Thermal Oxidizers for VOC & Odor Control
Exceeding EPA Standards with Industry-Leading Vapor Control
The U.S. Environmental Protection Agency (EPA) and Environment and Climate Change Canada (ECCC) recognize thermal oxidation as Best Available Control Technology (BACT) and Best Available Technique (BAT) for volatile organic compound (VOC) destruction. Facilities generating VOCs from tank degassing, pipeline maintenance, refinery turnarounds, or chemical processing operations must treat these emissions before atmospheric release to satisfy Clean Air Act requirements and state air quality permits.
Envent’s specialized fleet of mobile thermal oxidizers handles the most volatile and toxic industrial vapor streams, maintaining strict compliance with EPA Maximum Achievable Control Technology (MACT) standards, BACT requirements, and local air quality regulations across the United States and Canada.
The Power of Thermal Oxidation
Thermal oxidation destroys harmful VOCs through controlled, high-temperature combustion at 1,400°F minimum chamber temperature. The process converts hydrocarbon pollutants into water vapor (H₂O) and carbon dioxide (CO₂) through complete molecular oxidation, eliminating toxic compounds before atmospheric discharge.
High-Temperature Destruction: Envent’s units operate above 1,400°F and reach greater than 99.9% destruction efficiency (DRE).
Precision Engineering: Each oxidizer is built for exact temperature, residence time, and turbulence to guarantee complete vapor destruction and dependable uptime.
Versatile Handling: We handle complex streams including anhydrous ammonia, hydrogen sulfide (H₂S), benzene, butadiene, and chlorinated hydrocarbons.
Envent Mobile Thermal Oxidizer System (EMTOS)
Advanced Features of Envent’s Thermal Oxidizer Fleet
- Fleet Versatility: With burner capacities from 1.5 MMBTU to 77 MMBTU, we provide the right unit for every application, avoiding “one-size-fits-all” setups.
- Regulatory Compliance: Every EMTOS unit meets or exceeds BACT and MACT standards under the Clean Air Act. We destroy hazardous air pollutants (HAPs) to levels that surpass regulatory expectations.
- Transparency: Systems are equipped with temperature chart recorders and digital performance logs to provide proof of performance for regulators.
Partner with the Industry Leader
When compliance, reliability, and safety are non-negotiable, Envent delivers. Our EPA-compliant systems meet and exceed MACT and BACT standards, ensuring every project is executed with precision.As the only provider in the industry with certified safety credentials for mobile thermal oxidation, we offer more than just equipment,we provide peace of mind.
Envent meets the EPA’s BACT and the Canadian BAP requirements and has earned the ‘Thermal Oxidizer’ designation.
EMTOS and EMECS Advantages
Key features include:
- On-site destruction of all vapors with verified safety controls
- Third-party: testing confirming destruction efficiencies greater than 99%.
- Secure Data: Certified emissions data is uploaded to our eReport Client Portal for full regulatory documentation.
- High Capacity: Burner capacities up to 77 MMBTU provide the fastest turnaround times in the industry. For larger projects, multiple units can run in parallel.
- Sealed Operations: Safe, sealed connections to vessels during plant turnarounds ensure no fugitive emissions.
What Our Clients Say
Featured Case Studies
The Problem: A propane line needed urgent degassing for repairs. As a highly flammable gas that is heavier than air, any leak posed a major fire risk. Furthermore, the mercaptan odorant meant even minor releases would trigger public complaints and regulatory issues. The facility had to clear the line quickly without venting.
What We Did: Envent mobilized an EMTOS (Envent Mobile Thermal Oxidizer System) within hours. We used nitrogen to push the propane through the oxidizer at over 1,400°F. Our OQ-qualified technicians reached 99.99% destruction efficiency, neutralizing both the propane and sulfur-based odors.
The Result: The pipeline was cleared safely and on schedule. Envent’s fast response prevented hazardous releases, ensuring 100% regulatory compliance. By destroying vapors and odors at the source, we protected the community and allowed repairs to proceed with zero public impact.
The Problem: A Louisiana facility needed to degas a naphtha storage tank for maintenance. Naphtha is highly volatile and odorous, making the project a high priority for the Louisiana Department of Environmental Quality (LDEQ). The site had to eliminate vapors with high efficiency while preventing odors from reaching the community.
What We Did: Envent deployed an EMTOS (Envent Mobile Thermal Oxidation System) to the site. We built a closed-loop vapor recovery system to pull the naphtha gasses directly into our thermal oxidizer. Our OQ-qualified technicians ran the unit at 1,400°F, reaching 99.99% destruction efficiency. We provided real-time data logs and temperature charts to verify compliance for state regulators.
The Result: The naphtha tank was cleared safely and turned over for work on schedule. Envent’s solution ensured 100% LDEQ compliance and stopped all odor complaints. By using high-temp thermal oxidation, we helped the facility avoid fines and kept the project moving without environmental delays.
Thermal Oxidizers for VOC & Odor Control: Frequently Asked Questions
What is the destruction efficiency of Envent’s thermal oxidizers?
Our mobile systems are engineered to reach operating temperatures above 1,400°F, achieving a Destruction Removal Efficiency (DRE) of 99.9% or greater. This ensures that even the most complex volatile organic compounds (VOCs) are fully neutralized.
How does Envent ensure compliance with EPA and ECCC regulations?
Every Envent Mobile Thermal Oxidizer System (EMTOS) meets or exceeds BACT (Best Available Control Technology) and MACT standards. We provide full transparency through temperature chart recorders and digital data logs, offering verifiable proof of performance for regulators.
What types of chemical streams can your mobile systems handle?
Our technology is versatile enough to manage a wide array of complex and hazardous streams, including anhydrous ammonia, hydrogen sulfide (H₂S), benzene, butadiene, chlorinated hydrocarbons, and high-concentration mercaptans.
What is the capacity range of your mobile fleet?
To avoid a “one-size-fits-all” approach, we maintain a diverse fleet with burner capacities ranging from 1.5 MMBTU to 77 MMBTU. This allows us to scale our response to match the specific flow rates and heat-release requirements of your project.
Can Envent provide emergency vapor control services?
Yes. We operate a 24-hour emergency hotline and can mobilize OQ-qualified technicians and EMTOS units within hours to address pipeline leaks, storage tank issues, or sudden permit excursion risks.
How does thermal oxidation help with odor control?
By destroying sulfur compounds and hydrocarbons at temperatures exceeding 1,400°F, we neutralize odors at the molecular level. This is far more effective than “masking” agents, ensuring zero public complaints during sour crude or naphtha projects.
What is the benefit of a mobile system over a permanent VRU?
Mobile systems provide 100% uptime during permanent VRU maintenance or turnarounds. They offer a versatile, temporary solution for sudden surges in throughput without the multi-million dollar capital investment of permanent infrastructure.
Are your field technicians qualified for high-risk environments?
Every Envent technician is OQ-qualified (Operator Qualified) and trained in rigorous “safety-first” protocols. They have extensive experience managing highly reactive VOCs and toxic emissions in refinery, midstream, and marine settings.
How do you verify performance for regulatory reporting?
We eliminate the guesswork by documenting all performance metrics using calibrated temperature chart recorders and digital data logs. This provides an ironclad audit trail to prove 100% regulatory conformity to state or federal agencies.
Which industries do you serve?
Envent delivers tailored vapor control for the rail, pipeline, clean fuels, crude oil, natural gas, and industrial gas sectors. Our engineers specialize in everything from tank degassing to high-pressure pipeline blowdowns and marine barge loading.
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