Linde Gas - Speciality gases for stack-emissions monitoring

The quality of your gas is only ever as high as the quality of your gas supply system. With its range of HiQ speciality equipment, Linde Gas offers a convenient and reliable package for gas detection, calibration and handling, ensuring integrity throughout the process.

International accords, such as the Montreal or Kyoto Protocols, call on industries everywhere to monitor, control and reduce their emissions before discharging them into the environment. There are a number of different particulates and gaseous compounds found in smokestack emissions from power-generation industries. Legislation requires power-generation facilities to monitor for an increasingly wide number of compounds at lower and lower levels.

HiQ environmental calibration gas-mixtures and instrument gases are used to zero and calibrate a variety of gas chromatography detectors, such as flame ionisation detectors, photo ionisation detectors, and electron capture detectors, along with gas-specific sensors for low levels of acid rain and greenhouse gas emissions.

These calibration gas mixtures can be used for ambient air monitoring in locations remote from the emissions, or continuous emission monitoring at the smokestack where the emissions originate. The portable ECOCYL cylinder can be the complete and convenient package for gas detection and remote calibration. To measure contaminants such as nitric oxide, nitrogen dioxide, carbonyl sulphide, hydrogen sulphide, carbon monoxide and sulphur dioxide, SPECTRA-SEAL calibration mixtures offer stability during the use of the mixtures in a wide variety of calibration standards -- down to parts-per-billion levels.

ISO-accredited calibration standards are also used to ensure accuracy and traceability via emission trading scheme verification and traceable reports. To reduce the emissions of contaminants such as nitric oxide, selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) technologies can be used. SCR uses the acid of a catalyst to convert nitric oxides into diatomic nitrogen and water; SNCR uses either ammonia or urea as the reductant in the chemical redox reaction with the nitric oxide, resulting in diatomic nitrogen, carbon dioxide and water.

Speciality equipment for special applications

Complex industrial processes and instruments demand products of the highest quality to maintain peak performance. Distribution systems for speciality gases must increasingly meet demands for optimal standards of performance, new analysing methods and production refinements. Impurities occurring in just a few parts-per-million can have serious consequences for the end user. The demands made on regulators and valves in these environments are extremely high. Highly durable, high-standard HiQ speciality equipment and equipment installations are therefore essential for the reliable supply of these calibration gas mixtures.

Gas-handling equipment functionality is critical and must be suited to the sophisticated gas being handled. This encompasses factors such as pressure reducing regulators and purge functionalities. Construction materials are once again critical to the integrity of the distribution system, particularly where speciality gases contain corrosive components. Joints, seals, moving parts and fittings in regulators and valves must be tight and impermeable -- much more so than in equipment used to supply industrial and medical gases.

In these applications, the term 'helium leak tightness' is often used to determine leak potential, referring to how much helium will leak from the systems within one second under certain circumstances. Typically, with industrial and medical equipment, 1cm3 of helium could leak from a component within an hour. On the other end of the scale, other gas distribution systems might display far better leak rates, capable of maintaining their integrity up to, and even well beyond, 30 years for the loss of 1cm3.

HiQ speciality equipment is designed to maintain the integrity of your speciality gases between the cylinder and the instrument or process.

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Highly durable, highly effective: the HiQ speciality equipment REDLINE cylinder regulator.
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