To reduce batch contamination and product loss, you must use an effective H2S filter for purification of CO2. Especially important in the food and beverage markets, pure CO2 protects your products from the risk of contamination by sulfur compounds, aromatic hydrocarbons, aldehydes and potentially harmful submicron particle contamination and bacteria. These contaminants may cause off-flavors and spoilage problems that can quickly translate into product and dollar loss. You may not now be adequately protected. Sophisticated quality testing equipment has shown that the commonly used activated carbon filters do not always effectively achieve the high quality gas as recommended in the ISBT CO2 Guidelines. * However, you can achieve this high level of purity when using a Sulfur Guard™ filter that incorporates a unique combination of adsorbents to remove the contaminants from CO2 that most threaten food and beverage quality. The use of effective, economical filtration media specifically designed for CO2 will help ensure that your product is protected from these contaminants.
No other filter offers this combination of features: Large Capacity Filter Element removes COS and H2S also removes aromatic and volatile oxygenated hydrocarbons allows high CO2 flows at low pressure drop permits a much smaller sized filter when compared to traditional carbon filters filter media is completely contained in filter element - no loose carbon   Filter Housing Flexibility and Durability housing accommodates Coalescing, Activated Carbon, and Sulfur Guard stages all stainless steel, corrosion free design high strength ASME vessel   Filter Designed for Easy Maintenance easy top loading access to filter element for quick change no messy carbon to change lowest total maintenance costs

Sulfur Guard™ by MicroPure purifies CO2 by removing sulfur compounds, aromatic hydrocarbons, and aldehydes plus other potential contaminants through chemical adsorption. Sulfur Guard™ has been designed specifically to adsorb the sulfur compounds, hydrogen sulfide and the particularly troublesome carbonyl sulfide that can be unpredictably present in CO2. This special design also removes benzene, hexane, volatile oxygenated hydrocarbons, and some aldehydes more efficiently than traditional activated carbon filters. Under typical levels of contamination, the filter cartridges should be changed every six months.

The Sulfur Guard™ filtration mechanism is irreversible. Its formulation of filter adsorbents has special properties that when combined with activated carbon chemically converts H2S and COS into a stable form. This ensures that the adsorbed contaminants will not de-sorb back into the pure CO2 stream. Extensive testing both in the laboratory and in the field has shown that this technology is extremely effective. **

The adsorption filter is only part of the Sulfur Guard™ CO2 purification system. In addition to the sulfur-adsorbing stage there are other filter stages that include upstream coalescing filters to remove liquid water and oils and if desired, an additional activated carbon filter can be added upstream of the special Sulfur Guard™ stage to remove high levels of aromatic hydrocarbons. A final stage particulate filter will remove particles and bacteria down to the 0.01-micron level. Sulfur Guard is so much more than just an H2S filter.

A camera-ready brochure containing full technical specifications is also available in PDF format. Note that you will need the free Adobe Acrobat Reader in order to display and print this document.

* ISBT Carbon Dioxide Guidelines, 1999, International Society of BeverageTechnologists

** Evaluation of Filtration Material for Removal of COS & H2S from CO2, 2000, AJE Testing & Research