POWER October 2014 - 65

MERCURY CONTROL
Table 3. Comparative economics for a 315-MW unit burning eastern bituminous
coal. Source: Novinda
Case
Multi-product
solution
Product
SO3-tolerant PAC
Hydrated lime
CaBr2
Novinda
single-product
of climate change concerns, Novinda commissioned
CH2M HILL to compare the
greenhouse gas (GHG) emission impacts
for production of Amended Silicates versus
PAC.
Life-cycle GHG emissions for Amended
Silicates were estimated using process-specific
data and the GaBi 4 life-cycle assessment
(LCA) software. These results were
compared with existing literature values for
production and use of PAC. The LCA included
mining, manufacturing, use in a power
plant, disposal, and transportation of materials
between each step in the process. The
LCA concluded:
■ Per pound of material produced and used,
GHG emissions associated with Amended
Silicates are 11% of the average literature
values for GHG emissions of PAC.
■ The use of Amended Silicates would
deliver a potential reduction in carbon
dioxide-equivalent (CO2
e) emissions of
174,000 metric tons per year if just 10% of
the market substituted Amended Silicates
for PAC, based on Novinda estimates of a
total mercury sorbent market of 225,000
metric tons per year.
■ The ability to reuse fly ash results in avoided
GHG emissions of an estimated 91 lb. of
CO2
e for each pound of Amended Silicates
used, or 1.03 million metric tons per year
of avoided CO2
e emissions, based on the
AS-HgX
Injection rate (lb/hr) Product cost Cost/hour Annual cost
$1.10/lb
330 (est.)
1,200 (est.)
400
220
$0.0625/lb
$0.90/lb
Total
$1.10/lb
$363.00
$75.00
$360.00
$438.00
$242.00
$3,069,504
$1,695,936
The full report is available at http://bit.
ly/1p8w918.
A Cost-Effective Solution
The EPA's MATS regulation for control of
mercury emissions requires technology at
most coal-fired plants to capture vapor-phase
mercury in the emissions control train. Options
include the injection of sorbents, the
use of additives to oxidize elemental mercury
for capture in wet FGDs, and other specialized
hardware solutions. Most common
will be the use of injected sorbents such as
Amended Silicates or PAC, which represent
a low-capital expense approach.
Novinda's Amended Silicates product
line offers a viable alternative to PAC for
compliance with MATS. For most plant
configurations Amended Silicates is costeffective,
generates low balance-of-plant
impact, and preserves the value of fly ash
for resale. ■
-Jim Butz is vice president product management
for Novinda Corp. in Denver.
assumption that only 50% of fly ash is reused
and the same Amended Silicates 10%
market usage with an average Amended
Silicates content of 1% in the fly ash.
MATS
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October 2014 | POWER
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Compliance
Group
A Service of Power & Industrial Services Corporation
MATS Compliance Group is an expert team of
experienced testing and combustion optimization engineers
with the testing equipment and expertise to help customers
achieve MATS compliance.
Achieving MATS compliance can mean many things to power
generators. From the initial stages of testing and demonstration
testing to ongoing compliance testing, and remediation, it takes
an integrated approach.
The MATS Compliance Group provides a complete package
of testing, inspection, calibration and boiler tuning services
to assist in achieving compliance. With procedures such as
onsite mercury analysis, the experienced engineering staff
of the MATS Compliance Group is well suited to provide both
standalone testing services, as well as overall compliance
consultation and project management.
Please visit our website for a complete list of our testing and
combustion services.
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and Optimize Performance
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POWER October 2014

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