Petrochemical industry emissions could rise 50% by 2050: Study
A study published in Nature Sustainability projects global petrochemical industry emissions could rise about 50% by 2050 under a business-as-usual trajectory, from roughly 2.0 ± 0.8 GtCO2e in 2023 to 3.0 ± 1.2 GtCO2e
The study is the first facility-level global assessment of the sector, mapping 37,379 production facilities across 81 chemicals and 2,043 manufacturing processes
It finds that 10% of facilities are responsible for 53% of the sector's emissions, and that nine countries together account for 76% of emissions (projected to reach 79% by 2050), with one country alone contributing 37% of the 2020 total
Researchers conclude no single mitigation measure — whether electrification, carbon capture, or feedstock substitution — can bring the sector to net zero on its own; demand-side reduction is flagged as essential alongside supply-side interventions
GHG Accounting and CO2-equivalent (CO2e) Metrics
Emissions from non-CO2 greenhouse gases (methane, nitrous oxide, etc.) are converted to a common unit — CO2-equivalent (CO2e) — using Global Warming Potential (GWP) factors, which express how much a given gas warms the atmosphere relative to CO2 over a set time horizon (typically 100 years). This standardisation, developed under the IPCC framework, allows cross-sector and cross-country emissions comparisons, such as the GtCO2e figures used in this study.
Key Details
- GWP-100 values are published in IPCC Assessment Reports (AR5, AR6) and used in national GHG inventories submitted under the UNFCCC
- The Kyoto Protocol's original "basket" of six greenhouse gases (CO2, CH4, N2O, HFCs, PFCs, SF6) forms the basis of most CO2e reporting; NF3 was added later
- India's National GHG Inventory (submitted under its Biennial Update Reports to UNFCCC) uses the same CO2e convention
The study's headline figures (2 GtCO2e in 2023, projected 3 GtCO2e in 2050) are only meaningful because they aggregate diverse petrochemical process emissions (process CO2, methane leakage, indirect energy-related emissions) into one comparable unit.
India's Petrochemical Investment Framework — PCPIR Policy, 2007
The Petroleum, Chemicals and Petrochemicals Investment Region (PCPIR) Policy, 2007 is the Government of India's framework for developing large, delineated industrial clusters (around 250 sq km each) to attract integrated investment in refining, petrochemicals, and downstream chemical manufacturing, anchored by large "anchor tenant" investments in refining and petrochemical cracker units.
Key Details
- Three PCPIRs have been approved: Dahej (Gujarat), Paradeep (Odisha), and Visakhapatnam (Andhra Pradesh)
- Administered by the Department of Chemicals and Petrochemicals under the Ministry of Chemicals and Fertilizers
- The policy predates India's current net-zero-by-2070 commitment, creating a tension between industrial expansion goals and emissions trajectories highlighted by studies such as this one
As a country hosting concentrated petrochemical clusters under the PCPIR model, India's emissions trajectory is directly shaped by decisions on whether new capacity added at PCPIR sites uses cleaner processes or continues business-as-usual expansion, the scenario this study warns against.
Extended Producer Responsibility (EPR) and Plastic Waste Management Rules, 2016 (as amended 2022)
Petrochemicals are the primary feedstock for plastics, so downstream demand-management policy is a key lever on upstream sector emissions. India's Plastic Waste Management Rules, 2016 (amended in 2022) impose Extended Producer Responsibility, making producers, importers, and brand owners responsible for the environmentally sound management of plastic packaging through its lifecycle.
Key Details
- The 2022 amendment (effective 1 July 2022) introduced category-wise recycling/reuse targets (e.g., 50% for rigid plastic packaging, 30% for certain flexible categories, by 2025) and banned identified single-use plastic items
- Enforced on the polluter-pays principle, with environmental compensation levied for EPR target shortfalls
- Administered by the Central Pollution Control Board (CPCB) under the Ministry of Environment, Forest and Climate Change
The study identifies demand reduction (including reduced virgin plastic production) as necessary alongside supply-side decarbonisation; EPR-driven recycling and reuse mandates are a direct India-specific mechanism for reducing demand on the petrochemical feedstock chain that the study says cannot be decarbonised through production-side fixes alone.
- Sector emissions: ~2.0 ± 0.8 GtCO2e (2023) projected to ~3.0 ± 1.2 GtCO2e (2050) — about 50% growth
- Represents 13% of global industrial GHG emissions and 3.5% of total global GHG emissions
- Global petrochemical production has grown 500% since 1980, to nearly 1 billion tonnes annually
- Sector consumes 30% of industrial energy and 14% of global oil demand
- Study coverage: 37,379 facilities, 81 chemicals, 2,043 manufacturing processes (led by researchers including Fanran Meng, University of Sheffield)
- 10% of facilities produce 53% of sector emissions; top 9 countries account for 76% of 2020 emissions (79% projected by 2050)
- Largest single-chemical emitters: ethylene (~290 ± 50 Mt CO2e, 2023) and ammonia (~250 ± 50 Mt CO2e, 2023)
- Indirect (energy-related) emissions account for 45% of sector emissions