China’s power sector could cut a third of SF6 emissions by boosting recycling
China’s electric utilities emit most of the world’s sulfur hexafluoride, a potent greenhouse gas, but could slash emissions by about one-third by raising recycling from roughly 30% to 90% at modest cost.
China’s high-voltage power network relies on sulfur hexafluoride (SF6), a synthetic insulator that traps heat 24,300 times more effectively than CO₂ and persists for a millennium. While the country leads renewable growth, it also accounts for more than half of worldwide SF6 emissions, releasing 5,100 metric tons in 2021—equivalent to 29 million gasoline cars. Government statements claim a 90% recycling capability, yet independent analysis suggests actual rates are near 30%.
By improving recycling to about 90%, state-owned utilities could capture an additional 1,400 metric tons each year, lowering national emissions by roughly one-third for an estimated $6 million annually, a tiny slice of the $70 billion grid investment. Experts argue the technology is mature and inexpensive compared with alternatives like wind or solar. Pilot projects and new policy incentives are emerging, but broader regulatory action may be needed to achieve the target.
Why it matters
Reducing SF6 emissions offers a cheap, fast way to curb a greenhouse gas that stays in the atmosphere for centuries.
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