How does the M-PACT ACI system work?

The M-PACT ACI system features on-board activated carbon storage and an integrated metering and conveyance system. It can receive sorbent via gravity feed or pneumatic conveying from local silos, bulk bags, or remote tanks. Injected carbon adsorbs mercury in the flue gas stream, and the resulting solids are collected downstream.

What pollutants can be reduced with Activated Carbon Injection?

ACI is primarily used to reduce mercury emissions from industrial combustion sources. By injecting powdered activated carbon into flue gas, mercury is adsorbed onto the carbon particles and removed through particulate collection equipment, aiding compliance with regulatory emission limits.

What are the benefits of using UCC’s M-PACT ACI system?

UCC’s M-PACT ACI system offers a compact, modular, and turnkey design with integrated sorbent storage, accurate metering, and flexible feed options. Its design simplifies installation, reduces operational complexity, and supports reliable mercury emission control performance.

Which regulations relate to Activated Carbon Injection use?

ACI technologies are commonly implemented to help facilities comply with the EPA’s Mercury and Air Toxics Standards (MATS) under the Clean Air Act, which limits hazardous air pollutant emissions, including mercury, from power plants and other industrial sources.

Can ACI systems be integrated with other air pollution control equipment?

Yes. ACI systems are often configured to work in conjunction with existing particulate control devices such as baghouses and electrostatic precipitators, allowing the injected activated carbon to be captured along with fly ash particles in the flue gas.

Activated Carbon Injection

Activated Carbon Injection Systems for Hg Removal

UCC’s Activated Carbon Injection (ACI) system, the M-PACT™ is a compact, modular unit designed by Albemarle to provide cost-effective PAC (powder activation carbon) utilization. Its stand-alone design is equipped with on-board PAC storage that incorporates both the metering and conveyance operations of ACI into a skid configuration.

How Does M-PACT Work?

A six door configuration allows for easy and safe access to its equipment and instrumentation. The M-PACT is programmed to receive sorbent in a number of ways including gravity feed from local silos, bulk bags or pneumatically from remote tanks or silos. Its small footprint allows for installation on existing slabs or platforms and in areas where headroom is restricted.

Regulation Update Announcement

The Environmental Protection Agency (EPA) oversees the Mercury and Air Toxics Standards (MATS) as part of the Clean Air Act, aimed at limiting hazardous air pollutants, particularly mercury, emitted by power plants. Recently, the EPA strengthened the MATS rule, focusing on reducing mercury emissions from existing lignite-fired power plants. The updated regulation requires these plants to meet stricter mercury emission limits, set at 1.2lb/TBtu, down from the previous 4.0lb/TBtu. Affected facilities are given a three-year grace period from the effective date to achieve compliance with the revised standards.

> View Summary Rule

Request UCC's MATS Breakdown Brochure

Performance Specs

The M-PACT™ can be used alone or in conjunction with storage silos for activated carbon injection applications. Its storage bin holds nominally 4,000 pounds of sorbent, therefore the refill requirements are low. It is equipped with either a single feed train (feeder and pneumatic conveying system) or multiple independent feed trains that can be used to provide 100% redundancy or independently to feed sorbent to different locations. The single feed train configuration is generally provided with a redundant conveyance blower.

A programmable logic controller (PLC) allows the bin to be refilled from silos, bulk trailers, and bulk-bags via gravity feed or pneumatic conveying. High-quality gravimetric feeders are used to provide unparalleled PAC metering accuracy to support precise activated carbon injection. The nominal maximum feed rate per feeder is 500 lb/hr with a 10:1 turndown ratio.

This unit is fully functional upon leaving the factory, as it is equipped with pressure transmitters on the eductors, weight decks on the feeders, feeder hopper Hi Hi Level switches, a bin level transmitter, bin level switch, bin pressure switch and automatic actuated valves for storage bin and feeder hopper refill. Field installation requires only one power feed, one plant airline and a connection to conveyance piping. The M-PACT’s standardized design and turn-key approach allows for fast delivery and installation.

Frequently Asked Questions

What is Activated Carbon Injection (ACI)?

Activated Carbon Injection (ACI) is an air pollution control technology that injects powdered activated carbon into flue gas to capture and remove mercury and other hazardous pollutants before they exit the stack. ACI helps facilities achieve emissions compliance with regulations such as the EPA’s Mercury and Air Toxics Standards (MATS).

