Titanium dioxide: Emissions

The energy, acid and waste behind bright white

What this tab covers The greenhouse-gas footprint per tonne, split by lifecycle phase (feedstock, production, movement, use, end of life), the global total, other environmental impacts, levers and low-carbon routes, India's position, and where the investment opportunity lies. Emission intensity 3.50 t CO2e per t range about 2.5-6 · cradle-to-gate including feedstock upgrading (slag smelting or synthetic rutile), acid or chlorine, calcination or oxidation, and finishing; higher for sulphate plants on coal power Global emissions per year 27.0 Mt CO2e per year 2025 · 3.5 t/t x 7.8 Mt indicative output

Per t of TiO2 pigment, cradle-to-gate. Intensity: Published producer LCAs (indicative). Global total: Derived (indicative).

Share of footprint by lifecycle phase

Feedstock 40% Production / process 55% Movement 5%

Footprint by lifecycle phase

Phase	Intensity	Share	Main sources of emissions	Notes	Source
Feedstock	about 1.4 t CO2e per t TiO2	40%	Mineral sands mining, electric slag smelting, synthetic rutile kilns, sulphuric acid or chlorine supply	Slag smelting on coal-heavy grids (South Africa) is carbon intensive	Indicative
Production / process	about 1.9 t CO2e per t TiO2	55%	Calcination at 900-1,000 C (sulphate), coke in chlorination and oxygen burning (chloride), milling and drying	Coke CO2 is a process emission in the chloride route	Indicative
Movement	about 0.2 t CO2e per t TiO2	5%	Shipping ore and pigment	Container shipping of pigment adds little per tonne	Indicative
Use	none direct	–	Pigment in paint and plastics	Photocatalytic grades can degrade binders; white roofs and cool coatings save cooling energy	Indicative
End of life	not applicable	–	Landfilled or incinerated with paint and plastics	No pigment recycling at scale	Indicative

Other environmental impacts

Sulphate route makes about 3-4 t of ferrous sulphate and 6-8 t of spent acid per t TiO2, historically dumped at sea in Europe until EU rules; chloride route makes metal chloride wastes; mineral sands mining disturbs coastal ecosystems.

Levers to cut emissions

Acid recycling and copperas sale as water treatment chemical or iron source
Renewable power for slag smelting and finishing
Switching calcination and oxidation heat to electricity or hydrogen
Using less TiO2 per litre of paint through better dispersion and extenders
Closing inefficient sulphate plants

India

India's small pigment industry sits on large ilmenite resources; KMML runs a chloride plant and Travancore a sulphate plant. Emission data were not found; imports from Chinese sulphate plants on coal power likely carry higher footprints (indicative).

Emission figures are indicative global averages from the life-cycle studies named; actual footprints vary widely by site, energy mix and method.

Low-carbon routes

Route	Intensity	Cost premium	Status	Source
Chloride plants with acid-free feed and renewable power	about 2-2.5 t CO2e per t (indicative)	not published	best Western sites (indicative)	Indicative
TiO2 substitution in coatings (hollow polymer and polymer-silica particles)	avoids part of pigment emissions	varies	research and commercial opaque polymers (European Coatings, 2026)	European Coatings (2026)

For a climate investor The opportunities are in cleaner pigment capacity near India's beach-sand ilmenite, recycling of sulphate route acid and iron by-products, and reducing TiO2 use per unit of paint. A new Indian chloride plant needs secure high-grade feed (from IREL or imports), chlorine, and stable trade protection, which has been uncertain since 2025. KMML, IREL and paint makers such as Asian Paints are the relevant players.