Carbon Sequestration

What Carbon Sequestration does

Carbon Sequestration Inc. (CSI) is a Houston-based, privately held nature-based carbon removal company founded in 2019 by Christopher Knop. CSI's core technology is the permanent underground burial of woody biomass in engineered vaults — large excavations (approximately 300 × 300 feet, over 12 feet deep) within the dense, low-permeability, high-plasticity clay of the Lissie Formation at its Hardin County, Texas flagship site, sealed with 6–12 ft compacted native clay caps to create oxygen-free, watertight environments designed to lock carbon underground for over 1,000 years. The company supports this physical sequestration with a multi-modal MRV (Monitoring, Reporting, Verification) stack that includes an embedded gas monitoring system using NDIR sensors for quarterly CO2 and CH4 measurements, biomass moisture and species logging at intake, periodic direct excavation sampling, and drone-based site surveying.

CSI monetizes the sequestered carbon primarily through the sale of Puro.earth-certified Carbon Dioxide Removal Credits (CORCs) generated under its Terrestrial Storage of Biomass method; a 2022 pilot sale of 1,100 metric tons at $126 per ton was followed by an in-progress delivery of an additional 4,500 CORCs and a signed November 2024 purchase agreement for 3,000 CORCs with an undisclosed enterprise buyer. Ancillary revenue streams include the sale or reuse of surplus excavated clays and subsoils for floodplain uplift, landscaping, and site improvement. Beyond core credit sales, CSI markets adjacent use cases built on the same vaulting technology: 100-ft Fire Prevention Corridors, agricultural burn prevention, floodplain carbon removal with buildable land creation, and Hugelkultur-based desertified land restoration. The company is regulatory-aligned with TCEQ, ICROA, ICVCM, and Texas HB 3060, and operates as a small team (11–50 employees) serving climate-conscious enterprises, forestry and timber companies, agricultural operations, and land developers in the United States.

Name

Carbon Sequestration

Legal name

Carbon Sequestration Inc.

Website

https://carbonsequestration-inc.com

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

11–50 employees

Short description

Carbon Sequestration Inc. is a Houston-based nature-based carbon removal company that permanently sequesters woody biomass underground in clay-sealed engineered vaults at its Hardin County, TX site, selling Puro.earth-certified Carbon Dioxide Removal Credits to enterprise climate buyers while serving forestry, agricultural, and land-development customers.

Ownership category

akta.pro rank

Product category

Carbon Removal Services

NAICS

Waste Management and Remediation Services (562)

SIC

Refuse Systems (4953)

akta.pro primary industry

Biomass Carbon Removal & Storage (BECCS/Biomass Burial) (EUABABAI)

akta.pro secondary industries

Carbon Removal Project Development, Financing & Offtake (Developers, Aggregators, Buyers Clubs) (EUABAFAL), Carbon Removal Measurement, Monitoring & Verification (Removal MRV & Durability) (EUABAFAK)

Keywords

• Carbon removal credits
• Woody biomass burial
• Terrestrial carbon storage
• Carbon sequestration vaults
• Carbon MRV services

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Personnel, Infrastructure, Technology or R&D, Supply Chain, Marketing or Sales

Revenue model

1. Carbon Removal Credits (CORCs): CSI generates revenue by selling Carbon Dioxide Removal Certificates (CORCs) generated from permanent wood burial projects. Credits are certified by Puro.earth and sold through direct purchase agreements to buyers seeking permanent carbon removal solutions. Pilot project sold 1,100 tCO₂ at $126/ton, with 3,000 credit purchase agreement signed.
2. Surplus Clay and Excavated Soil Sales: Excess soils from excavation (primarily geologic clays and sandy subsoils) are used for floodplain uplift, site improvement, landscaping, or sold for other projects, generating additional revenue streams.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Carbon Sequestration Inc. permanently removes atmospheric CO2 by burying woody biomass from forestry and agricultural operations in engineered underground vaults (~300×300 ft, >12 ft deep) sealed with native Lissie Formation high-plasticity clay caps (6–12 ft) that create oxygen-limited, watertight environments designed to store carbon for over 1,000 years. Each ton of CO2 removed is quantified through a Puro.earth-certified MRV system combining biomass assessment, dual decomposition monitoring (gas monitoring plus periodic excavation), and IPCC-aligned life cycle accounting with a 10–15% uncertainty buffer. The company sells the resulting verified Carbon Dioxide Removal Credits (CORCs) directly to climate-conscious enterprises, with ancillary value delivered through floodplain uplift, fire prevention corridors, and land restoration.

Product overview

Carbon Sequestration Inc. (CSI) is a nature-based carbon removal company offering a suite of solutions centered on woody biomass burial in engineered underground vaults. The core product, Woody Biomass Burial/Carbon Vaults, works in conjunction with the MRV (Monitoring, Reporting, Verification) system to deliver independently validated carbon removal. CSI generates Puro.earth-certified Carbon Dioxide Removal Credits (CORCs) through its Terrestrial Storage of Biomass method. The company also offers specialized solutions including Fire Prevention Corridors, Burn Prevention for Agriculture, Floodplain Carbon Removal, and Hugelkultur-based Desertified Land Restoration, all leveraging the same fundamental wood burial technology with applications tailored to different environmental challenges.

