Overview
FrançaisABSTRACT
Nitrogen is interesting as an inert gas and as a cooling and freezing liquid. It facilitates a variety of commercial and technical applications, improves yields, optimizes performances, ensures product quality and safe production processes. However, selecting the right supply mode of nitrogen is not always simple. The non-cryogenically production of nitrogen by a PSA (Pressure Swing Adsorption) system may, in many applications, offer significant advantages. Demand for nitrogen flow is another important factor to be considered. Where the nitrogen purity and flow profile allow for the selection of a PSA system, this solution of on-site nitrogen production is able to reduce investment and operation costs.
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Read the articleAUTHORS
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Svetlana IVANOVA: Air Products Merchant Gases Division
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Robert LEWIS: Air Products Merchant Gas Division
INTRODUCTION
Nitrogen gas is a basic product for the chemical industry. As an inert gas, it can be used in a wide range of applications covering various aspects of chemical production, processes, handling and shipping. As it does not react with most materials, it is, for example, an excellent blanketing and purging gas used to protect valuable products from harmful contaminants. It also enables flammable products to be stored and used safely, and protects against combustible dust explosions. It can also be used to remove in-process contaminants by pickling or bubbling.
The increasingly widespread use of nitrogen in the chemical industry has prompted industrial gas companies to constantly improve their production and supply methods, in order to make them more efficient, cost-effective and convenient for their customers. As a result, there are now a variety of techniques and supply methods available to meet a wide range of requirements, whether in terms of purity, type of use, portability, footprint or local cost of electricity. Choosing between all the solutions on offer can therefore be difficult. Nitrogen generators, such as PSA (pressure swing adsorption) or AMP (pressure swing adsorption) membrane units, are a cost-effective option for a wide spectrum of flows and purities.
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KEYWORDS
nitrogen | | gas
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Unit operations. Chemical reaction engineering
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PSA process for on-site nitrogen production
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