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Your search keyword '"Grenfell, Robin"' showing total 3 results
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3 results on '"Grenfell, Robin"'

1. A protocol for carbon emissions accounting in infrastructure decisions.

Author

Moir, Stuart, Grenfell, Robin, Johnson, Adrian, and Jowitt, Paul

Subjects
*CLIMATE change, *INFRASTRUCTURE (Economics), *GREENHOUSE gases, *CARBON dioxide, *DECISION making
Abstract

Concerns about climate change have resulted in a need to address the whole-life atmospheric impact of infrastructure projects. But if emissions of carbon dioxide and other 'greenhouse gases' are to be included in overall project appraisals, what spatial and temporal boundaries should be used in assessing emissions, and how should the results be included in project decision making? This paper addresses both these issues within the context of UK legislation, proposing a global protocol for 'carbon accounting' based on best practice, but questioning the simplistic concept of 'carbon pricing' as an effective instrument of reducing emissions. [ABSTRACT FROM AUTHOR]

Published
2012
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2. Lab-on-a-Chip GC for Environment Research.

Author

Halliday, Jaydene, Lewis, Alastair C., Hamilton, Jacqueline F., Rhodes, Christopher, Bartle, Keith D., Homewood, Philip, Grenfell, Robin J. P., Goody, Brian, Harling, Alice, Brewer, Paul, Vargha, Gergely, and Milton, Martin J. T.

Subjects
*GAS chromatography, *MEASUREMENT, *VOLATILE organic compounds, *ELECTRONIC modulators, *SEPARATION (Technology), *MICROFABRICATION, *EQUIPMENT & supplies
Abstract

This article reports the early development of a microfabricated comprehensive gas chromatography(GC) system suitable for the separation of volatile organic compounds (VOCs) and competitive for uses as a portable measurement device. Thus low-power device showed good separation performance for a small set of VOCs and sub-ng detection sensitivity to monoaromatics. Comprehensive GC separation was achieved by coupling the primary column to the secondary via a differential flow modulator. Preliminary results from the 2D separation of gas mixes of several of gas mixes of several VOCs in the ppm range are promising. [ABSTRACT FROM AUTHOR]

Published
2010

3. Microfabricated planar glass gas chromatography with photoionization detection

Author

Lewis, Alastair C., Hamilton, Jacqueline F., Rhodes, Christopher N., Halliday, Jaydene, Bartle, Keith D., Homewood, Philip, Grenfell, Robin J.P., Goody, Brian, Harling, Alice M., Brewer, Paul, Vargha, Gergely, and Milton, Martin J.T.

Subjects
*MICROFABRICATION, *GAS chromatography, *PHOTOIONIZATION, *SEPARATION (Technology), *VOLATILE organic compounds, *HYDROFLUORIC acid, *GLASS, *SURFACES (Technology), *VAN der Waals forces, *DIMETHYLPOLYSILOXANES
Abstract

Abstract: We report the development of a microfabricated gas chromatography system suitable for the separation of volatile organic compounds (VOCs) and compatible with use as a portable measurement device. Hydrofluoric acid etching of 95×95mm Schott B270 wafers has been used to give symmetrical hemi-spherical channels within a glass substrate. Two matching glass plates were subsequently cold bonded with the channels aligned; the flatness of the glass surfaces resulted in strong bonding through van der Waals forces. The device comprised gas fluidic interconnections, injection zone and 7.5 and 1.4m long, 320μm internal diameter capillaries. Optical microscopy confirmed the capillaries to have fully circular channel profiles. Direct column heating and cooling could be achieved using a combination of resistive heaters and Peltier devices. The low thermal conductivity of glass allowed for multiple uniform temperature zones to be achieved within a single glass chip. Temperature control over the range 10–200°C was achieved with peak power demand of approximately 25W. The 7.5m capillary column was static coated with a 2μm film of non-polar dimethylpolysiloxane stationary phase. A standard FID and a modified lightweight 100mW photoionization detector (PID) were coupled to the column and performance tested with gas mixtures of monoaromatic and monoterpene species at the parts per million concentration level. The low power GC-PID device showed good performance for a small set of VOCs and sub ng detection sensitivity to monoaromatics. [Copyright &y& Elsevier]

Published
2010
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