The good news is that there are some other PGMs that could be potential substitutes—but those options are either more rare or are also supplied by South African mines. For instance, rhodium is also used in some catalysts, but it, too, is sourced from South African mines—and costs more than palladium. Other known stocks of PGM are either diminishing rapidly (Russia) or are found in politically unstable countries (Zimbabwe).
Meanwhile, vehicle sales are increasing worldwide, and emissions standards are being implemented or tightened, particularly in developing countries like China. In 2012, palladium demand for catalysts reached a record high due to increases in Japanese and North American car manufacturing as well as a rapidly growing Chinese vehicle market. The same thing is happening with platinum catalyst demand because of increased diesel vehicle manufacturing in Asia and North America. Finally, demand is also escalating because of stricter emissions regulations for non-road diesel vehicles (such as construction and agricultural equipment), which have historically not been as well regulated as on-road vehicles.
That’s why there will be global ripple effects if the South African mining labor disputes are not resolved. Without productive mines, we’ll continue to see demand for platinum and palladium outstrip supply. That, in turn, could potentially delay emissions regulations—just as a rapidly modernizing developing world is increasingly adopting personal vehicles—and cause further environmental damage as well as health problems for those breathing in urban air pollution.
Beyond a sustained settlement to labor negotiations, a temporary solution could be to promote the recycling of the metals. For instance, due to relatively low prices of PGM last year, many collectors in Europe and North America hoarded stock of used catalysts that would otherwise be recycled and could help ease supply deficits. However, recycling would only be a temporary solution because hoarded stocks will be sold and exhausted as metal prices rise. Another source of recycling is in countries implementing stricter emissions standards. For example, recycling of palladium is expected to increase in China as more vehicles are adopting catalysts, and as the government enacts new regulations requiring older, higher-polluting vehicles that were originally fitted with less-efficient catalysts to be scrapped. This will result in improvements in the recycling capacity and infrastructure in China. But even with a better recycling infrastructure, the growth of vehicle ownership in China means that new metals would have to be introduced into the system before recycling is utilized as a significant source of palladium.
This problem demonstrates the importance of resilience in a manufacturing system. The supply-chain shocks to PGM supply from South Africa threaten global catalyst manufacturing. Vehicles must use catalysts to achieve emissions regulations. Catalysts must use PGM to be effective. PGM is primarily available in South Africa. If any part of this chain is weakened, the whole process is threatened—and it’s impossible to count how many other critical systems suffer from the same lack of diversity. Ultimately, the only long-term solution is to strengthen the vehicle emissions control technology supply-chain by developing new methods to control toxic pollutants or more robust sources of catalyst material. Without enhancements to this system, disruptions in South African PGM output could have the potential to weaken catalyst production and air quality around the world.
This article arises from Future Tense, a collaboration among Arizona State University, the New America Foundation, and Slate. Future Tense explores the ways emerging technologies affect society, policy, and culture. To read more, visit the Future Tense blog and the Future Tense home page. You can also follow us on Twitter.
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