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so2 renew.pptx

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    AS229

    Ili Arina Anuar

    Ahmad AnharMohd Hanapi

    MONITORING AMBIENT

    AIR (SULPHUR DIOXIDE)

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    highly reactivegasses

    Source fossil fuel combustion at power plants

    other industrial facilities fertiliser manufacturing, aluminium smelting and steel making

    coal and oil (for example, coal being burnt in a home fireplace for heating and diesel-powered vehicles).

    Natural sources - geothermal activity

    One of thecriteriapollutants

    as the indicatorgaseous sulfuroxides (SOx).

    SO2

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    5minutes

    - 24

    hours

    adverserespiratory

    high concentrations ofSO2formation of other SOx

    SOx can reactwith other

    compounds

    penetratedeeply into

    sensitive partsof the lungsand can cause

    or worsenrespiratory

    disease, suchas ecosystems

    acid rain affect

    vegetationaround

    industrialdischarges and

    in cities

    v s l ty

    Hazereduce

    visibility.

    EFFECTS

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    MAIN COMPONENTS OF

    UV ANALYZER

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    Pneumaticsystem

    sample inletline

    particulate filter

    hydrocarbon

    scrubber/kickerdryer (if

    needed)

    sample cell

    reactionchamber

    flowmeter

    pump

    Analyticalsystem

    UV source withthe associatedsource filters,lenses, and

    optics light baffles

    detector(photomultipliertube)

    bandpassfilters.

    Electronichardware

    consists of theelectroniccomponentsthat control the

    analyzer andprocess thesignals.

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    UV SAMPLERCOMPONENTS

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    Instrumentshelter

    Calibrationsystem

    Data

    acquisitionsystem(DAS)

    Wiring,

    tubing &fittings

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    OPERATING PRINCIPLE

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    Measures emitted fluorescence of SO2produced by theabsorption of uv light

    Narrow band-pass filter mirror allows only light wavelengths of190 to 230 nm to pass into the fluorescent chamber

    The SO2molecules absorbed are excited by UV light and emit acharacteristic decay radiation

    A second filter allows only this decay radiation to contact aphotomultiplier tube (PMT). Electronic signal processingtransfers the light energy impinging on the PMT into a voltage

    which is directly analyzed

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    SO2 +h1 SO2 *SO2 +h2 where:

    Where h1 = incidence l ight,

    h2 = fluoresced light

    SO2* = SO2 in its excited state

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    METHODS FOR UVSAMPLER

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    In sample mode, the sample isdrawn into the analyzer through the

    sample bulkhead.

    The sample flows through a

    hydrocarbon kicker (scrubber) whichallows only hydrocarbon moleculesto pass through the tube wall.

    The sample flows into thefluorescence chamber, wherepulsating UV light excites the SO2molecules.

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    The band pass filter allows only thewavelengths emitted by the excitedSO2 molecules to reach the PMT. The

    PMT detects the UV light emissionfrom the decaying SO2 molecules

    The sample then flows through a flowsensor

    Outputs the SO2concentration to thefront panel display and the analog ordigital outputs.

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    http://www.epa.gov/airquality/sulfurdioxide/

    http://www.mfe.govt.nz/issues/air/breathe/sulphur-

    dioxide.html

    http://www.epa.gov/airquality/sulfurdioxide/basic.html

    http://www.epa.gov/airquality/sulfurdioxide/health.html

    http://www.cleanairtrust.org/sulfurdioxide.html

    http://www.mfe.govt.nz/issues/air/breathe/sulphur-

    dioxide.html

    http://www.epa.gov/airquality/sulfurdioxide/implement.html

    http://www.epa.gov/airquality/sulfurdioxide/http://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.epa.gov/airquality/sulfurdioxide/basic.htmlhttp://www.epa.gov/airquality/sulfurdioxide/health.htmlhttp://www.cleanairtrust.org/sulfurdioxide.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.epa.gov/airquality/sulfurdioxide/implement.htmlhttp://www.epa.gov/airquality/sulfurdioxide/implement.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.cleanairtrust.org/sulfurdioxide.htmlhttp://www.epa.gov/airquality/sulfurdioxide/health.htmlhttp://www.epa.gov/airquality/sulfurdioxide/basic.htmlhttp://www.epa.gov/airquality/sulfurdioxide/basic.htmlhttp://www.epa.gov/airquality/sulfurdioxide/basic.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.mfe.govt.nz/issues/air/breathe/sulphur-dioxide.htmlhttp://www.epa.gov/airquality/sulfurdioxide/http://www.epa.gov/airquality/sulfurdioxide/

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