Effects of Configuration and Headspace Mixing on the Accuracy of Closed Chambers for DairyFarm Gas Emission Measurement

2015 ◽  
pp. 153-162 ◽  
Keyword(s):  
Emission Measurement ◽  
Gas Emission ◽  
Closed Chambers

scholarly journals SO2 EMISSION MEASUREMENT BY DOAS (DIFFERENTIAL OPTICAL ABSORPTION SPECTROSCOPY) AND COSPEC (CORRELATION SPECTROSCOPY) AT MERAPI VOLCANO (INDONESIA)

2010 ◽  
Vol 8 (2) ◽  
pp. 151-157 ◽  
Author(s):  
Hanik Humaida
Keyword(s):  
Optical Absorption ◽  
Absorption Spectroscopy ◽  
Spare Part ◽  
Correlation Spectroscopy ◽  
Differential Optical Absorption Spectroscopy ◽  
Optical Absorption Spectroscopy ◽  
Emission Measurement ◽  
Gas Emission ◽  
So2 Emission ◽  
So2 Gas

The SO2 is one of the volcanic gases that can use as indicator of volcano activity. Commonly, SO2 emission is measured by COSPEC (Correlation Spectroscopy). This equipment has several disadvantages; such as heavy, big in size, difficulty in finding spare part, and expensive. DOAS (Differential Optical Absorption Spectroscopy) is a new method for SO2 emission measurement that has advantages compares to the COSPEC. Recently, this method has been developed. The SO2 gas emission measurement of Gunung Merapi by DOAS has been carried out at Kaliadem, and also by COSPEC method as comparation. The differences of the measurement result of both methods are not significant. However, the differences of minimum and maximum result of DOAS method are smaller than that of the COSPEC. It has range between 51 ton/day and 87 ton/day for DOAS and 87 ton/day and 201 ton/day for COSPEC. The measurement of SO2 gas emission evaluated with the seismicity data especially the rockfall showed the presence of the positive correlation. It may cause the gas pressure in the subsurface influencing instability of 2006 eruption lava.   Keywords: SO2 gas, Merapi, DOAS, COSPEC

scholarly journals Methodology for Measuring Greenhouse Gas Emissions from Agricultural Soils Using Non-isotopic Techniques

2021 ◽  
pp. 11-108
Author(s):  
M. Zaman ◽  
K. Kleineidam ◽  
L. Bakken ◽  
J. Berendt ◽  
C. Bracken ◽  
...  
Keyword(s):  
Agricultural Soils ◽  
Cost Effective ◽  
Emission Measurement ◽  
Closed Chamber ◽  
Advantages And Disadvantages ◽  
Flux Measurements ◽  
Cost Effective Alternative ◽  
User Friendly ◽  
Closed Chambers

AbstractSeveral approaches exist for measuring greenhouse gases (GHGs), mainly CO2, N2O, and CH4, from soil surfaces. The principle methods that are used to measure GHG from agricultural sites are chamber-based techniques. Both open and closed chamber techniques are in use; however, the majority of field applications use closed chambers. The advantages and disadvantages of different chamber techniques and the principal steps of operation are described. An important part of determining the quality of the flux measurements is the storage and the transportation of the gas samples from the field to the laboratory where the analyses are carried out. Traditionally, analyses of GHGs are carried out via gas chromatographs (GCs). In recent years, optical analysers are becoming increasingly available; these are user-friendly machines and they provide a cost-effective alternative to GCs. Another technique which is still under development, but provides a potentially superior method, is Raman spectroscopy. Not only the GHGs, but also N2, can potentially be analysed if the precision of these techniques is increased in future development. An important part of this chapter deals with the analyses of the gas concentrations, the calculation of fluxes, and the required safety measures. Since non-upland agricultural lands (i.e. flooded paddy soils) are steadily increasing, a section is devoted to the specificities of GHG measurements in these ecosystems. Specialised techniques are also required for GHG measurements in aquatic systems (i.e. rivers), which are often affected by the transfer of nutrients from agricultural fields and therefore are an important indirect source of emission of GHGs. A simple, robust, and more precise methodof ammonia (NH3) emission measurement is also described.

Greenhouse gas emission measurement and economic analysis of Iran natural gas fired power plants

Energy Policy ◽  
2013 ◽  
Vol 60 ◽  
pp. 200-207 ◽  
Author(s):  
H. Shahsavari Alavijeh ◽  
A. Kiyoumarsioskouei ◽  
M.H. Asheri ◽  
S. Naemi ◽  
H. Shahsavari Alavije ◽  
...  
Keyword(s):  
Natural Gas ◽  
Economic Analysis ◽  
Greenhouse Gas ◽  
Power Plants ◽  
Greenhouse Gas Emission ◽  
Emission Measurement ◽  
Gas Emission

Soil gas emission measurements in long term tillage experiments

2005 ◽  
Vol 33 (1) ◽  
pp. 373-376 ◽  
Author(s):  
Péter Hegymegi ◽  
Anita Gál ◽  
Imre Czinkota ◽  
Tony Vyn
Keyword(s):  
Soil Gas ◽  
Gas Emission

Investigation of Cases of Toxic Gas Emission when Conducting Blasting Operations in JSC Karelsky Okatysh

2020 ◽  
pp. 57-62
Author(s):  
R.A. Gilmanov ◽  
◽  
A.A. Bulbashev ◽  
I.A. Bulbasheva ◽  
◽  
...  
Keyword(s):  
Gas Emission ◽  
Toxic Gas

Gas emission trends in production faces

2019 ◽  
Vol 144 (2/2019) ◽  
pp. 52-55
Author(s):  
V.N. Kosterenko ◽  
R.O. Smirnov ◽  
Z.V. Aksyonov
Keyword(s):  
Gas Emission
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