Liqui-Cel® membrane contactors are used to efficiently remove gases from liquids or add gas to liquids. These membrane devices have displaced older technology such as vacuum towers, forced draft deaerators and oxygen scavengers for over 20 years. Typical applications are O2 removal from water and CO2 removal from water; however, membrane contactors are quite capable of controlling several types of dissolved gasses. For example, adding or removing nitrogen carbonation, humidification of gasses, VOC removal and control of gases for improved ultrasonics are some of the other applications.
Liqui-Cel® membrane contactors are capable of removing oxygen to <1ppb and carbon dioxide down to <1ppm.
Boiler feedwater deaeration, dissolved gas removal and corrosion control
Liqui-Cel® membrane contactors are often installed to control corrosion in boilers, piping and system components. By removing gases such as oxygen and carbon dioxide the amount of oxidation is reduced, thereby protecting against costly replacement and repairs. In addition, because these devices do not require chemicals to operate, blow down frequency is reduced and operating costs are less.
For these reasons, Liqui-Cel® membrane contactors have become the technology of choice to control dissolved gas removal in many industries. These types of installations are particularly popular in the power, chemical and other processing industries.
Degassing for microelectronics, semiconductor wafers and flat panel displays
Liqui-Cel® contactors have become the degassing standard in the microelectronic and flat panel industry because they are clean, have very low extractables and do not negatively impact the water quality. Since Liqui-Cel® contactors are small, compact and can easily remove dissolved oxygen down to 1ppb and dissolved carbon dioxide down to 1ppm, it is a match that makes perfect sense.
Semiconductor wafers and flat panel displays go through a multi-step process where ultrapure water is required to wash the residual processing materials off the wafer or display media. Any gasses present in the water can deposit on to the wafer surface and cause defects.
EDI and CDI technology
EDI and CDI have also become common technologies in the semiconductor and pharmaceutical industries. These technologies operate more efficiently when dissolved CO2 is removed from the water so excess CO2 cannot load the EDI. This reduces the number of EDI stacks required because they operate more efficiently.
High purity water is an integral part of processing pharmaceuticals. Pharmaceutical plants require a continuous supply of water, often with a conductivity of <1.3µS/cm. This level of purity has to be constant and maintained throughout processing. CO2 removal is the optimal means to achieve this level of purity.
Liqui-Cel® membrane contactors are an efficient, chemical-free means to accomplish carbon dioxide removal. Additionally, Liqui-Cel® systems are closed systems that do not introduce environmental contaminants into the water like an old forced draft deaerator used to do.
Chemical dosing with NaOH was also commonly used to control CO2 in plant water for many years. However, environmental pressures, safety concerns and cost has pushed the industry away from chemicals.
As with the microelectronics industry, EDI and CDI have become common technology in the pharmaceutical industry. These technologies operate more efficiently if the dissolved CO2 is first removed from the water.
Liqui-Cel®, SuperPhobic®, MiniModule® and MicroModule® membrane contactors are used extensively in the microelectronics, pharmaceutical, power, food and beverage, industrial, photographic, digital printing/ink jet ink and analytical/research/laboratory markets.
3M Industrial Business Group
Membranes Business Unit
13840 South Lakes Dr.
United States of America
+1 704 587 8888
+1 704 587 8610
Improve Water Quality
O2 Removal From Water
Energy Recovery Using Cold Boiler Feed-Water
Available White Papers
Membrana Liqui-Cel Dissolved Gas Control for Beverage Production Liqui-Cel Membrane Contactors use a hydrophobic polypropylene membrane to remove dissolved gases from liquids.
Technology Qualification of Liqui-Cel® Membrane Contactors for Deoxygenation of Low Salinity Water for Polymer Flooding Polymer flooding using low salinity water has been shown to improve oil reservoir recovery rates, by altering the reservoir characteristic from an oil-wet state to a water-wet state.
Liqui-Cel® Membrane Contactor Technology Being Evaluated for Dissolved Gas Removal from Water The oil and gas industry has utilised various deaeration technologies for many years to remove dissolved gases, particularly oxygen, from injection water.
Advanced Membrane Degassing Technology for Radiation Source Term Reduction and Corrosion Control Dissolved gas control in a nuclear power plant's water system, including the primary make-up water storage tank and refuelling water storage tank, can be essential to reduce radiation source term.
Chemical Cost Comparison of a Conventional Deaerator vs. a Liqui-Cel® Membrane Contactor Mixed bed ion exchange is often used to polish reverse osmosis (RO) permeate in many industrial water systems.