Cristian Dinca

Life Cycle Assessment of Circulating Fluidized Bed Combustion with CO2 Post-Combustion Capture

The objective of the paper was to determine the overall impact on the environment of CO2 capture process integration in a power plant with subcritical parameters using the technology of the circulating fluid bed combustion (CFBC).The comparative analysis of CFBC technology with and without post-combustion CO2 capture was based on the life cycle analysis methodology, highlighted the value of the indicator Global Warming Potential (GWP) but also others impact indicators such as ADP, POCP, PH, AP, and EP. Also, the integration of CO2 capture technology in the CFBC power plant was evaluated by economic and techniques indicators, laying out the effect on the initial investment but also on fixed and variable maintenance costs.

Intelligent system concept for high-energy performance and adaptable user comfort

Energy management is an essential economic factor in every country. The times when Europe had safe and cheap energetic resources are now gone. These days, all of European’s Union members are confronting with high challenges brought by climate changes, dependency of massive imports of energy and higher energy prices. On an international scale, the energetic efficiency of the buildings is possible through intelligent management of energy consumption. Present article will reveal a concept for an intelligent management system for energy consumption and adjustable user comfort.

High Performance of the CFBC Pilot Plant with CO2 Chemical Absorption by Optimizing the Absorber Parameters

The objective of this paper consists to identify the influence of absorption process temperature and pressure on the energy requirement of the CO2 chemical capture process. The study aimed to reducing CO2 emissions from coal combustion process in the circulating fluidized bed combustion (CFBC). The post-combustion CO2 capture process was analyzed using primary amine MEA in the following conditions: the ratio L/G was varied between 0.45..1.6 kgliquid/kggas keeping constant the flue gas flow and varying the solvent flow between 500 .. 1 600 kg/h. The CO2 capture process efficiency was maintained constant around 90%. For a concentration of 30% MEA in solution, it was observed that when the absorber solution temperature increasing from 32 to 49 °C, the amount of heat required for the solvent regeneration increased from 2.1 to 3.3 GJ/tCO2 according to the solvent pressure and flue gas pressure respectively. On the other hand, for varying the absorber solvent pressure in the range 1.1 .. 2.1 atm, the heat required by the process was not significantly influenced. Considering the same variation of the absorber solvent temperature, the rich loading solvent was increased from 0.43 to 0.57 mol CO2/mol MEA and consequently the MEA capacity of CO2 absorption from 0.3 to 0.422 molCO2/mol MEA.