Since the 1970s, with the emphasis on environmental protection in developed countries, the control of automobile exhaust pollution has become the focus of improving air quality. Many countries have legislated one after another to limit the content of CHX, CO, NOX and other harmful components in automobile exhaust. Since the 1990s, the United States, Europe, and Japan have continuously increased the requirements for the purification of exhaust emissions. To ensure the purification effect, the manufacturers have successively increased the content of platinum group metals in the catalyst. Since my country's reform and opening up, production has developed rapidly, living standards have improved significantly, and automobiles have begun to enter households in large numbers; the demand for recycling platinum, palladium, and rhodium used in the automobile industry has become increasingly urgent.
评论