The future of carbon materials is circular.

Kari Energy turns crop residues, processing waste and invasive biomass into engineered carbon materials and permanent carbon removal. Every tonne we make begins as biomass that would have been burned or discarded, and ends as carbon that works in soils, industries and energy systems for generations.

Explore our Reactors

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0.5–50 t

Reactor output, sized to your project

100%

Built in Coimbatore, Tamil Nadu

Verified

Removal aligned with Puro.earth and Isometric

Removal aligned with Puro.earth & Isometric

From biomass
to permanence

Biomass sourcing

Pyrolysis reactor

Carbon refinery

Digital MRV

Verified removal

How we source biomass

Every residue we collect gains a second life.

We source biomass that already exists: what is left after harvest, after processing and after clearing invasive plants. Each stream is weighed, geotagged and checked for eligibility at intake, so the carbon it becomes can be traced back to the field it came from. Burned in the open, its carbon returns to the air within hours, as smoke over farms and towns. Converted by Kari Energy, about half of that carbon is locked into stable carbon that lasts for centuries.

Plants capture CO₂

as crops, plantations and forests grow.

Residues are collected

after harvest, processing and clearing, before they are burned.

Kari reactors

convert the biomass into stable carbon.

The refinery

upgrades carbon into high-value materials.

Carbon goes to work

in soils, industry and energy storage.

Healthier soils

grow the next harvest, and the loop continues

grow the next harvest, and the loop continues.

Agricultural residues

Paddy straw, cotton stalk, maize cobs and pulse haulm, collected after harvest through farmer producer organisations.

Agro-processing waste

Coconut shell, rice husk, cashew shell and areca husk from processing units that would otherwise pay to dispose of them.

Agroforestry and plantations

Prunings, bamboo offcuts, coconut fronds and plantation residues from tree-crop systems.

Invasive species

Lantana camara, Prosopis juliflora and Senna spectabilis cleared from forests and grasslands under restoration plans.

Forestry residues

Thinnings, slash and harvest residues from managed forests and woodlots.

Urban green waste

Tree trimmings and park waste collected by municipalities and estates.

01 / INDIAN ENGINEERING

Your biomass. Your reactor.

Designed, fabricated and commissioned in Coimbatore. From a farmer collective to an industrial hub, we configure every line around your feedstock, site and carbon product.

CIRCULAR CARBON / KARI ENERGY

Engineered for permanence.

Size your reactor / carbon output

5tonnes / day

0.5 t50 t

16.7–20 tDry biomass input / day

1,500 tCarbon output / year

≈ 3,750 tCO₂eRemoval potential / year

Skid-mounted continuous line. Indicative at 300 operating days and 25–30% dry-feedstock yield. Removal applies only to durable storage, before verification and project deductions.

100% indigenous

Designed and built in India, with locally sourced fabrication and spares.

Coimbatore, Tamil Nadu

30+ years

Our technicians’ experience building carbonisation and carbon machinery.

Commissioning and operator training

0.5–50 tonnes

Output capacity configured to the feedstock, site and product you need.

Continuous feed and discharge

Continuous feed and discharge · Recovered process heat · Emission control · Multi-feedstock design · Digital MRV sensors · Commissioning and operator training

Discuss your reactor

Verified carbon credits

Engineered carbon removal, ready for offtake.

Our biochar locks carbon away for centuries. Every credit is issued only after the carbon has been produced, measured in the laboratory, placed in durable storage and checked by an independent verifier, under methodologies aligned with Puro.earth and Isometric.

1 CORC

= 1 tonne of CO₂ removed from the atmosphere and durably stored

CO₂ Removal Certificates are issued on the Puro Registry. Biochar certificates carry a durability label of 200 years and more under Puro.earth's 2025 biochar methodology.

1 CORC

= 1 tonne of CO₂ removed from the atmosphere and durably stored

CO₂ Removal Certificates are issued on the Puro Registry. Biochar certificates carry a durability label of 200 years and more under Puro.earth's 2025 biochar methodology.

