CarboFlow

CarboFlow is Onnu's proprietary carbonization machine - designed and engineered with the aim to make pyrolysis commercially viable for more projects.

Why choose CarboFlow?

CarboFlow sets a new standard in carbonization technology, delivering unmatched value and performance for every project. Deploying several key innovations, it has been designed to maximize biochar production and increase automation to make sites more successful.

Affordable

Projects using CarboFlow achieve payback in half the time of other projects.

Versatile

CarboFlow is able to pyrolyze a broad range of feedstocks.

High-capacity

Throughput of up to 850 kg/hr, and easily scaled up or down.

Pyrolysis with ambition

CarboFlow uses an upright design where airflow keeps the lower carbonization chamber oxygen-free while syngas is combusted above, radiating heat downwards.

As an experienced project developer, Onnu understands that pyrolysis operations need to stack up financially. By increasing throughput, harnessing advanced automation and capturing green energy, plants using our technology can run efficiently and reliably which all leads to a financially sustainable operation.

Biomass
Pyrolysis
Green energy
Biochar
Carbon removal

How it works

Dried biomass feedstock enters the CarboFlow carbonization unit via a dual feed auger system. Rotary valves release measured quantities of the feedstock into the lower chamber. Here, in a high temperature, low-oxygen environment, the feedstock undergoes continuous pyrolysis and is transformed into biochar and syngas.

While the biochar is quenched and discharged into bunkers, the released syngas is passed into the upper chamber where it is combusted. The green energy from the hot flue gases is captured and can power heat applications or electricity generation through ORCs. The spent flue gases are then passed through a scrubbing system to ensure no harmful emissions are released into the atmosphere.

Typical process flow

Key specs

Engineered for efficiency, designed for impact - CarboFlow delivers consistent performance for any scale of pyrolysis project.

Single CarboFlow

Key machine specs
850
kg/h
Hourly feedstock input
(15% MC)
6,970
tonnes
Annual feedstock input
(15% MC)
30
kW
Electricity requirements
8,200
Annual operating hours
Output generated
1,540
tonnes
Biochar
Annual biochar production capacity
3,560
tCO2e
Carbon
Annual carbon removal capacity
152
kW
Electricity
Electricity generation (after parasitic load)
Or
1,900
kW
Heat
Heat generation

Dual Carboflow

Key machine specs
1,700
kg/h
Hourly feedstock input
(15% MC)
13,940
tonnes
Annual feedstock input
(15% MC)
60
kW
Electricity requirements
8,200
Annual operating hours
Output generated
3,080
tonnes
Biochar
Annual biochar production capacity
7,120
tCO2e
Carbon
Annual carbon removal capacity
380
kW
Electricity
Electricity generation (after parasitic load)
Or
3,800
kW
Heat
Heat generation

Quad Carboflow

Key machine specs
3,400
kg/h
Hourly feedstock input
(15% MC)
27,880
tonnes
Annual feedstock input
(15% MC)
120
kW
Electricity requirements
8,200
Annual operating hours
Output generated
6,160
tonnes
Biochar
Annual biochar production capacity
14,240
tCO2e
Carbon
Annual carbon removal capacity
912
kW
Electricity
Electricity generation (after parasitic load)
Or
7,600
kW
Heat
Heat generation

Want to discuss your pyrolysis project?

Our team can advise on site layout, feedstock viability, and how CarboFlow can help you
achieve your commercial and sustainability goals.

CarboFlow's features

Automation

Intelligent core, user-friendly touchscreens, real-time remote access - our software takes pyrolysis automation to the next level.

Find out more

Green energy capture

Turn heat and syngas into value with CarboFlow’s integrated energy recovery system, reducing waste and powering operations sustainably.

Find out more

Feedstock drive

CarboFlow's 20 auger drive system delivers uniform pyrolysis across diverse feedstocks, boosting efficiency, quality and consistency.

Find out more

MRV

Transform raw machine data into real-time intelligence and optimization insights, for verified, audit-ready carbon credit MRV reporting across every pyrolysis run.

Find out more

Minimize footprint, maximize throughput

Designed in a rectangular chamber with two side feeders, CarboFlow is modular with all components designed to fit into two standard containers. On-site assembly is straightforward, allowing for efficient delivery and commissioning, getting projects up and running sooner.

Our CarboFlow installs

BioCarbon Technology Asia

3100
tonnes
Annual biochar production capacity
5980
tCO2e
Annual carbon removing capacity
4.6
MW
Heat generation capacity
Learn more
Malaysia
Agricultural residue
BioCarbon Technology Asia

SEAD

1185
tonnes
Annual biochar production capacity
2757
tCO2e
Annual carbon removing capacity
1.4
MW
Heat generation capacity
Learn more
Malaysia
Bamboo

Whole plant solutions

Onnu can design and deliver the entire plant from feedstock in, to biochar out, adhering to the highest standards throughout.

This can include walking floors, conveyors, dryers, feed systems, heat exchangers, ORCs, scrubbers, cyclones and bagging systems as your project requires.

Extended Service Agreement

We have designed CarboFlow to ensure simplicity and practicality for clients to manage themselves. If you want to extend our involvement, beyond a standard warranty, our service package includes:

  • All spares and fitting
  • Pre-planned maintenance visits
  • Remote monitoring
  • Support hotline
  • Performance guarantees

Sustainable development goals

Pyrolysis operations contribute to 8 of the 17 sustainable development goals (SDGs).

Zero Hunger logo
Affordable and Clean Energy logo
Industry, innovation and Infrastructure logo
Sustainable Cities and Communities logo
Responsible Consumption Logo
Climate Action Logo
Life on Land logo

Want to discuss your pyrolysis project?

Our team can advise on site layout, feedstock viability, and how CarboFlow can help you
achieve your commercial and sustainability goals.