Methane gas (CH4) is the second most important greenhouse
gas (GHG) after carbon dioxide (CO2). Methane is more than
25 times more potent than CO2 over a 100-year time period
which has caused environmental concerns in recent years.
from coal occur in several forms:
(CBM) – Coalbed Methane: Methane that is released in coal
(CMM) – Coal Mine Methane: Methane from surface or
underground coal mines that is released to the atmosphere or
captured in advance of, during, or following physical coal
mining activities. CMM occurs from three primary sources:
Degasification systems at active underground mines.
Also commonly referred to as drainage systems.
air methane (VAM). This refers to the very dilute
methane that is released from underground mine
methane (AMM). Closed mines that produce emissions from
vents, pipes and boreholes
The GHGRP Reporting Rule allows mines to use one of two
approaches to calculating emissions. Mines may choose to
measure flow rates and emission concentrations directly to
calculate total emissions. Mines may also choose to use the
air sampling results from the quarterly inspections
conducted by Mine Safety and Health Administration (MSHA).
MSHA regulates in-mine concentrations of ventilation air
using well-defined procedures to ensure that the methane is
well below explosive levels. Mines can access that data for
use in calculating overall emissions.
Issues with GHGRP Data Collection
- Limited data with
quarterly data collection results in limited
understanding of overall methane emissions inventory.
- Current high cost
associated with current data collection methods and data
- Facilities that have
not reported data and may have emissions above the
misunderstood or incorrectly completed the reporting
forms or did not report at all
measurement techniques between facilities.
- Mines may have
adjusted their data using their actual operating
schedule and production rates throughout each quarter.
Better Solutions for Monitoring Emissions
Monitoring methane emissions from CMM sources is expensive,
relies heavily on manpower, is prone to error, and provides
limited data to the end user.
With the advent of the Internet of Things (IoT) cost
effective wireless continuous monitoring solutions are now a
reality. These systems provide sound scientific data through
long-term baseline remote monitoring and real-time analysis.
Remote monitoring system transmits real-time data over
various wireless telemetry options to a cloud based
dashboard allowing experts to analyze problems and abnormal
situations. These man portable systems include integrated
batteries and solar charging providing long-term deployments
in remote locations saving on labor intensive manual data
sampling and costly travel. As a result better data
collection and measurement will improve our understanding of
methane sources and trends, and enable more effective
management of opportunities to reduce methane emissions.
RemoteMonitor CH4 Solution
The RemoteMonitor™ CH4 is a cost effective solution for
real-time continuous methane gas monitoring. Specifically
designed for deployments in remote areas without power or
wired Internet over long periods. Methane data is
transmitted in real-time over Cellular, WiFi, or Satellite
networks to a Cloud Dashboard. Integrated battery and solar
charging allows for long term field deployments.
The RemoteMonitor™ CH4records and transmits methane, barometric
pressure, and system data in real-time to a web based cloud
server which allows instant access to the data via a
standard web browser.
Continuous monitoring is vital for accurate quantification
and overall understanding of emissions. Manual sampling has
been the primary method for measurement. It is difficult to
capture the expected fluctuation in methane concentration
with this method; therefore it imposes a serious limitation
on accurate quantification.
Value of Real-Time Data
Data from the
is captured and transmitted to the cloud in real-time
creating historic graphs for easy viewing. Methane,
atmospheric, and system health data are collected on
intervals from 10-minutes to once a day. The cloud portal
allows for easy management of devices deployed in the field.
Importance of Atmospheric Data Collection
It is important for the
real-time data collection device to capture atmospheric data
to predict methane emissions. The rate of methane emissions
will be strongly influenced by weather conditions. When
barometric pressure is falling methane gas will tend to be
forced out of the surrounding formations a short time period
as new pressure balances are established.
This variability in data is not accounted for with current
quarterly single point data collection methods.
Set Alarm Event