• H₂-Generation
• CO-Plants
• Gas Sweetening
• Incinerators & Thermal Oxidisers
• Acid Recovery

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The Calcor standard process is a reforming process combined with a CO₂ recovery and a CO purification step. The feed is mixed with a split stream of hydrogen, then preheated prior to passing a catalytic hydrogenation and adsorptive sulphur removal. The feed is then mixed with CO₂. Whilst passing the catalyst in the reformer tubes, the mixture of CO₂ and feed is converted into a syngas consisting of carbon monoxide together with H₂, CO₂ and CH₄. The heat for this endothermic reaction is generated by a high velocity burner firing into the reformer with circular arranged reformer tubes. The heat is transferred by radiation and convection. After leaving the reformertubes, the syngas is cooled to ambient temperature prior to undergoing the CO₂ removal and recovery. In this process step the CO₂ from the reformer flue gas as well as the CO₂ from the raw gas is absorbed in packed towers at ambient temperature by caustic solution (MEA). In a stripper, the CO₂ is separated from the scrubbing liquid and recycled via a preheater to the reforming process. The reboiler is heated by steam generated in the waste heat boiler fired by the hot flue gas from the reformer. The syngas which typically consists of 70 % by vol. CO and 30 % by vol. H₂ and still carries traces of CO₂ and CH₄ enters the CO purification step. The tail gas separated in the CO purification step is either totally returned to the reformer as fuel, or H₂ is extracted from and exported as technical grade hydrogen.

The selective properties of membranes make it possible to simultaneously separate H₂ and CO₂ from the CO product, which results in a simplified design of the Calcor process. In this "economy" version of the Calcor process, the CO₂ recovery part of the process is deleted and imported CO₂ is used instead of recovered CO₂. This version is preferably used at locations, where low cost CO₂ is available or CO₂ can be imported economically. Since the major part of the production costs are capital costs, depreciation and interest rather than utility and energy costs, the economy process offers an additional advantage for the production of small quantities of CO.