Overview
Hydrotreating units are critical refining systems that chemically treat petroleum fractions with hydrogen under elevated temperatures and pressures. They employ specialized catalysts to break sulfur-nitrogen bonds and saturate olefins, converting impurities into removable compounds like H2S and NH3. Modern units are designed for continuous operation with 90–95% impurity removal efficiency. Primarily deployed in oil refineries, these units enable compliance with stringent fuel standards (e.g., Euro 5/6, Tier 3). Their output feeds downstream units like catalytic crackers or serves as final products. Recent advancements focus on processing heavier feedstocks and reducing hydrogen consumption through improved catalyst formulations.
Structure and Working Principle
A standard hydrotreating unit comprises a feed pump, charge heater, fixed-bed reactor, high-pressure separator, and hydrogen recycle compressor. The reactor typically operates at 300–400°C and 30–130 bar pressure, depending on feedstock. Internally, catalysts (e.g., Co-Mo/Al2O3 or Ni-Mo/Al2O3) are layered in beds to optimize reaction stages. Hydrogen mixes with preheated feedstock before entering the reactor, where exothermic reactions occur. The effluent undergoes gas-liquid separation, with hydrogen recycled to minimize operational costs. Critical auxiliary systems include amine scrubbers for H2S removal and quench oil injection for temperature control. Modern designs integrate heat recovery networks to improve energy efficiency by 15–20%.
Key Features
Advanced hydrotreaters feature multi-reactor configurations for sequential desulfurization and denitrification. Dual-function catalysts allow simultaneous sulfur/nitrogen removal, reducing equipment footprint. Automated control systems maintain optimal reaction conditions using real-time analyzers for sulfur content monitoring. Materials of construction prioritize resistance to hydrogen embrittlement and sulfidic corrosion. Reactor internals use specialized alloys like 347SS or Incoloy 800. Some units incorporate guard beds to trap arsenic/ silicon contaminants that poison catalysts. Modular designs are gaining traction for faster deployment in compact refineries.
Application Areas
Primary applications include diesel hydrotreating (producing <10ppm sulfur diesel), naphtha pretreatment for reformers, and kerosene purification for jet fuel. In petrochemicals, they prepare feedstocks for steam crackers by removing olefin poisons. Emerging uses cover bio-oil upgrading and waste plastic pyrolysis oil refinement. Regional demand varies: North American units focus on heavy oil upgrading, while Asian refineries prioritize diesel production. Marine fuel regulations (IMO 2020) have driven retrofits of existing units for 0.5% sulfur compliance. Integrated complexes often pair hydrotreaters with hydrocrackers for maximum distillate yield.
Maintenance and Precautions
Routine maintenance involves catalyst replacement every 3–5 years and inspection of reactor walls for hydrogen-induced cracking. High-temperature sulfidic corrosion requires periodic thickness checks on piping. Catalyst bed channeling must be prevented through proper feedstock filtration. Safety protocols mandate H2S detectors with automatic shutdowns at 10ppm exposure limits. Startup/shutdown procedures require careful purging to avoid explosive mixtures. Catalyst sulfiding demands precise temperature ramping with DMDS injection. Emergency depressurization systems are critical for runaway reaction scenarios.
B2B Procurement Guide
Procurement considerations start with capacity (barrels per day) and feedstock API gravity. licensor selection (Axens, UOP, or Chevron Lummus Global) impacts technology guarantees. Key evaluation criteria include hydrogen consumption rates (200–800 scf/bbl) and catalyst life expectancy. Lead times range from 18–36 months for custom-engineered units. Modular units offer 30% faster deployment but may lack customization. Budgeting should account for 15–20% of CAPEX for auxiliaries like hydrogen plants. Total cost of ownership analyses should compare catalyst replacement frequency and energy efficiency ratings.
Related Manufacturers
- 主营：小型反应釜、实验室反应釜、不锈钢反应釜、加氢反应釜、微型反应装置、高压反应釜、固定床、非标定制
- 主营：实验室精馏塔、实验室催化挤出机、不锈钢精馏塔、催化剂评价反应装置、分子蒸馏装置、高温高压催化反应装置、固定床催化剂评价装置、流化床反应器评价装置、常减压精馏装置、不锈钢连续精馏装置、共沸精馏装置、连续玻璃精馏装置、玻璃精馏塔、玻璃气液平衡釜、不锈钢气液平衡釜、高压气液平衡釜、精馏塔、防爆精馏连续塔、实验仪器研发、生产、分离提纯精馏塔
- 主营：压力釜、催化剂、反应釜、微反装置、加氢反应器、平衡反应装置、老化试验装置、加氢反应装置、仪器高压加氢、氢化仪、实验室、超声波高压、仪器水合物、无梯度反应器、仪器夹套加热、仪器高压反应、仪器内循环无、仪器原位反应、全混流反应器、征仪器高压釜、仪器催化反应、仪器高温高压、固定床反应器、仪器磁力搅拌、仪器高压化学
- 主营：固定床、催化剂、玻璃精馏、重油加氢、实验装置、微反实验、丙烷脱氢、医药玻璃、实验平台、消防燃烧、医药间歇、精馏实验、烟气脱硝、生物质热解、不锈钢精馏
- 主营：双螺杆、催化剂、流化床、油加氢、合成装置、试验装置、精馏装置、加氢装置、实验装置、联合装置、装置设备、固定床、精馏塔、床反应、反应器、精馏仪器、杆挤条机、挤条设备、汽车尾气、挤出仪器、玻璃精馏、仪器设备、脱硫脱硝、高压精馏、回流实验
- 主营：精馏塔、反应器、液液萃取、高压加氢、催化剂装置、床反应装置、催化加氢装置、反应实验装置、脱硝反应装置、高压反应装置、醋酸裂解装置、树脂加氢装置、脱硫脱硝、气体分离、量固定床、生物质热解、不锈钢精馏、环丝网填料、机物吸收塔、多功能反应、石油切割塔、固定床反应、乙醇回收塔、低温高压精馏、定制实验设备
- 主营：制氮机、定制高纯度、高纯度氮气机、氮气发生装置、工业制氮机、外置制氮机、小型氮气机、食品保鲜制氮机、节能制氮机、高效制氮机、高纯度制氮机、冷冻式干燥机、激光焊接专用氮气机、PSA制氮机、PSA小型制氮机、纯度可调制氮机、变压吸附制氮机、箱式PSA制氮机、高纯度通用制氮机、工业制氧机、小型防爆制氮机、工业氮气机、激光焊接制氮机、激光切割制氮机、东创空分制氮机
- 主营：烧结粉末不锈钢滤芯、膜材料孔径分析仪、完整性测试仪、加氢催化剂过滤设备、钯膜
- 主营：催化剂、催化剂定制和加工、催化剂工程设计
- 主营：优等品氯化铵、农业氯化铵、农用氯化铵、工业氯化铵
- 主营：吸收塔、氨气吸收塔、洗涤塔、喷淋塔、pp喷淋塔、水洗塔、酸雾塔、净化塔、填料塔
- 主营：空气压缩机、冷冻式干燥机、吸附式干燥机、PSA制氮机、精密过滤器、分子筛
- 主营：钴钼加氢催化剂、香精香料、有机中间体、化工助剂
- 主营：渣油加氢处理模型、垃圾分