Differentiator

Problem solved

Functional benefit

Products and services

• Woody Biomass Burial / Carbon Vaults Engineered service that buries woody forest and timber residues in sealed underground vaults, permanently removing carbon from the atmosphere for over 1,000 years. Targeted at forestry/timber suppliers and delivered in conjunction with CSI's MRV and CORC generation pipeline.
• Terrestrial Storage of Biomass (Puro.earth-certified method) Puro.earth-certified methodology that locks carbon-rich wood underground in clay-sealed vaults, generating verified Carbon Dioxide Removal Credits (CORCs) that CSI sells to climate-conscious enterprise buyers.
• Carbon Dioxide Removal Credits (CORCs) Permanent, Puro.earth-verified carbon removal credits (CORCs) sold through direct purchase agreements to corporate and government buyers. Pilot priced at $126 per ton of CO2 removed; pricing negotiated by volume (e.g., 3,000-CORC agreement).
• Fire Prevention Corridors Service creating 100-foot-wide firebreaks by removing and burying forest residues, slowing wildfires, protecting communities, and permanently storing carbon in CSI's vaults.
• Agricultural Burn Prevention Service Service that buries agricultural woody residues in CSI vaults instead of allowing them to be burned, preventing air pollution and generating durable carbon removal credits for farms and agricultural operations.
• Floodplain Carbon Removal & Buildable Land Service Service using wood burial in flood-prone areas; excavated soil is raised to create safe, developable land while permanently storing carbon for centuries. Targets land developers and municipalities in flood-prone regions.
• Hugelkultur / Desertified Land Restoration Service Service combining wood burial with hugelkultur mounding in arid or degraded areas to restore soil fertility, retain moisture, and help native plants thrive.

Quantifiable outcome

• Net carbon removal exceeding 4,800 tonnes CO₂e per vault over 100 years
• +3 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Puro.earthcoreStrategic or Co-development Partner · 1 January 2022CSI's carbon removal methodology earned Puro.earth certification in 2022, validating their Terrestrial Storage of Biomass method against global carbon removal standards. Puro.earth provides independent third-party verification of carbon removal credits.
• Carbon Business CouncilcoreStrategic or Co-development PartnerCSI is a Founding Member of the Carbon Business Council, an industry association for carbon removal companies.
• AIChE Climate Solutions CommunityminorStrategic or Co-development PartnerCSI is a member of the AIChE (American Institute of Chemical Engineers) Climate Solutions Community.
• TSB CoalitioncoreStrategic or Co-development PartnerCSI works with The TSB Coalition as contractors and advisors for their carbon removal projects.
• Geoclime, LLCcoreImplementation/ SI/ Consulting PartnerProvides soil geology and geotechnical expertise for vault site assessment and construction.
• Ecofor, LLCcoreImplementation/ SI/ Consulting PartnerProvides life cycle analyses for carbon accounting and environmental impact assessment.
• KDW, Ltd.coreImplementation/ SI/ Consulting PartnerProvides pit architecture, engineering, and construction services for vault design and building.
• Burton Land ManagementcoreChannel Partner/ Reseller/ DistributorAcquires slash (woody debris) from forestry operations for use in CSI's carbon sequestration vaults.
• Gary Whitman Materials, Inc.minorImplementation/ SI/ Consulting PartnerProvides material sourcing for construction and vault stabilization needs.
• Dr. Ning ZengcoreStrategic or Co-development PartnerLeading scientist in carbon sequestration research. CSI Founder Christopher Knop collaborated with Dr. Zeng starting in 2019, with the partnership sparking new ideas and innovations in carbon sequestration methodology.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Climeworks: Climeworks is the largest pure-play DAC company globally, with multi-megaton capacity plans and major corporate backing. As a broad incumbent in the durable CDR market, it competes with CSI for enterprise offtake agreements and sets market expectations on durable CDR pricing and quality.

Others

• Puro.earth: Puro.earth is the leading carbon removal certification body and marketplace that verifies and brokers CSI's CORCs. While not a competitor, it is the central infrastructure layer through which CSI monetizes its credits and is therefore a critical ecosystem participant.
• Carbon Business Council: The Carbon Business Council is the industry association for CDR companies of which CSI is a founding member. It shapes voluntary market standards, policy advocacy, and buyer education — directly affecting demand and pricing for CSI's credits.

Direct peers

• Charm Industrial: Charm Industrial is the closest direct peer — it sequesters biomass carbon through pyrolysis and underground injection rather than burial. Both companies convert waste biomass into durable CDR credits and sell into the voluntary high-integrity market, serving the same enterprise buyer pool with similar credit pricing.
• Biochar Now: Biochar Now produces biochar from forest waste for agricultural soil amendment and carbon credits, holding Puro.earth certification. It competes with CSI for the same biomass waste feedstock and the same voluntary carbon credit buyer base, though via pyrolysis rather than direct burial.
• Carbofex: Carbofex produces biochar for carbon removal from woody biomass using pyrolysis. Like CSI, it sells Puro.earth-certified durable carbon removal credits to enterprise buyers, competing directly in the biochar/biomass-based durable CDR segment with similar pricing.
• Pacific Biochar: Pacific Biochar is a US-based biochar producer selling into agricultural and carbon removal markets. It targets biomass waste streams similar to CSI's and competes in the same Puro.earth-certified durable CDR category with comparable per-ton pricing.

Emerging players

• CarbonCapture Inc. CarbonCapture Inc. is developing large-scale DAC projects and partners with project developers across durable CDR pathways. It represents both a competing CDR supplier and a potential distribution/partner channel for CSI given the shared enterprise buyer pool.
• Heirloom Carbon: Heirloom uses limestone-based DAC technology to capture CO2 and mineralize it into concrete — a competing durable CDR pathway. While the technology stack differs (DAC vs. biomass burial), both companies target the same enterprise buyers seeking 1,000-year+ verifiable removal at premium pricing.
• Carbonscape: Carbonscape develops biomass-to-biochar CDR technology targeting large-scale forest waste streams. Like CSI, it converts woody biomass into durable carbon storage, but via pyrolysis rather than direct burial, placing it in an adjacent competitive niche.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks3 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/co2futures
• LinkedInlinkedin.com/company/carbon-sequestration-inc

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Carbon Sequestration