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Tách dầu mỏ thành các thành phần có giá trị
Tổng quan
Fractional distillation is the primary process for refining crude oil into usable products. Crude oil is heated to approximately 400 degrees C and fed into a fractionating column where different hydrocarbon fractions condense at different heights based on their boiling points. This single process produces gasoline, diesel, kerosene, lubricating oils, and heavy fuel oil. Globally, over 600 refineries process approximately 100 million barrels per day, making this the largest-scale chemical separation process in existence.
Quy trình hóa học
Crude oil is preheated and desalted, then fed into an atmospheric distillation column at 350-400 degrees C. Lighter fractions (gases, naphtha, kerosene) rise and condense at the top, while heavier fractions (gas oil, residuum) collect at the bottom. Vacuum distillation further separates the residuum.
Nguyên liệu thô
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Crude oil — Oil wells (conventional and unconventional) (Feedstock)
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Steam — Boiler systems (Stripping agent)
Sản phẩm cuối
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Gasoline (naphtha) — Motor fuel and petrochemical feedstock (C₅-C₁₂ hydrocarbons, bp 30-200 degrees C)
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Kerosene/Jet fuel — Aviation fuel and heating (C₁₂-C₁₅ hydrocarbons)
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Diesel — Transportation fuel (C₁₅-C₂₀ hydrocarbons)
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Heavy fuel oil — Marine fuel and power generation (C₂₀+ hydrocarbons)
Environmental Impact
Petroleum refining is one of the largest industrial sources of CO₂, SO₂, and NOx emissions. Refineries produce wastewater containing phenols, sulfides, and heavy metals. Modern refineries use flue gas desulfurization and vapor recovery systems to minimize atmospheric emissions.
Lưu ý an toàn
- ⚠ Extremely flammable hydrocarbons throughout the process
- ⚠ Hydrogen sulfide (H₂S) in sour crude is acutely toxic
- ⚠ High-temperature and high-pressure operations
- ⚠ Potential for catastrophic fires and explosions
Đổi mới gần đây
Advanced process control using AI and machine learning optimizes cut points in real-time, improving yield of high-value products.
Crude-to-chemicals refineries skip traditional fuels and convert crude directly to petrochemical feedstocks.
Quy mô sản xuất
4400000000
tấn/năm
$2.5 trillion
giá trị thị trường
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