Airprotekt Ltd.


AirProtekt’s focus is on providing tailored Air Pollution Control solutions by using key technologies to deliver guaranteed emissions. Established in 1994, AirProtekt was created from the former Environmental Products business of Johnson Matthey plc. Honeycat Catalytic oxidation systems worldwide, Airprotekt's PMC catalysts have been installed in thousands of catalytic oxidation systems.

The Platinum Group Metal catalysts, which form the heart of a Honeycat catalytic oxidation system, are derived from well-proven autocatalyst technology and offer numerous benefits compared with rival catalytic systems.

Flowrates that can be treated in a single catalytic oxidiser range from 10m3/hr to 60,000m3/hr;
Catalyst modules for installation into existing process exhausts, utilising only the process temperature and pressure (eg ovens, kilns and out-of-compliance thermal oxidisers);

Selective Catalytic Reduction (SCR)

AirProtekt supplies either the complete Selective Catalytic Reduction (SCR) package or the SCR catalyst for control of NOx emissions.

The catalyst technologies are all well proven and supported by the highest manufacturing and quality control standards from one of the leading catalyst manufacturers in the world.

The AirProtekt nitrogen oxide (NOx) removal process is a Selective Catalytic Reduction (SCR) technique that uses urea as the reducing agent.

The basic reactions break down the nitrogen oxides into harmless nitrogen and water. Ordinarily, the reactions require a long period of time to complete, so a suitable catalyst must be used to accelerate these reactions. The AirProtekt catalyst fulfils these requirements.

Urea is used as a reducing agent because it is generally unaffected by the oxygen present in the exhaust gases and is readily available.

In most exhaust gases, almost all of the NOx present is in the form of nitrogen oxide (NO). The optimum temperature for the reduction of the NOx using a zeolite/ base-metal catalyst is about 350-550°C

Selective Catalytic Reduction (SCR)

Stationary engines catalysts

We offer three options for air pollution control equipment to deal with PM Particulate Matter, Hydrocarbon & CO on primed or stand by diesel generator. The differences between the options are the increased performances for PM reduction versus higher back pressure.

1 Oxidation Catalyst is a low back pressure option which is primarily to deal with Carbon Monoxide, hydrocarbons & diesel odour, in conjunction with ultra low sulphur City Diesel it will reduce particulate levels by 15%.

2 Catalysed Flow Through Filter is a medium range pressure drop system which deals with above and in addition will reduce particulate levels by 50% (including PM10s)

3 Catalysed Wall Flow Filter is a high range pressure drop system which deals with above and in addition will reduce particulate levels by 90% (including PM10s), including all start up soot.

4 SCR Selective Catalytic Reduction which reduces NOx only

Stationary engines catalysts

Air Pollution Control

AirProtekt is an Air Pollution Control specialist that has built up a wealth of market knowledge, technical expertise and practical skills gained from working for more than thirty years in the global Air Pollution Control industry.

We offer our international client base an in-depth, one-to-one technical service. We are experts at providing custom systems to detailed specifications.

Air Pollution Control

Honeycat Concentrator System

The Honeycat ® Concentrator System is an optimium abatement plant suited to low solvent concentration and low particulate manufacturing processes. It has major advantages in low capital investment, low running costs, ease to fit into a customer’s existing process without any optimisation and lends it self to start & stop campaigns as it can be up to operating temeperatures very quickly.

To summarise the exhaust gases from a low VOC process are ducted and pulled through a rotary honeycomb zeolite wheel. The solvent from the process stream are adsorbed onto the hydrophobic zeolite in the honeycomb. The rotor turns continuously transporting the VOC into the regeneration zone. There the VOCs are removed by a small preheated stream. The regenerated zeolite then is rotated back into the process air for further adsorption of VOCs from the process

The air from the regeneration zone of the zeolite wheel is de adsorped ducted through a second fan into The Honeycat ® Catalytic Oxidation System. Here the process exhaust gases then pass through a oxidation catalyst where the VOCs are oxidised to Carbon Dioxide CO2 and water vapour.

From the exit of the catalyst the heat from gases are recovered in the primary air-to-air heat exchanger thus cooling the exit gases before joining the clean main process stream and exiting to stack. During start up and shutdown the system will automatically operate on fresh air.

Honeycat Concentrator System

Regenerative thermal oxidation systems (RTO)

A wide range of industrial processes generates Volatile Organic Compounds (VOCs) as a consequence of using organic compounds as solvents or reactive chemicals.

In addition to causing localised odour problems VOCs are implicated in a wide range of environmentally damaging processes, including the generation of low-level ozone and smog. For this reason legislation has been introduced in many countries setting very low emission limits for VOCs in process exhaust gases.

Air Protekt supplies very efficient Regenerative Thermal Oxidation systems (RTO) that use a technology solution, which has been proven over a number of years to be suitable for the destruction of high levels of VOCs. The RTO system also combines very high thermal efficiencies and while minimising operating costs.

Regenerative thermal oxidation systems (RTO)

Process Heat Recovery

With the increased energy costs we provide energy efficiency solutions to significantly reduce heat energy consumption on an industrial process. Existing VOC abatement equipment (eg thermal & catalytic oxidiser) can benefit from secondary heat recovery system incorporated into the tail exhaust prior to exiting to chimney stack. This energy in the form of heat can be reused within other process plant or for space heating etc.

We offer turn key solution including highlighting existing process energy loss, design recommendations right through to mechanical & electrical installation and if necessary re-commissioning of existing process equipment (eg RTO/dryers) to ensure the manufacturing process remains unchanged    

Process Heat Recovery
Can we help?