Is the CTC Number the Best Indicator for Measuring the Effectiveness of Odor Control?
When comparing air filtration solutions, the industry standard for measuring the efficacy of activated carbon is the carbon tetrachloride (CTC) number. This number describes the internal porosity of materials which is supposed to be an indicator for how effectively it can trap gases. However, testing shows this number has no direct scientific correlation to removing the broad range of volatile organic compounds (VOCs) commonly-encountered by end-users.
A Better Way to Measure
Purafil is focused on providing filtration solutions that take a holistic approach to improving air quality. In this pursuit, we have found that Toluene testing data is significantly more relevant in describing the VOC adsorption capability of materials. Toluene is an indicator gas for the wide variety of organic contaminants faced in commercial and wastewater gas filtration applications. By testing for adsorption of this aromatic VOC, you can more accurately predict how effectively the filtration media will eliminate odors, a metric certainly more relevant to the customer.
The Science Behind Our Method
Breakthrough results show our new activated carbon product (AC Pellet) has comparable VOC removal performance to carbon products of CTC 50-60 activity. Another interesting takeaway is that higher CTC value carbon can display smaller removal capacities for VOCs than lower CTC carbon which is supported by third-party testing as well. This is because true VOC removal performance depends on other material properties including pore size and carbon type. Overall, the calculated toluene capacity of AC Pellet offers comparable performance to extruded carbon and will often outcompete some carbon adsorbents.
The Purafil Peace of Mind has its foundation in our patented filtration media, proudly made in our Doraville, Georgia headquarters. From diagnosis of your particular issue to media design, manufacturing, and monitoring, our process ensures your facility is kept free from harmful air pollutants that can reduce the lifespan of your equipment, cause odor complaints, […]
On April 23, 2019, Purafil was presented with its official International Organization of Standardization (ISO) 17025:2017 lab accreditation certificate. This accreditation effort was led by our Laboratory Operations Manager, Chelsea Newton, and establishes that our processes and procedures exceed the American Association for Laboratory Accreditation’s (A2LA) impeccable standards. ISO 17025 accreditation is a big deal—to […]
It’s no secret that harsh chemicals are used in the manufacturing of everyday products, and they’re even used to treat the water we drink. However, when these chemicals are gathered on an industrial scale, they can pose a potential threat to onsite employees and the local community. Unfortunately, this situation is more common than you […]