Fuel Tech, Inc. (NASDAQ:FTEK), a technology company providing advanced engineering solutions for the optimization of combustion systems, emissions control, and water treatment in utility and industrial applications, today released a white paper validating the oxygen transfer efficiency of its DGI™ Dissolved Gas Infusion technology. The paper, entitled "Validation Testing of the Fuel Tech, Inc. Dissolved Gas Infusion Technology for Oxygen Transfer Efficiency in Clean Water," is available at Fuel Tech's website at www.ftek.com, or directly via our DGI product page at www.dissolvedgasinfusion.com.

Fuel Tech's DGI technology was tested using modified validation methodologies published by the American Society of Civil Engineers (ASCE) and its Environmental & Waters Research Institute (EWRI), with the results being both peer-reviewed and endorsed by two industry experts. Through this testing, Fuel Tech determined:

99+% of the oxygen supplied to the DGI system was delivered to the treatment reservoir as dissolved oxygen with no loss to the atmosphere, within described measurement uncertainties;
the DGI channel injector was completely effective in transferring the oxygen-infused water stream to the reservoir water while located only twenty-four inches below the water surface; and
there was no measurable loss of oxygen to the environment, no visible bubbles, and no delay in the availability of the supplied oxygen to react in the aqueous phase.

Fuel Tech's DGI technology is an innovative alternative to current aeration technologies. DGI utilizes two patent-pending technologies to ensure optimal gas delivery to target water and wastewater process applications: a next generation pressurized saturator for gas transfer to a slipstream of water; and an innovative delivery system to distribute an oxygenated slipstream of water that virtually eliminates gas loss from the targeted reservoir.

DGI addresses a variety of issues, including regulatory compliance, water preservation, as a replacement for chemicals to treat wastewater, odor reduction, and improving overall water quality for humans and wildlife. DGI's addressable markets include water and wastewater treatment, agriculture and irrigation, reservoirs and natural waters, industrial process water conditioning, pulp and paper, food and beverage facilities, upstream oil & gas, and landfill leachate.

Vincent J. Arnone, President and Chief Executive Officer, commented, "This validation study is a foundational component of our ongoing DGI business development strategy. We are continuing to evaluate our resource requirements to achieve our goal of product commercialization by year end 2022 and as noted on our recent conference call we have begun our search for an experienced water and wastewater treatment executive to assist in our efforts."

About Fuel Tech

Fuel Tech develops and commercializes state-of-the-art proprietary technologies for air pollution control, process optimization, water treatment, and advanced engineering services. These technologies enable customers to operate in a cost-effective and environmentally sustainable manner. Fuel Tech is a leader in nitrogen oxide (NO_x) reduction and particulate control technologies and its solutions have been in installed on over 1,200 utility, industrial and municipal units worldwide. The Company's FUEL CHEM^® technology improves the efficiency, reliability, fuel flexibility, boiler heat rate, and environmental status of combustion units by controlling slagging, fouling, corrosion and opacity. Water treatment technologies include DGI™ Dissolved Gas Infusion Systems which utilize a patented nozzle to deliver supersaturated oxygen solutions and other gas-water combinations to target process applications or environmental issues. This infusion process has a variety of applications in the water and wastewater industries, including remediation, aeration, biological treatment and wastewater odor management. Many of Fuel Tech's products and services rely heavily on the Company's exceptional Computational Fluid Dynamics modeling capabilities, which are enhanced by internally developed, high-end visualization software. For more information, visit Fuel Tech's web site at www.ftek.com.

NOTE REGARDING FORWARD-LOOKING STATEMENTS

This press release contains "forward-looking statements" as defined in Section 21E of the Securities Exchange Act of 1934, as amended, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and reflect Fuel Tech's current expectations regarding future growth, results of operations, cash flows, performance and business prospects, and opportunities, as well as assumptions made by, and information currently available to, our management. Fuel Tech has tried to identify forward-looking statements by using words such as "anticipate," "believe," "plan," "expect," "estimate," "intend," "will," and similar expressions, but these words are not the exclusive means of identifying forward-looking statements. These statements are based on information currently available to Fuel Tech and are subject to various risks, uncertainties, and other factors, including, but not limited to, those discussed in Fuel Tech's Annual Report on Form 10-K in Item 1A under the caption "Risk Factors," and subsequent filings under the Securities Exchange Act of 1934, as amended, which could cause Fuel Tech's actual growth, results of operations, financial condition, cash flows, performance and business prospects and opportunities to differ materially from those expressed in, or implied by, these statements. Fuel Tech undertakes no obligation to update such factors or to publicly announce the results of any of the forward-looking statements contained herein to reflect future events, developments, or changed circumstances or for any other reason. Investors are cautioned that all forward-looking statements involve risks and uncertainties, including those detailed in Fuel Tech's filings with the Securities and Exchange Commission.

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Fuel Tech Releases White Paper Validating Oxygen Transfer Efficiency of Its Dissolved Gas Infusion Technology