The 21st Edition of International Conference on Catalysis, Chemical Engineering and Technology is scheduled for June 18-20, 2026, in Barcelona, Spain, with a virtual participation option to ensure global access. This hybrid format facilitates wide international engagement from academia, industry professionals, researchers, and policymakers. The conference theme, “Catalyzing Innovation: Connecting Chemistry, Engineering, and Technology for Tomorrow’s World,” highlights its dedication to exploring innovative advancements and tackling key challenges in the fields of catalysis and chemical engineering.