Puro Standard
Biochar Methodology, Edition 2025
CORC200+ durability label for biochar
Biomass sourcing criteria checked at intake
Facility and output audits by an independent verifier
Isometric Standard
Biochar Production and Storage Protocol
Removal credits issued ex-post
Batch mass and carbon traced to the storage site
Modules for distributed and small-scale production

02 / MEASURED REMOVAL

A record behind every credit.

Produced. Measured. Stored. Independently verified. Explore how one batch becomes a serialised removal credit, and choose the partnership that fits your goals.

01 / 06

Produce

Biochar made in a registered reactor.

Explore each stage

CIRCULAR CARBON / KARI ENERGY

Produce

Spot purchase

Verified credits from batches already issued.

Forward offtake

Multi-year supply at agreed volumes and prices, from projects built for you.

Programme partnership

Removal projects inside your own value chain, with farmers and suppliers you already work with.

Puro Standard — Biochar Methodology, Edition 2025: CORC200+ durability label for biochar; biomass sourcing criteria checked at intake; facility and output audits by an independent verifier. Isometric Standard — Biochar Production and Storage Protocol: removal credits issued ex-post; batch mass and carbon traced to the storage site; modules for distributed and small-scale production. Puro.earth and Isometric identify the standards Kari Energy projects are designed to meet. Each framework certifies individual projects after independent verification.

Explore dMRV

Advanced carbon refinery

Carbon refined at the nanoscale.

Our refinery upgrades biochar into high-performance carbon materials. Each stage engineers the carbon's pores, surface chemistry and structure at the nanoscale for a specific industrial use, and every grade is tested before it ships.

03 / ADVANCED REFINING

Designed one pore at a time.

Grading, activation, surface chemistry and nanostructure turn biochar into high-performance materials. Select a stage to see how every grade is engineered and tested.

01 / 05

Grading and purification

Biochar is sized, washed and checked for consistency.

Explore each stage

CIRCULAR CARBON / KARI ENERGY

Grading and purification

Explore Carbon Energy

Our products

Carbon materials, made to specification.

Four product families from one platform. Every consignment ships with its laboratory certificate and the record of the batch, and the biomass it came from.

Biocoal

A dense, renewable solid fuel that replaces coal in boilers, kilns and co-firing. Specification: Calorific value · fixed carbon · ash.

Applications

Industrial boilers and kilns

Co-firing with coal

Captive heat and power

Biocoal

A dense, renewable solid fuel that replaces coal in boilers, kilns and co-firing. Specification: Calorific value · fixed carbon · ash.

Applications

Industrial boilers and kilns

Co-firing with coal

Captive heat and power

Biocoal

A dense, renewable solid fuel that replaces coal in boilers, kilns and co-firing. Specification: Calorific value · fixed carbon · ash.

Applications

Industrial boilers and kilns

Co-firing with coal

Captive heat and power

Functionalised biochar

Biochar with tailored surface chemistry and nutrient loading for soils and remediation. Specification: H/Corg < 0.7 · organic carbon · PAH and metals.

Applications

Soil health and water retention

Compost and growing media

Soil and water remediation

Functionalised biochar

Biochar with tailored surface chemistry and nutrient loading for soils and remediation. Specification: H/Corg < 0.7 · organic carbon · PAH and metals.

Applications

Soil health and water retention

Compost and growing media

Soil and water remediation

Functionalised biochar

Biochar with tailored surface chemistry and nutrient loading for soils and remediation. Specification: H/Corg < 0.7 · organic carbon · PAH and metals.

Applications

Soil health and water retention

Compost and growing media

Soil and water remediation

Activated nano carbon

An ultra-porous adsorbent with very high surface area for purification. Specification: Iodine number · BET surface area.

Applications

Drinking and waste water

Air and gas purification

Food and pharmaceuticals

Activated nano carbon

An ultra-porous adsorbent with very high surface area for purification. Specification: Iodine number · BET surface area.

