Gainesville, FL –July 7, 2016 – Carbonxt, in partnership with United Conveyor Corporation (UCC), is pleased to announce its selection as the sole-provider of powdered activated carbon (PAC) for a large, PRB-burning Midwest utility. The agreement confirms Carbonxt will provide the most cost-effective solution via its specialized PACs for the entire fleet, approximately 2,000 MW of generation.
CEO David Mazyck, PhD, stated, “Carbonxt is excited…
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Gainesville, FL – November 6, 2015 – Carbonxt and United Conveyor Corporation are pleased to announce the recent signing of a contract amendment with a Mid-Atlantic utility. This amendment expands Carbonxt’s existing contract to provide specialized engineered powdered activated carbons (PACs), making Carbonxt the PAC provider for the utility’s entire fleet. Carbonxt CEO David Mazyck, PhD, stated…Click here for full press release
Abstract: “The U.S. Environmental Protection Agency (EPA) and World Health Organization (WHO) along with several published reports have identified mercury as a hazardous air pollutant leading to the EPA establishing Mercury and Air Toxics Standards (MATS) for coal-fired electricity generating units (EGUs) that take effect in 2015. Currently over 50% of the existing coal-fired EGUs based on capacity utilize wet flue gas desulfurization systems (WFGDs) to reduce sulfur dioxide emissions. WFGDs represent existing air quality control devices (AQCDs) that as part of a mercury emissions control strategy, can facilitate EGU mercury compliance.
This white paper focuses on EGUs that contain WFGDs and their utilization as part of a MATS mercury compliance strategy. In particular, our focus is limited to wet-scrubbed units with highly oxidized mercury flue gas entering the WFGD that are not attaining or are only marginally attaining mercury emission limitations.”
Many in the electric generating industry see powdered activated carbon (PAC) for mercury control as a commodity product where in fact incorrect carbon selection could make a difference in your yearly activated carbon costs of several hundred thousands of dollars per year. PACs are different and where they are injected in your power plant can impact their effectiveness and thus yearly costs for compliance. Therefore PAC selection should be based on more than solely cost per pound. This discussion will be based on but not limited to your plant’s coal type, air pollution control devices (existing and planned installations to comply with EPA regulations), fly ash and other by-product salability, and your plant’s overall operations and disposal requirements. Furthermore, activated carbon manufacturing and its properties will be reviewed.
The EPA refers to activated carbon as “the most successfully demonstrated mercury-specific control technology” that also has minimal installation requirements. Within this industry, bromine and other halogens are typically applied to the activated carbon to enhance mercury oxidation and capture. However, the corrosive nature of these additives has the potential to cause larger issues for power plants with extended use. Carbonxt testing with carbon tailoring and alternative additives have shown to achieve the same or better performance results while maintaining the integrity of the plant. Recent full-scale tests have been conducted that include a span of coal and boiler types, injection location/particulate control configurations, injection rates, and concentration of SO3 (inherent and injected for flue-gas conditioning). This presentation will review the mercury control performance and operational impacts, including particle emissions and fly ash utilization, of these recent test events.
With the introduction of the first national standards for mercury pollution from power plants in December of 2011, many facilities will turn to activated carbon injection to meet the regulatory demands. Activated carbon injection is a mature technology that is widely available and proven for achieving mercury removal greater than 90%. In anticipation of the need, Carbonxt has developed powdered activated carbon for mercury removal from coal-fired power plant flue gas. This product stands apart from most available mercury control sorbents in that is it non-halogenated. The Carbonxt product has been tested using full-scale activated carbon injection studies under various conditions. The testing includes a span of coal and boiler types, injection location/particulate control configurations, injection rates, and concentration of SO3 (inherent and injected for flue-gas conditioning). This presentation will review the mercury control performance and operational impacts, including particle emissions and fly ash utilization, of these recent test events.