Oxygen supply for oxyfuel CO2 capture |
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| Authors: | Paul Higginbotham Vince White Kevin Fogash Galip Guvelioglu |
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| Institution: | 1. Air Products PLC, Hersham Place Technology Park, Molesey Road, Walton-on-Thames, Surrey KT12 4RZ, UK;2. Air Products & Chemicals, Inc, 7201 Hamilton Blvd, Allentown, PA 18195, USA;1. Research Centre for Energy Resources and Consumption (CIRCE),CIRCE Building-Campus Río Ebro, Mariano Esquillor Gómez, 15, 50018, Zaragoza, Spain;2. Escuela de Ingeniería y Arquitectura, Universidad de Zaragoza, Campus Río Ebro, María de Luna 3, 50018, Zaragoza, Spain;3. Amec Foster Wheeler Energia Oy, Relanderinkatu 2, 78201 Varkaus, Finland;1. Department of Chemical Engineering, Monash University, Clayton, Vic 3800, Australia;2. Shanghai Boiler Works Co Ltd, Minhang, Shanghai 200245, China;1. Air Liquide, 57 Avenue Carnot, BP 313, 94503 Champigny sur Marne Cedex, France;2. Air Liquide, 1 Chemin de la Porte des Loges, 78350 Les Loges en Josas, France |
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| Abstract: | This paper presents the results of a study to develop Air Products’ air separation unit (ASU) offerings for oxyfuel coal CO2 capture projects. A scalable “reference plant” concept is described to match particular sizes of power generation equipment, taking into account factors such as safety, reliability, operating flexibility, efficiency, and low capital cost. We describe the selection of a process cycle to exploit the low purity requirements, as well as the options for compression machinery and drivers as the scale of the plant increases and the sizes of referenced equipment limit the possibilities. We also explore integration with other elements of the system, such as preheating condensate or heating and expanding pressurised nitrogen. In addition, we consider how the ASU affects the flexibility of the oxyfuel system and discuss how its power consumption can be reduced during periods of high power demand. Finally, the advantages and disadvantages of different execution strategies for air separation unit projects are discussed, as well as alternative commercial models for the supply of oxygen. |
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