How does UCC’s ACI system (M-PACT™) work?

UCC’s ACI solution, the M-PACT™, is a compact modular system that integrates PAC storage, metering, and conveyance in a skid-mounted unit. Sorbent can be fed into the system by gravity from silos or bulk bags, or pneumatically from remote storage. The carbon is then precisely injected to optimize mercury or other pollutant capture.

What pollutants can ACI control?

ACI is primarily used to capture mercury (Hg) from flue gas streams, which is a regulated hazardous air pollutant under federal standards like MATS. The injected carbon adsorbs mercury compounds, allowing them to be collected in downstream particulate control equipment such as baghouses or electrostatic precipitators.

Why is mercury control important for emissions compliance?

Mercury is a toxic pollutant regulated by the U.S. Environmental Protection Agency because of its harmful health and environmental effects. Stricter mercury limits (e.g., under MATS) require effective mitigation technologies like ACI to help facilities meet compliance deadlines and avoid penalties.

How does ACI support regulatory compliance?

ACI helps industrial facilities meet stringent mercury emission limits set by regulations such as the EPA’s Mercury and Air Toxics Standards (MATS) under the Clean Air Act. Effective mercury capture with ACI can be a key part of a facility’s overall compliance strategy.

How can we help?

Our team of experts are happy to help answer any questions you have about UCC’s air solutions.

UCC Environmental (UCC) is a global leader in environmental solutions and replacement parts for solids handling, wastewater treatment, and air pollution control technologies in power generation, mining, steel and other heavy industrial markets.

Quicklinks

News & Events

UCC Environmental Announces Key Partnership with Kingfisher Industrial

February 4, 2026

Water Treatment System Replacement Parts

January 15, 2026

Contact Info

847 473 5900

contactucc@uccenvironmental.com

2100 Norman Dr, Waukegan, IL 60085

Water Treatment Solutions Quote

URL
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Name*
First Last
Industry*
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
Water Treatment System*
RO Model Type / Number*
EDI Model Type / Number*
CAPTCHA

UCCI

URL
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

UCC PLAKON

URL
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Measure What Matters - Wear, Downtime, Dollars

Phone
This field is for validation purposes and should be left unchanged.
Name*
First Last
Company*
Industry*
Email*
Phone*
Comments
CAPTCHA

Architectural Engineering and Engineering Procurement and Construction

Comments
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Microelectronics

Comments
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

General Inquiries (Steel)

Steel General Request Form

Facebook
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Project Execution

Project Execution Request Form

Instagram
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Mobile Solutions Request Form

Facebook
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA
This field is hidden when viewing the form
UTMcookie

Parts & Products General Request Form

Facebook
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Name*
First Last
Industry*
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Engineered System Components

URL
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Air Pollution Control Components

Name
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Tanks/Vessels

Facebook
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Separating Equipment/Dewatering Bins and Sludge Containers

Phone
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Prime Movers

Instagram
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Pipe Fittings

URL
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Mixers/Unloaders

Company
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
- Request Technology Brief
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Mechanical System Components

Facebook
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Gates/Valves

URL
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch and Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Parts & Products Request Form - Crushers

X/Twitter
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
- Request a Data Sheet
- Request a Case Study
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Service Solution General Request Form

Phone
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Solids General Request Form

Comments
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Water General Request Form

Phone
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Air General Request Form

Phone
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA
This field is hidden when viewing the form
UTM Information

Mining Solids Handling Request Form

Email
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Mining Chemical Treatment and Water Sampling Request Form

Email
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Mining Parts & Products Request Form

Facebook
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Mining Mobile Solutions Request Form

Name
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Mining Groundwater Remediation Request Form

LinkedIn
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Mining Dewatering Request Form

Email
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Mining WWT General Request Form

X/Twitter
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA

Power General Request

Name
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Phone
Email*
CAPTCHA

Mining General Request Form

Phone
This field is for validation purposes and should be left unchanged.
Request A Brochure or Quote
Type of Request*
- Request a Quote
- Request a Call with UCC
- Request a Lunch & Learn Presentation
Industry*
Name*
First Last
Company*
Site Location (Country)*
Site Location (State)*
Phone*
Email*
CAPTCHA