By C. Hendriks

ISBN-10: 9401041334

ISBN-13: 9789401041331

ISBN-10: 9401103011

ISBN-13: 9789401103015

1. 1. Greenhouse gasoline emissions and weather swap . . . . . . . . . . . . . . three 1. 1. 1. Emissions and concentrations of greenhouse gases three 1. 1. 2. impression of accelerating greenhouse gases focus four 1. 2. thoughts to lessen carbon dioxide emissions five 1. 2. 1. Carbon dioxide removing eight 1. three. Scope of the thesis 10 1. four. define of the thesis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . eleven 1. four. 1. normal overview technique. . . . . . . . . . . . . . . . . . . . . . . 12 1. four. 2. a few notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . thirteen II. Simulation and optimization of carbon dioxide restoration from the flue gases of a coal-fired strength plant utilizing amines 14 summary 19 2. 1. advent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2. 2. The chemical absorption technique. . . . . . . . . . . . . . . . . . . . . . . . 22 2. 2. 1. basic strategy description. . . . . . . . . . . . . . . . . . . . . . . 22 2. 2. 2. kinds of absorbent 23 2. 2. three. results of flue fuel contaminants 24 2. three. Simulation of the scrubber in ASPEN PLUS . . . . . . . . . . . . . . . . . 25 2. three. 1. ASPEN PLUS for circulation sheet simulation 26 2. three. 2. Simulation of the functionality for the base-case layout . . 26 the scrubber . . . . . . . . . . . . . . . . . . . . . . 29 2. three. three. Optimization of two. three. four. layout and effects 32 2. three. five. dialogue. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 2. four. Integration of the scrubber within the energy plant 35 2. four. 1. strength loss as a result of steam extraction 36 2. four. 2. energy stored via fending off preheating boiler feed water . . . 38 2. four. three. energy intake via the carbon dioxide scrubber . . . . . 38 2. four. four. strength intake for carbon dioxide compression . . . . . 38 2. four. five. Calculation of plant potency losses " . . . . . . . . . . . . . . 39 2. 5.

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40 MWth , compared to the reboiler duty in base-case design. The influence of the degree of regeneration is shown in figure 5. In the case of MEA the regeneration percentage must be decreased with respect to the basecase design to reduce the reboiler duty. The consequence is an increasing circulation flow. For DEA the degree of regeneration can be much higher. Although the influence on the reboiler duty is not large, the reduction in the solvent flow is significant. 700 650 MEA :;:~ a...... 600 6 ~ ::l '0 ...

Changer cooler CI regeneralor rich-hoI nue gases lean-hoI pump Figure 1. Flow sheet for the recovery of CO 2 from flue gases using a chemical absorption unit. 2. Types of absorbent Absorbents can be classified according to their reactivity to CO 2 , Commonly used absorbents are alkanolamines. They are applied as solutions in water. , 1984]. The classification is based on the substitution of the hydrogen on the nitrogen atom. Primary amines are for instance monoethanolamine (MEA) and 23 Chapter II diglycolamine (DGA).

1993] report the development of a new absorber packing, with a lower pressure drop over the absorber. As a result the power demand for compression can be reduced by more than 50% compared to conventional packing. Improvements may also be obtained if a gas absorption membrane is used as an absorber [Feron, 1992]. Feron estimates that such a system has lower equipment costs and lower energy requirements than a conventional absorber. 7. Conclusions In this study a chemical absorption unit for the recovery of CO 2 from flue gases of a conventional coal-fired power plant is simulated in ASPEN PLUS.

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Carbon Dioxide Removal from Coal-Fired Power Plants by C. Hendriks


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