Natural Gas Liquids (NGL)
Natural gas typically contains a mixture of methane and other heavier hydrocarbon gases, carbon dioxide, nitrogen, water and a range of other unwanted components. The unwanted components must be partly removed and the heavier hydrocarbons separated prior to liquefying and transporting natural gas. Linde achieves the desired mixture through a proven combination of adsorptive and cryogenic processes.NGL and LPG recovery
Drawing on our world-class experience across the entire natural gas processing chain, we offer engineering as well as turnkey plant construction for natural gas liquid (NGL) and liquefied petroleum gas (LPG) recovery plants. Due to their added value, heavier hydrocarbons (NGL/C2+ and LPG/C3+) are often extracted from natural gas and cryogenic processes are often the most economical way to separate these fractions.
Standard NGL Recovery Plant - STANDARD-PLUS™ A complete standard NGL recovery plant.
With the ever-evolving gas market, the demand to build gas processing plants faster, without affecting quality and high performance, continues to grow. Many engineering companies have developed standard designs for core cryogenic equipment. The cost and time savings when constructing the STANDARD-PLUS™ plant can be as much as 4-6 months compared to just using standard core cryogenic equipment that still requires other components to be custom engineered. The STANDARD-PLUS™ product line was developed to meet demand for flexibility without compromising quality, safety, and reliability.
- Higher recovery with less energy
- Higher flexibility
- Improved delivery time
- Reduced capital and construction costs
- Inlet receiving and stabilization
- Amine treating and acid gas flare
- Dehydration and cryogenic plant - CRYO-PLUS™
- Residue gas compression
- NGL product pumps
- Balance of plant utilities
- NGL fractionation train
NGL consists of ethane and heavier hydrocarbons (C2+) and is an ideal feedstock for steam crackers producing olefins. As a first step, the natural gas has to be dehydrated, cryogenically processed andC2+ extracted. Then the lean gas is warmed and recompressed to the required pipeline pressure. The resulting liquid C2+ stream can then be fractionated into ethane, propane, butane and gasoline. The liquid products are stored either in cryogenic flat-bottom tanks, in pressurized bullet tanks or spherical tanks to be loaded for transportation.
LPG consists mainly of propane (C3) and butane (C4) and is widely used as an alternative automotive fuel or as chemical feedstock. For the recovery of LPG, we offer an advanced expander process using cryogenic absorption and a deethanizer column, which allows for recovery rates as high as 99.9%, while minimizing energy consumption. The expander process enables higher CO2 content in the feed gas than conventional expander processes. LPG can be fractionated, stored in tanks and loaded for export in the same manner as NGL.