World Catalyst Market Series——Six of the 8 Catalysts That Are Changing the World: Three-Way Catalysts
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Catalysts play a very important role in the advancement of human civilization and the development of the world economy; every major breakthrough in this field has significantly transformed the ways in which humans produce and live. The emergence of each catalyst has given rise to a new industry; today we introduce the three-way catalyst, one of the eight catalysts that have changed the world since the Industrial Revolution. For more information, please visit: World Catalyst Market Series https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5512570
Three-way catalyst: The main function of a three-way catalyst is to convert toxic compounds in vehicle exhaust such as CO, NOx, and HC into CO2 and water. Since the current catalysts contain three precious metal catalysts—platinum, palladium, and rhodium—they are known as three-way catalysts. In 1974, the first air pollution control law was implemented in the United States; at that time, only CO and HC were regulated, and the catalysts used for treating vehicle exhaust were Pt-Pd oxidation-type catalysts ； Later, as the damage caused by photochemical smog to the air became increasingly severe, NOx also became an important indicator of air emissions. In 1989, Ford Motor Company first used Pd/Rh catalysts in experiments as part of three-way catalysts, which simultaneously catalytically removed the three harmful pollutants of CO, HC, and NOx. The three-way catalyst has since become a classic catalyst in the automotive exhaust treatment industry.