THE CATALYST April 2023 Volume 36, Issue 4 REVIEW Double Feature Industry Perspective Sustainable Fuels and Green Hydrogen Page 3 Special Features A New Frontier Page 8 Repeatability and Reproducibility Page 12 Technical & Commercial Progress in the Global Catalytic Process Industries Experimental Abstracts Page 16 Movers & Shakers Page 20 A Publication of The Catalyst Group Resources, Inc.