Clean Energy
from the Sun

As a full service supplier, SunGas designs, fabricates delivers and commissions complete gasification systems for your project

SunGas provides proven gasification systems that transform woody biomass into the building blocks necessary for large scale production of renewable fuels and chemicals.

The SunGas gasification process produces at industrial scale clean, tar-free syngas essential for the production of gaseous and liquid biofuels, and biochemicals.

Commercially Proven
Guaranteed Performance
Clean Synthesis-Ready Syngas

Wood Yard and a Bio Syngas Facility with a Plant Worker

Convert wood processing or power facilities into biofuel production sites

SunGas can help transform existing and closed wood processing or power facilities into renewable fuel production sites that create almost zero localized air emissions while producing industrial scale amounts of biofuels including renewable natural gas, hydrogen, gasoline, diesel, jet fuel, methanol or biochemicals.

The SunGas gasification island provides the reliable and clean syngas needed to ensure biofuel production facilities meet their production goals by reducing down time and eliminating unwanted tars or oils.


less conventional air
pollutants than the existing
production facilities

SunGas is accessing biomass conversion, gas quality, clean-up, and processing know how and technologies from GTI

In the News

SunGas Renewables will be working with Arbor Gas to accelerate the U.S. transition to low carbon fuels!

Arbor Renewable Gas, LLC Secures Capital Commitment from EnCap Investments L.P. Leader in industrial scale woody biomass to renewable gasoline and green hydrogen projects to decarbonize transportation fuels HOUSTON, Texas...

SunGas Renewables Announces New CEO

September 1, 2020 Des Plaines, IL Today, Robert Rigdon officially begins his tenure as the CEO of SunGas Renewables, a full-service supplier that designs, fabricates, delivers, and commissions complete gasification...

SunGas Renewables Announces Key Addition to Leadership

July 31, 2020 Des Plaines, IL SunGas Renewables (SunGas) announces the appointment of Andrew Kramer as Vice President of Engineering. Andrew brings critical experience and leadership to the SunGas team...

Dawn of a New Decade: New Report Delves into GTI’s Vision for Low-Cost, Low-Carbon Energy Systems

GTI’s latest annual report spotlights our initiatives and technologies that are enabling transformations in global energy systems. As you look through the report, you are encouraged to click on the...

Our Leadership

Robert Rigdon

Robert Rigdon




David C. LaMont, Ph.D.

Senior Vice President
Business Operations


Dan LeFevers

Daniel S. LeFevers

Vice President
Business Development


Andrew Kramer

Andrew Kramer

Vice President
Project Implementation


Informational Resources

Please download these Renewable Natural Gas (RNG)-related presentations, reports, and brochures.

SunGas Renewables — Harnessing Clean Energy from the Sun


SunGas Renewables Gasification Island

Data Sheet

SunGas Gasification Technology Overview


Low-Carbon Renewable Natural Gas (RNG) from Wood Wastes

Site Specific Engineering Design Study

For more information, please contact us.

We welcome your inquiries for development of project opportunities or additional information.

Contact Us

Robert Rigdon

Mr. Rigdon brings decades of executive leadership to SunGas and has unparalleled experience leading the deployment of gasification systems globally.

From 2008 to 2020, Mr. Rigdon held executive leadership positions including the President and CEO at Synthesis Energy Systems, Inc., (SES) where he was responsible for overseeing the commercialization, implementation, and operation of SES’s gasification projects worldwide.

Under his leadership, SES commercialized gasification technology based on U-Gas® technology licensed from GTI. He played an integral role in establishing multiple business enterprises in China, which completed five industrial scale-gasification projects between 2008 and 2016, and established gasification technology and equity business platforms in Australia and Europe.

Prior to SES, Mr. Rigdon held senior positions in GE’s gasification business in a variety of capacities, and held positions of increasing responsibility in chemical manufacturing operations and development, construction, and start-up of large-scale facilities at Texaco. He has a Mechanical Engineer with a B.S. degree from Lamar University in Beaumont, Texas.

David C. LaMont, Ph.D.
Senior Vice President Business Operations

Dr. LaMont is a recognized expert in thermal conversion energy technologies and has nearly two decades of experience in technology assessment, deployment and financing. Most recently, he led the technology commercialization group at GTI that created and spun out SunGas. Previously, he worked for 10 years in the global energy business for ConocoPhillips, leading efforts in business and technology analysis, large scale technology deployment and strategy and planning. He has also held roles in in two hydrogen and fuel cell technology startup companies. Dr. LaMont has a Ph.D. in chemical engineering from Washington State University and an MBA from the Kellogg School of Management at Northwestern University.

Daniel S. LeFevers
Vice President Business Development

Mr. LeFevers leads SunGas Renewable’s business development activities and has a 30-year career in the energy business working for a an Illinois utility focused on alternative fuel use in transportation, with Gas Technology Institute (GTI) in project and program development and with a privately held waste company in governmental affairs in Washington DC. Mr. LeFevers was one of the original GTI staff that helped to create SunGas Renewables which provides to the market a gasification syngas delivery system based on GTI developed technology. He has extensive governmental affairs experience in various States and in Washington D.C. and has collaborated with scientists and engineers to deploy energy technologies in projects throughout the United States. Mr. LeFevers has held various roles in business development and governmental affairs at Peoples Energy, Waste Management and GTI. He also led development and project efforts for a site-specific engineering design for an RNG production facility fueled by wood wastes. Mr. LeFevers has a BA in Speech Communication and MA in Organizational Leadership.

Andrew Kramer
Vice President Project Implementation

Mr. Kramer brings critical experience to the SunGas team with his years of experience directing the design, installation, and operation of U-GAS® gasification technology, which is the core technology in SunGas’ fluidized bed gasification product.

As Senior Director for GTI, he has overseen all aspects of design, installation, operation, and maintenance of GTI’s pilot-scale gasification and related facilities including fuel feeding, gas feeding, syngas cleaning, conditioning, and end-use systems. Mr. Kramer has deep knowledge of multiple gasification technologies using a variety of woody biomass feedstocks, and has been involved in integration of gasification technology in gas-to-liquid conversions processes, including the TIGAS™ (Topsoe Improved Gasoline Synthesis) process, Fischer-Tropsch, and methanation systems.

Mr. Kramer was also responsible for corporate safety at GTI. He has a bachelor’s degree in chemical engineering from Tri-State University in Angola, Indiana.