Renewable & Low-Carbon Fuels: Ethanol

Fuel production from low-carbon feedstocks is energy intensive yet producers have limited options to lower carbon intensity to generate premium products and avoid carbon costs. Natural gas use is typically the largest portion of life cycle CO2 emissions. Direct electrification with renewables is a viable option but can only meet a small portion of total energy loads when the wind is blowing or sun is shining.

We help low-carbon fuel producers electrify heat in order to cut energy costs and lower the carbon-intensity of their fuel.


Without any process or feedstock changes, biofuels produced using Rondo heat and power double your CO2 savings per gallon.

Low Carbon Factory

Key Benefits

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Easy Integration

RHBs are designed to integrate seamlessly into both existing and new facilities, This RHB was installed and commissioned without causing a single hour of facility downtime.

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Lowest-Carbon Heat

The RHB can slash low-carbon fuel CI in half. Combined with DAC/CCUS, this can result in zero-carbon ethanol

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Lowest-Cost Heat

The RHB is delivering heat to Calgren on a Heat-as-a-Service (HaaS) basis, supplying energy at a cost per MMBtu lower than gas-fired heat. Rondo’s HaaS enables industrial producers to enjoy low and predictable energy costs without upfront capital.

Designed for your facility

Industry Challenges

Ethanol producers use natural gas to generate steam for the conversion of starches into fuel. 

This natural gas use is the largest single portion of ethanol’s life cycle CO2 emissions. An estimated 90 percent of energy used by ethanol producers is in the form of heat.

The Rondo Advantage

The Rondo Heat Battery can lower the carbon intensity of traditional biofuels like ethanol, biodiesel and renewable diesel by up to 50 percent.


Rondo Energy’s simple technology cuts ethanol CI scores by 40 percent or more now; unlocks large increases in value per gallon; and alongside carbon capture, offers a clear pathway for the ethanol industry to reach zero CI – unlocking billions of dollars in profitability annually.

Get Started

We try to promptly respond to all inquiries, but due to high demand, we recommend that those interested in purchasing RHBs for one or more of your facilities please fill out the below inquiry form to receive a priority space in our queue.

Rondo Heat Datasheet

Download the Rondo Heat Battery Data Sheet

To learn more about the Rondo Heat Battery product line, please download our data sheet here.