PROVEN TECHNOLOGY for
MERCURY REMOVAL from WATER
MERSORB® LW mercury removal adsorbent is used to achieve low mercury concentrations in wastewater from a variety of industrial processes and from ground water. This mercury removal adsorbent is a high surface area (1,000 m2/g) activated carbon pellet (extrudate) that is impregnated with elemental sulphur by a proprietary method. Our impregnation method creates a high level of dispersion of the sulphur atoms inside the micropores of the activated carbon substrate. High dispersion makes more of the impregnant available to remove mercury.
MERSORB® LW mercury removal adsorbent is quality control tested to 200 °C (392 °F) in air. It has been tested and performs very well in water as hot as 50 °C (122 °F). When water temperature increases, its viscosity decreases, so mercury diffuses more rapidly. As the temperature is increased, a further benefit is a faster reaction rate of mercury with the sulfur impregnant in the mercury adsorbent. Both of these effects of higher water temperature increase the mercury removal efficiency.
Typical particle sizes of MERSORB® LW mercury adsorbent used in water treatment service are 1.5mm & 1.0mm diameter pellets. These pellet sizes provide mercury removal efficiencies of up to 99+% at a pressure drop within the limit specified by the client. The pellets have high crush resistance, wet and dry, and are low in dust.
Because MERSORB® LW mercury adsorbent pellets are uniform in size & very low in dust, they do not require backwashing. Pressure drop typically remains low during the service life of the adsorbent. Granular carbons, however, require frequent backwashing & are often replaced before their contaminant capacity is used up, due to high pressure-drop. Thus, MERSORB® LW mercury adsorbent is a low-maintenance product which outperforms granular carbons.
Particle filters before the mercury adsorbent are an essential part of The AntiMercure® Process. The mercury adsorbent removes Hg atoms, Hg ions, & organo-Hg molecules. Particles that contain mercury must be removed upstream of the adsorber vessels. Lab tests can be used to determine the optimum PreFilter particle size for a particular installation. A wire-mesh screen can NOT be used instead of the PreFilter. Depending on the mercury removal performance desired by the client, it may be necessary to also use a PostFilter to ensure that the treated water stays within the required treated water Hg concentration limit.
MERSORB® mercury adsorbents
The MERSORB® mercury adsorbent Product Line includes a wide range of product types & particle sizes to remove mercury in almost any industry where mercury control is required for protection of plant equipment and the environment.
MERSORB® mercury adsorbent is supplied as sulfur-impregnated activated carbon pellets & granules in several particle sizes for removing mercury from air, natural gas, hydrogen, nitrogen, & other gases, both dry and water-saturated.
MERSORB® CR mercury adsorbent is supplied in 1.5mm, 3mm, & 4mm pellet sizes and is impregnated with a metal-oxide for gas applications where intermittent exposure to hydrocarbon liquids is expected. See TR-Selecting the Right Product. Competing metal oxide spheres have a low internal surface area of ≤ 50 m2/g, and thus have a low mercury capacity on a weight % basis. Impregnated activated aluminas have an internal surface area of only about 250 m2/g vs. the internal surface area of 1,000 m2/g of MERSORB® CR mercury adsorbent. MERSORB® CR 1.0mm and 1.5mm pellets are used to treat hydrocarbon liquids such as propane, butane, LPG, naphtha, and light condensate to remove both sulfur compounds and mercury.
MERSORB® HT mercury adsorbent is supplied in 1.5mm, 3mm, & 4mm, pellet sizes and is quality control tested to 200 °C. This product has proven its ability to provide high mercury removal efficiencies at feed gas temperatures as high as 130+ °C.
MERSORB® LW mercury adsorbent is supplied in 1.5mm & 1.0mm pellets for removing mercury from liquid water. Using our AntiMercure® Process and MERSORB® LW mercury adsorbent, treated water qualities of < 0.050 ppBw Hg have been achieved.
MERSORB® LH mercury adsorbent is supplied in 1.5mm & 1.0mm pellets for removing mercury from liquid hydrocarbons such as propane, butane, LPG, and light condensate.
Wet activated carbon removes oxygen from air. Thus, an asphyxiation hazard exists inside enclosed spaces containing activated carbon. Use appropriate safety precautions when entering vessels or other enclosed spaces containing activated carbon.
MERSORB® mercury adsorbent is a trademark of Nucon International, Inc. (NUCON®) for impregnated activated carbons used to remove mercury from gases and liquids. Information presented herein is believed to be accurate and reliable but does not provide any guarantee or warrantee by NUCON® or by Selective Adsorption Associates, Inc.
AntiMercure® is a Registered Trademark of Selective Adsorption Associates, Inc. for its Process for removing mercury from water. AntiMercure® is a Trademark of Selective Adsorption Associates, Inc. for its Systems for removing mercury from water. All Rights Reserved.