Applications

Drinking and waste water

Air and gas purification

Food and pharmaceuticals

Activated nano carbon

An ultra-porous adsorbent with very high surface area for purification. Specification: Iodine number · BET surface area.

Applications

Drinking and waste water

Air and gas purification

Food and pharmaceuticals

Carbon energy materials

Engineered carbons for the next generation of batteries and energy devices. Specification: Electrochemical grade · tailored porosity.

Applications

Hard carbon for sodium-ion batteries

Supercapacitor electrodes

Conductive additives and catalyst supports

Carbon energy materials

Engineered carbons for the next generation of batteries and energy devices. Specification: Electrochemical grade · tailored porosity.

Applications

Hard carbon for sodium-ion batteries

Supercapacitor electrodes

Conductive additives and catalyst supports

Carbon energy materials

Engineered carbons for the next generation of batteries and energy devices. Specification: Electrochemical grade · tailored porosity.

Applications

Hard carbon for sodium-ion batteries

Supercapacitor electrodes

Conductive additives and catalyst supports

Partner with us

High-integrity carbon removal, built together

We build verified carbon removal projects with the people who hold the biomass and the companies that need durable removal. Each partnership runs on the same measured, auditable record.

Companies

Climate buyers

Contract verified, durable removal through spot purchase, forward offtake or a programme in your value chain.

Industry

Processors and mills

Host a Kari reactor, turn your waste streams into carbon products and use the surplus heat on site.

Agriculture

Farmers and FPOs

Sell your crop residues after harvest, receive biochar for your fields and share in the carbon value they create.

Government

The future of carbon materials is circular.

Every residue we collect gains a second life.

Every residue we collect gains a second life.

Every residue we collect gains a second life.

Plants capture CO₂

Residues are collected

Kari reactors

The refinery

Carbon goes to work

Healthier soils

Your biomass. Your reactor.

Your biomass. Your reactor.

Your biomass. Your reactor.

100% indigenous

30+ years

0.5–50 tonnes

Engineered carbon removal, ready for offtake.

Engineered carbon removal, ready for offtake.

1 CORC

1 CORC

= 1 tonne of CO₂ removed from the atmosphere and durably stored

1 CORC

= 1 tonne of CO₂ removed from the atmosphere and durably stored

Puro Standard

Biochar Methodology, Edition 2025

Isometric Standard

Biochar Production and Storage Protocol

A record behind every credit.

A record behind every credit.

A record behind every credit.

Produce

Spot purchase

Forward offtake

Programme partnership

Advanced carbon refinery

Advanced carbon refinery

Advanced carbon refinery

Carbon refined at the nanoscale.

Designed one pore at a time.

Designed one pore at a time.

Designed one pore at a time.

Grading and purification

Carbon materials, made to specification.

Biocoal

Biocoal

Biocoal

Functionalised biochar

Functionalised biochar

Functionalised biochar

Activated nano carbon

Activated nano carbon

Activated nano carbon

Carbon energy materials

Carbon energy materials

Carbon energy materials

High-integrity carbon removal, built together

High-integrity carbon removal, built together

Climate buyers

Climate buyers

Climate buyers

Contract verified, durable removal through spot purchase, forward offtake or a programme in your value chain.

Contract verified, durable removal through spot purchase, forward offtake or a programme in your value chain.

Processors and mills

Processors and mills

Processors and mills

Host a Kari reactor, turn your waste streams into carbon products and use the surplus heat on site.

Host a Kari reactor, turn your waste streams into carbon products and use the surplus heat on site.

Farmers and FPOs

Farmers and FPOs

Farmers and FPOs

Sell your crop residues after harvest, receive biochar for your fields and share in the carbon value they create.

Sell your crop residues after harvest, receive biochar for your fields and share in the carbon value they create.

Forests and restoration

Forests and restoration

Forests and restoration

Turn invasive species clearing into restoration finance, rural jobs and transparent public reporting.

Turn invasive species clearing into restoration finance, rural jobs and transparent public reporting.

Start a high-integrity carbon removal project.

Start a high-integrity carbon removal project.

Start a high-integrity carbon removal project.