Environmental Solutions
Fig. 2. A new generation of high capacity anion exchange columns enable lower eluent flow rates and less solvent consumption
was set up to provide a multi-agency response to major air quality incidents, is using sophisticated mobile units from ET as a core strategy component. The company was selected for the multi-million pound
project after a competitive pitch involving a complex brief. The air quality monitoring specialist is providing two bespoke, well-equipped vehicles that use groundbreaking technologies and meet stringent requirements, such as weight and power restrictions. “In the event of a major incident the Air Quality Cell will
be convened, and rapid response measures including vehicle deployment, are implemented,” explains Gillian Hickey from the Environment Agency. “The mobile stations need to be in situ, gathering data and samples for analysis, within hours of the initial alert. In the US, GE Energy has won a contract to provide
continuous emissions monitoring systems (CEMS) and data acquisition and handling systems (DAHS) for Conectiv’s new state-of-the-art, combined-cycle power generating facility in Delta, Pennsylvania. Included in the contract is: system engineering, equipment fabrication, installation supervision and start-up for three CEMS systems; monitoring of nitrogen oxides, carbon monoxide, ammonia and oxygen; collection and archiving of data for environmental reporting; preparation of Conectiv’s reports required under federal and state emission regulations; and assembly of accessories building and installation of power distribution and cable management systems for DCS and UPS equipment “We chose the GE team because they listened to our needs
and acted like a partner with us,” says Dave Sears, electrical engineer with Conectiv. “They helped us address technical issues and suggested alternatives to our plans that helped us maximise our efficiency, improving the project overall.” Increased environmental awareness and stricter legal
regulations/enforcement have led to an expanding need for CEMS and DAHS worldwide. According to a 2009 ARC Advisory Group study , the world market for CEMS is expected to experience compounded annual growth rates (CAGR) of roughly 10 per cent over the next five years.
Under the Obama administration, increased enforcement of environmental regulations is expected to further grow the CEMS market in 2010 and beyond. Expected for completion in 2010, Conectiv’s new facility
features combined-cycle power generators capable of producing 545 MW of electricity. The combustion turbines can run on natural gas or low sulphur diesel fuel oil. In turn, the hot exhaust from these gas turbines is used to power the steam turbines. This highly fuel-efficient system consumes 20-30 per cent less fuel than traditional fossil-fired boiler/ steam turbine generator plants, and emits almost non- detectable levels of volatile organic emissions and carbon monoxide. These comparatively low levels are maintained with the use of low NOx burners, water injection, selective catalytic reduction and premium fuels. “The Delta combined-cycle plant is a great example of
Conectiv’s innovation and commitment to doing business in a way that’s environmentally responsible,” says David Divito, product line leader for GE Energy Services. “We’re thrilled to be able to help with this exciting project.” New legislation such as the Clean Air and Water Act and
a general trend towards green chemistry stipulate the use of environmental friendly chemical products and processes. Metrohm has responded to this introducing a new generation of high capacity anion exchange columns. The new columns feature an inner diameter of only two mm enabling lower eluent flow rates and less solvent consumption (Fig. 2). Moreover, environmentally benign carbonate/
bicarbonate solutions are used with the columns for most anion separations. Not only the columns got thinner but also the suppressor module was scaled down, leading to reduced consumption of regenerant solution: for complete regeneration, as little as 2mL acid (1mol/L) is sufficient and no exchange of cartridges or membranes is necessary. Besides the ecological benefits, microbore columns require
less frequent eluent preparation and thus improve accuracy and save time. Additionally, they get along with only small amounts of sample material and can be perfectly interfaced with various inline detectors. n
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