+44 1472 242 244 sales@powair.co.uk
Wholesale Opportunities ... Click Here

The Science of PowAir


Odour Neutralising Science

PowAir odour odour neutralising products consist of complex formulations representing a variety of chemical compounds and offering different functionalities, both structural and chemical.

Chemical reaction odour control

The technology behind PowAir was initiated over 25 years ago. The scientist (who was eventually credited with the invention of PowAir) became fascinated when he observed that when terepenes were diffused into the environment, emission’s and odours were reduced.

Inspired by this finding, further evidence showed that the odours were not just masked but permanently removed. The result was a set of specialised formulations that neutralise a wide spectrum of organic and inorganic odour problems – effectively, efficiently and permanently.

PowAir odour neutralisation formulations have been scientifically engineered to be environmentally safe. Manufactured under strict quality controls, the components of PowAir are generally recognised as common in the food industry and have a long history of safety.


Terpene Remove Odour

Terpenes are widespread in nature, mainly in plants as constituents of essential oils. Many terpenes are hydropocarbons, but oxygen-containing compounds such as alcohols, aldehydes or ketones (terpenoids) are also found. Their building block is the hydrocarbon isoprene, CH2=C(CH3)-CH=CH2*

*Isoprene Rule, Wallach 1887

Terpene Characteristics

  • Terpenes have anti-bacterial, antifungal and anti-septic properties.
  • Terpenes have oxygenating properties (increases oxygen level).
  • When diffused into the environment, terpenes have been found to reduce airborne chemicals and bacteria.
  • Terpene characteristics appear to either destroy the odour molecule or convert it to a more acceptable level.


PowAir the Mechanisms of Action

There are three mechanisms of action that can occur, based on the chemical and physical natures of each terpene and active ingredient versus the organic and inorganic volatile compounds (odours).

Absorption – the attraction of the different reactive sites on the PowAirs active ingredient molecules will attract and non-permanently bind with the low molecular, high weight compound (VOC) aka odours.

Absorb: To retain wholly, without reflection or transmission, what is taken in.

Adsorption – All VOC’s and odourous compounds have a solubility factory in PowAirs active ingredients. This solubility will allow the VOC compound to solubilise itself in the presence of PowAir, relative to the chemistry of the emission, temperature, pH and pressure of the environment . 

Adsorb: To collect and hold (gas or vapour) in the surface of the solid. 

Chemical Reaction (The Pairs Theory*) – This involves the permanent bonding of the odourous molecule (VOC) and the PowAir active ingredients reactive sites. The mechanism transforms the pollutant in its basic properties. As a result, odour disappears. 

* The Pairs Theory is based on the work of Zwaardermaker, an early 20th century Dutch scientist. The Zwaardermaker Pairs Theory concludes that two or more odours can cancel each other out when they combine in natural bond like attraction. 

the Science of PowAir


The affinity of the different odourous compounds (VOC’s) with PowAir is directly relative to their chemical composition and physical state. For example, a hydrogen sulphite can have a great affinity for certain sites of the PowAir active ingredient. It can bond either electrostatically, or react in comparison to its relative solubility. This means different components will be neutralised by one mechanism compared to the other two, or a blend of each of the three. 

The bottom line is PowAir is not a masking agent but offers a safe effective way to permanently eliminate odours and emissions.