Carbon dioxide recovery from flue gas

For the recovery of CO2 from flue gas or calcinations kiln exhaust, further process steps are required as shown in Fig. 6.10, in addition to the CO2 purification and 

Compared to the recovery of CO2 from other sources, the cost of this process is so high that flue gas or similar CO2 sources cannot be regarded as economically attractive for CO2 recovery. 

However, with the increasing pohtical pressure regarding COj emissions, e.g. from power stations burning fossil fuel and chemical plants, great elForts are being made to develop new processes for the capture of COj [6.27, 6.28]. This captured CO2 may be stored in the ground (e.g. in exploited oil or gas fields (EOR) or aquifiers) or in the deep sea. For this sequestration the CO2 must be compressed to pressures up to 100 bar and more. The flow rates of such COj streams are huge compared to the CO2 flow rates in the normal gas market, e.g. a 600 coal-fired power station produces about 240 t/h COj. After the 

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Carbon dioxide Recovery from flue gas Monoethanolamine in water... 

Nelson, T.O., P.D. Box, D.A. Green, and R.P. Gupta, Carbon Dioxide Recovery from Power Plant Flue Gas using Supported Carbonate Sorbents in a Thermal Swing Process, Sixth Annual Conference on Carbon Capture and Sequestration, Pittsburgh, PA, May 2007. 

Kikkinides, E.S. Yang, R.T. Cho, S.H. (1993). Concentration and recovery of carbon dioxide from flue gas by pressure swing adsorption. Industrial Engineering Chemistry Research, 32 (11), 2714-2720. 

Figure 1. QAFAC methanol plant with an example of process integration, where CO2 from the flue gas from the reformer is captured and fed to the methanol reactor, CDR refers to Carbon Dioxide Recovery [11],...

KM CDR [Probable derivation Kansai Mitsubishi Carbon Dioxide Recovery] A process for capturing carbon dioxide from flue gas and using it for enhanced oil recovery. The carbon dioxide is captured in a proprietary hindered amine using a packed column. It is used under supercritical conditions to reduce the viscosity of crude oil and thus enhance its recovery. Developed in 2004 by Mitsubishi Heavy Industries, Kansai Electric Power Co., and Shell EP International. Now operated in India and Bahrain. 

Still, the high selectivity promised by these membranes continues to encourage research. The targets are those where other types of membrane separations have been found to be limiting. Among commodity chemicals, these include the separation of air and of olefins and alkanes. The recovery of carbon dioxide from flue gas will receive... 

The cooler part of the combustion air preheater - the tail end of the flue-gas-heat-recovery train - is more likely to corrode due to sulfur dioxide (S02) condensing from the flue gas. In this area, cast iron or glass will resist the acid attack. Carbon steel preheater tubes, joined with 1.5 to 2 meters of SS 304 tubes at the cold end of the tube sheet, can ensure reasonable service life. Typically, the flue gas temperature to the stack is maintained above the dew point of S02 to prevent condensation. During startup and shutdown, condensation of S02 will occur88. 

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