Material Insights · Understanding the Material World

Ethylene and Methanol

In China, methanol-to-olefins (MTO) plants turn about 2.6 to 3 t of methanol into a tonne of ethylene and propylene, so methanol competes with naphtha and ethane as an olefin feed. Olefin prices therefore cap what MTO plants can pay for methanol, and coastal MTO plants that buy imported methanol are the swing users.

Ethylene (chemical) and Methanol (chemical): 4 relationships.

How they are linked

1. Methanol-to-olefins

Substitution · Medium · Methanol competes with cracker feeds

MTO catalysts convert methanol, made from coal or gas, into ethylene and propylene, giving China an olefin route that does not need oil or ethane.

  • 2.6 to 3 t methanol per tonne of light olefins in DMTO units
  • 17% coal and methanol routes' share of China's olefin capacity, end-2016
  • about 18% CTO and MTO share of China's ethylene capacity, about 2022

The share of China's olefin capacity rose from 1% to 17% by the end of 2016, while steam crackers supplied 98% of Chinese supply in 2010. By about 2022 coal and methanol routes held about 8.3 Mt a year, or about 18%, of China's ethylene capacity, against about 69% for naphtha cracking, so further growth came mainly from crackers. Outside China the route is rare.

Sources: IHS Markit World Methanol Conference; Wood Mackenzie; China Chemical Reporter

2. Olefin prices cap methanol

Cost and price · Asymmetric · Ethylene and propylene prices to methanol demand

With close to 3 t of methanol per tonne of olefins, an MTO plant runs only while olefin prices cover that methanol cost, so it cuts runs when methanol is dear and so caps methanol prices.

Plants integrated back to coal can keep running, but merchant MTO plants that buy methanol shut first. On 19 October 2026 Nanjing Chengzhi halted its MTO unit on heavy losses and disrupted Iranian supply, and Mysteel reported that all coastal MTO plants relying on imported methanol had shut.

Sources: IHS Markit World Methanol Conference; Mysteel

3. Imported methanol for coastal MTO

Shared risk · Medium · Iranian supply to Chinese olefins

Coastal MTO plants are the main buyers of China's imported methanol, much of it from Iran, so a supply shock in the Gulf hits Chinese olefin output.

  • at least 50% share of mainland China's imported methanol from Iran, 2026 estimate

OPIS noted in March 2026 that private coastal MTO producers are the main users of imported methanol. When Iranian supply was disrupted later that year, coastal MTO output stopped.

Sources: OPIS; Mysteel

4. Price link: competing route

Cost and price · Medium · Both ways

Because MTO links methanol to olefin margins in China, broad methanol and ethylene price proxies drift together over a year.

  • 0.29 monthly change correlation
  • 0.64 12-month change correlation
  • 0.07 fitted elasticity

The site uses a basic organics proxy for methanol and a petrochemicals proxy for ethylene. The elasticity is very low, a given percentage move in one being matched by only a small move in the other, consistent with most ethylene being made from naphtha and ethane rather than methanol.

Sources: Material Insights (World Bank, FRED, IMF data)

For investors

Key learnings

  1. MTO turns Chinese olefin margins into a ceiling on methanol prices, since merchant MTO plants cut runs when methanol is expensive.
  2. Coastal MTO plants depend on imported methanol, at least half of it from Iran, so Gulf disruptions hit them first.
  3. Outside China ethylene and methanol are only loosely linked, so the relationship is a China trade, not a global one.

What to track

  • MTO margin in China (olefin prices minus about 3 t of methanol): Shows whether merchant MTO runs or idles (Weekly · industry price reports)
  • China coastal MTO operating rate: Measures methanol import demand (Weekly · Mysteel, industry reports)
  • China methanol imports and Iranian loadings: Show supply risk for coastal MTO (Monthly · China customs, OPIS)

For policymakers

Key learnings

  1. China built coal and methanol routes to olefins to cut reliance on oil-based feeds; they reached about 18% of its ethylene capacity by about 2022.
  2. For coal-rich importers of oil and gas, including India, China's experience shows coal can make olefins, but merchant MTO plants are exposed to methanol import shocks.
  3. Methanol supply from the Gulf is a shared chokepoint for MTO plants and for other methanol users that import.

What to track

  • China MTO and coal-to-olefins capacity: Shows how much olefin supply depends on methanol (Annual · industry consultants)
  • Gulf methanol export disruptions: Signal price spikes and MTO cuts (As reported · OPIS, Argus)

Sources

  1. Price correlation, Material Insights, Material Insights (World Bank, FRED, IMF data)
  2. DMTO technology and commercial methanol-to-olefins plants in China (conference presentation), IHS Markit World Methanol Conference (2016)
  3. Switching gears: olefins production, Wood Mackenzie (2017)
  4. Nanjing Chengzhi shutdown takes China's coastal MTO operating rate to zero, Mysteel (2026)
  5. The impact of US-Iran conflict on methanol markets, OPIS (2026)
  6. China's ethylene industry review (OilChem), China Chemical Reporter (2024)