{"id":15806,"date":"2025-10-21T08:59:43","date_gmt":"2025-10-21T08:59:43","guid":{"rendered":"https:\/\/roydadnaft.ir\/English\/?p=15806"},"modified":"2025-10-21T08:59:43","modified_gmt":"2025-10-21T08:59:43","slug":"tehran-refinery-commits-3-5-billion-to-upgrade-all-products-to-euro-5-standards","status":"publish","type":"post","link":"https:\/\/roydadnaft.ir\/English\/15806\/","title":{"rendered":"Tehran Refinery Commits $3.5 Billion to Upgrade All Products to Euro 5 Standards"},"content":{"rendered":"

RoydadNaft – <\/a><\/span>\u00a0Iran\u2019s Tehran Oil Refinery, one of the country\u2019s oldest and largest facilities, is investing $3.5 billion to modernize operations and produce all fuels\u2014including gasoline, diesel, and jet fuel\u2014in line with stringent Euro 5 environmental standards, its refining engineering chief said.<\/p>\n

Mohsen Siyahpush, head of refining engineering, told Iran Petroleum magazine the overhaul will add 2 million liters of daily Euro 5 gasoline capacity by 2026 and transform the refinery into a full-fledged petro-refinery complex. \u201cThis project will play a decisive role in Iran\u2019s energy future,\u201d he said.<\/p>\n

Boosting Gasoline Output<\/p>\n

The centerpiece is a Continuous Catalytic Reforming (CCR) unit, set for completion in 2026, which will lift gasoline quality to Euro 5 levels and increase output by 1.5 million liters per day. A new light\/heavy naphtha separation unit will add another 500,000 liters daily by enhancing octane ratings and yields in isomerization and catalytic reforming processes.<\/p>\n

Siyahpush also announced the near-completion of a 2,000-barrel-per-day hexane solvent plant, due online by late 2025. Hexane, used in chemicals, paints, pharmaceuticals, rubber, and adhesives, will diversify high-value output.<\/p>\n

Diesel and Jet Fuel Enhancements<\/p>\n

Tehran Refinery\u2019s diesel has met Euro 5 standards for years, while its jet fuel ranks among Iran\u2019s highest quality. To address cold-weather performance, the refinery signed a May 2025 deal for Cold Filter Plugging Point (CFPP) additives.<\/p>\n

\u201cParaffin crystallization in diesel clogs filters in sub-zero temperatures,\u201d Siyahpush explained. Current CFPP levels (0 to -6\u00b0C) fall short of winter specs (-12\u00b0C max), but the additive will ensure smooth diesel engine operation, supporting localization efforts amid sanctions.<\/p>\n

$3.5 Billion Bottom-of-Barrel Upgrade<\/p>\n

The flagship project\u2014residue upgrading and fuel oil value enhancement\u2014requires $3.5 billion and promises strong returns. It will produce governance-mandated fuels plus high-value propylene and low-sulfur marine fuel.<\/p>\n

Basic studies are complete, with feasibility and economic analyses done for Phase 1 (fuel oil hydrotreating and offsites). The refinery is now securing technology and contracts, partnering with the Petroleum Industry Research Institute for domestic innovations like solvent deasphalting.<\/p>\n

Petro-Refinery Expansion<\/p>\n

Holding a 51.32% stake in Shazand Petrochemical, Tehran Refinery already operates as a hybrid petro-refinery, supplying feedstock to boost value-added products and curb raw material exports.<\/p>\n

With 250,000 barrels per day capacity\u201414% of Iran\u2019s total refining\u2014the facility produces 7 million liters of gasoline and 14 million liters of diesel daily, powering central, northern, and northeastern regions.<\/p>\n

The upgrades position Tehran as an advanced, profitable petro-refinery with a complete value chain, leveraging domestic tech and innovation.<\/p>\n

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