Department of Chemical Engineering, RV College of Engineering, Bengaluru, 560059, India.
Environ Sci Pollut Res Int. 2022 Aug;29(36):54967-54987. doi: 10.1007/s11356-022-19748-0. Epub 2022 Mar 21.
Operation of power plants with carbon dioxide capture and sequestration (CCS) and without carbon dioxide capture and storage modes and energy penalty or energy utilization in such operations is of great significance. This work reports on two gas-fired pressurized chemical-looping combustion (CLC) power plant layouts with two inbuilt modes of flue gas exit, namely, one with carbon dioxide capture mode and the second mode is letting flue gas (consists of carbon dioxide and water) without capturing carbon dioxide. Without CCS mode, the higher thermal efficiencies of 54.06 and 52.63% are obtained for natural gas and syngas, respectively. In carbon capture mode, a net thermal efficiency of 52.13% is obtained with natural gas and 48.78% with syngas. The operating pressure of the air reactor is taken to be 13 bar for realistic operational considerations, and that of the fuel reactor is 11.5 bar. Two power plant layouts were developed based on combined-cycle chemical-looping combustion (CC CLC) for natural gas and syngas fuels. A single layout is developed for two fuels with a possible retrofit for dual fuel operation. The CLC power plants can be operated with two modes of flue gas exit options, and these operational options make them higher thermal efficient power plants.
具有二氧化碳捕集和封存（CCS）功能的发电厂以及没有二氧化碳捕集和储存模式的发电厂的运行，以及这些运行中的能源损失或能源利用情况具有重要意义。本工作报告了两种基于燃气的加压化学链燃烧（CLC）发电厂的布局，它们具有两种内置的烟道气出口模式，一种是具有二氧化碳捕集模式，第二种模式是不捕集二氧化碳而让烟道气（包含二氧化碳和水）排出。在没有 CCS 模式的情况下，天然气和合成气的热效率分别达到了 54.06%和 52.63%。在碳捕集模式下，天然气的净热效率为 52.13%，合成气的净热效率为 48.78%。出于实际运行考虑，空气反应器的操作压力设定为 13 巴，燃料反应器的操作压力设定为 11.5 巴。基于天然气和合成气燃料的联合循环化学链燃烧（CC CLC）开发了两种发电厂布局。为了可能的双燃料运行，为两种燃料开发了一个单一的布局。CLC 发电厂可以在两种烟道气出口选项的模式下运行，这些运行选项使它们成为更高效的热力发电厂。
