Exhibit 99.1 CONTACT: Vince Arnone Devin Sullivan President and CEO Managing Director (630) 845-4500 The Equity Group Inc. dsullivan@equityny.com FOR IMMEDIATE RELEASE FUEL TECH REPORTS 2024 FIRST QUARTER FINANCIAL RESULTS WARRENVILLE, Ill. – May 7, 2024 - Fuel Tech, Inc. (NASDAQ: FTEK), a technology company providing advanced engineering for the optimization of combustion systems, emissions control, and water treatment in utility and industrial applications, today reported financial results for the first q ...