- Additive Manufacturing Processes
- Analysis & Instrumentation
- Cleaning, Polishing & Grinding
- Clinical Analysis & Diagnostics
- Coating & Surface Treatment
- Controlled & Modified Atmospheres
- Cutting, Joining and Heating
- Freezing & Cooling
- Fumigation & Pest Control
- Heat Treatment
- Inerting, purging, sparging
- Leisure & Hospitality
- Melting & Heating
- Petrochemical Processing & Refining
- Pharmaceutical Processing
- Plastics & Rubber Processing
- Process Chemistry
- Water and Wastewater Treatment
Various refining processes produce hazardous substances such as volatile organic compounds (VOCs), particulate matter, sulfur dioxide and nitrogen oxides. These compounds represent a serious health and environmental hazard and their release is regulated by increasingly strict regulations. We have developed a number of leading-edge, gas-enabled technologies to help operators capture and – in some cases – recover these emissions.
For instance, cryogenic condensation is an effective way to abate VOC emissions. Here the cooling energy can be supplied in the form of liquid nitrogen, which efficiently condenses VOCs from the waste gas stream. These can then be easily captured and re-routed back into the process or further treated. Now in gaseous form, the nitrogen can be used for other applications such as inerting. Many refinery operators already rely on our CIRRUS® product line, which builds on our long-standing cryocondensation expertise for VOC abatement and production safety.
The removal of nitrogen oxides (NOx) is another key area where refineries can benefit from our expertise. Our LoTOx™ NOx removal unit is an effective way to control particulates, sulfur dioxide and NOx emissions from fluid catalytic crackers. It is based on a low-temperature oxidation process, which employs ozone to oxidise nitrogen oxides (mainly NO and NO2) to higher oxides of nitrogen such as N2O5. These oxides are not only very soluble but also reactive, so they can be easily removed along with other hazardous pollutants using conventional wet or dry scrubbers. Because the oxidation process is not affected by other contaminants such as acid gases and particulates, it offers very robust performance even with dirty and challenging gas streams.
Wastewater emissions can be treated effectively with our process technologies that rely on industrial gases such as carbon dioxide, oxygen and ozone. These are used for pH control and aerobic biodegradation of polluting components.
In addition, we deliver high-purity gases and gas mixtures under our HiQ®range of specialty gases and equipment to operate and calibrate the special analytical instruments used to measure and monitor VOC and NOx emissions from refineries.