Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.1890
Publisher DOI: 10.1016/j.egypro.2016.01.001
Title: Comparison of natural gas combined cycle power plants with post combustion and oxyfuel technology at different CO₂ capture rates
Language: English
Authors: Mletzko, Jan 
Ehlers, Sören 
Kather, Alfons 
Keywords: NGCC;post-combustion capture;oxyfuel;capture rate
Issue Date: 1-Jan-2016
Publisher: Elsevier
Source: Energy Procedia (86): 2-11 (2016-01-01)
Journal or Series Name: Energy procedia 
Abstract (english): Within this work a natural gas-fired combined cycle plant is investigated with post-combustion CO₂ capture (PCC) and as a semi-closed oxyfuel combustion combined cycle (SCOC-CC) using process simulation tools. In most studies the CO₂ capture rate of PCC units is set to 90% while the SCOC-CC is often considered for zero emission plants. To allow a comparison between the processes the capture rate needs to be taken into account. If a certain CO₂ emission value is required a different capture rate may be economically attractive. The effect of the capture rate is investigated from 60% to 97.5% for PCC and from 75% to 100% for the SCOC-CC. For PCC the capture rate has a strong influence on the efficiency penalty. For a broad range of capture rates the specific heat duty is found to be approx. constant. However, for very high capture rates the heat duty strongly increases. The efficiency penalty of the SCOC-CC is much less affected by the chosen capture rate, because the duty of the air separation unit (ASU) is independent on the capture rate. However to achieve a sufficient CO₂ purity a reduced capture rate can be necessary. The processes are compared regarding the loss of electrical energy per kg CO2 captured. PCC has a significantly lower specific loss for low capture rates of approx. 0.38 kWhel/kg CO₂ compared to the SCOC-CC with more than 0.48 kWhel/kg CO₂. For capture rates of > 90% the losses of both processes approach each other. With high purity oxygen the SCOC-CC can achieve a capture rate of 100% as well as a CO₂ purity of >96 vol.-% at a specific loss of 0.49 kWhel/kg CO₂.
Conference: The 8th Trondheim Conference on CO2 Capture 
URI: http://tubdok.tub.tuhh.de/handle/11420/1893
DOI: 10.15480/882.1890
ISSN: 1876-6102
Institute: Energietechnik M-5 
Type: (wissenschaftlicher) Artikel
Appears in Collections:Publications with fulltext

Files in This Item:
File Description SizeFormat
1-s2.0-S1876610216000035-main.pdf380,82 kBAdobe PDFThumbnail
View/Open
Show full item record

Page view(s)

244
Last Week
5
Last month
19
checked on Jul 7, 2020

Download(s)

145
checked on Jul 7, 2020

Google ScholarTM

Check

Note about this record

Export

This item is licensed under a Creative Commons License Creative Commons