Emissions Calculation
Emissions Calculation - Related Videos
08:18
Design and Use of a Full Flow Sampling System (FFS) for the Quantification of Methane Emissions
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Cited by 13 •
2016
We have designed, developed, and implemented a novel full flow sampling system (FFS) for quantification of methane emissions and greenhouse gases from across the natural gas supply chain.
02:39
Emission Spectra
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2020
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present. In contrast to continuous spectra, light can also occur as discrete or line spectra having very narrow linewidths interspersed throughout the spectral regions. Exciting a gas at low partial pressure using an electrical current,...
02:47
Metal Flame Emission - Concepts
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2020
Metal Flame Emission Flame testing is an analytical technique where a sample is placed in a flame, and the characteristic flame color is used to identify the substance. Each element has a characteristic light emission when placed into a flame, meaning each element produces a unique color. This phenomenon is used in fireworks displays, where the color of the fireworks corresponds to a specific characteristic of a metal. The emission of colored light from a burning sample is the direct result of...
07:27
Metal Flame Emission - Student Protocol
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2020
Source: Smaa Koraym at Johns Hopkins University, MD, USA Metal Flame Emission TestingExpand In this lab, you will excite the electrons of six metal chloride salts with heat from a flame and measure the wavelength of light emitted by the relaxing electrons. The emitted light is in the visible spectrum, so you will see different colored flames for the different metals. At the end of the lab, you will measure the emission spectrum of a sparkler and use the data you collected from the metal...
02:46
Calculating the Equilibrium Constant
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2020
The equilibrium constant for a reaction is calculated from the equilibrium concentrations (or pressures) of its reactants and products. If these concentrations are known, the calculation simply involves their substitution into the Kc expression. For example, gaseous nitrogen dioxide forms dinitrogen tetroxide according to this equation: When 0.10 mol NO2 is added to a 1.0-L flask at 25 °C, the concentration changes so that at equilibrium, [NO2] = 0.016 M and [N2O4] = 0.042 M. The value of the...
FAQs
The choice of emission factor must match the activity data and the reporting target. Fuel consumption, electricity use, and materials processed represent different activity types, while the result may need to express greenhouse gases as carbon dioxide equivalent or report another pollutant separately. Matching these elements keeps calculated totals interpretable for environmental assessment.
They determine which sources are included and how results are organized. A calculation can focus on an organization’s operations, a defined process, or a broader set of activities, then separate emissions by scope. Changing that boundary can change the reported total without any physical change in emissions, so comparisons require consistent scope.
Activity data anchors each estimate to a measurable source, such as fuel use, electricity consumption, or materials processed. If these amounts are missing or grouped inconsistently within a defined boundary, source-level contributions become harder to identify and changes over time harder to interpret. Recording data by source supports both calculation and environmental diagnosis.
Start by defining the sources, boundary, pollutant, and reporting unit, then gather activity data for each relevant source. Select emission factors that correspond to those activities, calculate the resulting quantities, and organize the totals by source or scope. Reviewing the largest contributors afterward helps connect the inventory with possible reduction strategies.
The method supports several distinct activities, including regulatory reporting, life-cycle assessment, emissions inventories, and climate planning. It can describe emissions from an organization, process, or set of activities, depending on the chosen boundary. Organizations can also use repeated calculations to evaluate whether a planned strategy changes the environmental impact associated with major sources.
Organizing results by source, boundary, or scope reveals which activities contribute most to the reported total. That information helps decision-makers focus assessment and reduction efforts where they may have the greatest relevance, rather than treating all sources identically. Repeating the calculation over time also provides a basis for tracking changes and evaluating interventions.