Multi-Metals Continuous Emissions Monitor

Xact® 640 Multi-Metals Monitor

xact-640

Description

Cooper Environmental’s Xact® 640 is the first Multi-Metals Continuous Emissions Monitor to be proven successful for accurately measuring elemental concentrations in smoke stacks by capturing and measuring both particulate and vapor phase metals.

The Xact® 640 system uses reel-to-reel filter tape sampling and nondestructive X-ray fluorescence (XRF) analysis to monitor stack hazardous air pollutant (HAP) metal emissions. An isokinetic sub-sample of stack gas goes into the stilling chamber and then drawn through a chemically reactive filter tape. Vapor phase metals, including mercury, are deposited along with particulate-phase metals on the filter tape.

In 2007, the US EPA recognized the Xact® CEMS as an outstanding achievement in innovative clean air technology with a clean air excellence Award. In addition, the EPA approved the Xact® 640 as an alternative method for periodic Method 29 testing, feed stream analysis, and monitoring emissions during plant operation.

Benefits

  • Single monitor platform for Hg and Hazardous Air Pollutant metals compliance
  • No PM monitor needed to comply with Mercury and Air Toxics Standards
  • May be used to meet 40 CFR Part 60 and 63 regulations
  • Measures total mercury in µg/dscm
  • Saves expenses, time, and resources as compared to Method 29
  • Non-destructive analysis allows for sample archiving
  • Sensitive and reliable (ng/m3 to µg/m3 range)

Features

  • Automatic quality assurance, alarms and control features
  • Gas phase calibration not required
  • Identification and measurement of 23 elements simultaneously (refer to the periodic table on the 640 Spec Sheet below)
  • Internal calibration check incorporated with every sample analyzed
  • Proven RTR XRF technology demonstrated on the ocean floor, Mars, and in thousands of beta attenuation monitors
  • Daily automatic upscale, blank, and flow checks
  • Recognized by the EPA as an innovative clean air technology (Clean Air Excellence Award, 2007)
  • Sampling, analysis, and near-real-time reporting (every 15, 30, 60 and 120 minutes)

Technical Literature

Xact® 640 Spec Sheet

OTM 16: Specs and Test Procedures for XRF Multi-Metals CEMS

OTM 17: Determination of Metal Concentrations Using Filters and Solid Sorbents in XRF Analyisis

OTM 19: Determination of Metal Concentrations in Emissions from Stationary Sources

OTM 20: QA Requirements for XRF Based Multi-Metal CEMS


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Xact® 645 Mercury Monitor

xact-640

Description

Cooper Environmental’s Xact® 645 continuous mercury (Hg) monitor collects and analyzes emission samples for mercury, which can be measured simultaneously using patented reactive filter technology and nondestructive X-ray fluorescence (XRF). A sample of gas is extracted from a source, diluted, and drawn through a chemically reactive filter tape. Vapor phase mercury is deposited along with particulate-phase metals on the filter tape. The deposit is automatically advanced and analyzed by XRF for metals by a proven reel-to-reel tape drive, as the next sample is being collected. Sampling and analysis are performed continuously and simultaneously, except during advancement of the tape (~20 sec) and during daily automated quality assurance checks.

Benefits

  • Can be upgraded to measure additional elements (such as Pb, As, Cr) without extra hardware
  • Maintenance is required only once per month
  • May be used to meet 40 CFR Part 60 and 63 regulations
  • Nondestructive analysis allows for sample archiving
  • Sensitive and reliable (ng/m3 to mg/m3 range)
  • Proven XRF technology

Features

  • Continuous, near-real-time reporting (every 15, 30, 60 or 120 minutes, in μg/dscm)
  • Incorporates an internal standard with every sample analyzed
  • Provides automatic daily upscale, blank, and flow checks
  • Relative accuracy of 3.45%
  • RATA linearity regression R² of 0.9754
  • Automatic quality assurance alarms, and control features

Technical Literature

Relative Accuracy Testing of XRF Mercury Monitor