosystem Benefits: Forests provide
biodiversity, water management, and erosion control.
·
Community Impact: Creates jobs
and can support local communities economically.
Cons:
·
Variable Durability: Forests are
susceptible to fires, pests, and land-use changes, which can compromise carbon
storage.
·
Slow Process: Afforestation
takes considerable time for newly planted trees to grow and mature, meaning it
can take decades before significant carbon storage and ecological benefits are
realized.
·
Land Use Complications: Competes with
land needed for agriculture and urban development, particularly in densely
populated regions.
Concluding
Reflections
Choosing the right durable CDR solution
requires a strategic alignment with industry needs, budget, and environmental
impact goals. For large-scale industrial emitters, DAC and mineralization
provide long-term durability but at higher costs, whereas biochar offers
cost-efficiency for agricultural sectors. Afforestation and reforestation can
serve as budget-friendly options for industries focused on biodiversity and
community impact.
As the need for carbon neutrality
intensifies, companies are encouraged to explore a blend of these approaches or
collaborate with CDR providers to meet their climate goals. With the right CDR
approach, businesses can not only offset their carbon footprint but also
contribute to a sustainable future.
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