Details

Autor(en) / Beteiligte

• Chisalita, Dora-Andreea
• Petrescu, Letitia
• Cormos, Ana-Maria
• Cormos, Calin-Cristian

Titel

Assessing Energy and CO2 Emission Reduction from Ammonia Production by Chemical Looping as Innovative Carbon Capture Technology

Ist Teil von

• Computer Aided Chemical Engineering, 2018, Vol.43, p.1269-1274

Erscheinungsjahr

2018

Link zum Volltext

Beschreibungen/Notizen

• The paper evaluates the technical performances of an ammonia production plant having an output of 2500 t/day. Mass and energy integration aspects of natural gas conversion (conventional steam reforming, autothermal reforming and chemical looping), carbon capture unit by gas-liquid and gas-solid systems, ammonia production and associated heat recovery and their influence on the overall ammonia production performances are discussed in detail. The ammonia production concepts were modelled and simulated using a process flow modelling software (ChemCAD). The obtained simulation results were used to assess the overall technical and environmental indicators of the ammonia production plant. Three case scenarios with CO2 capture were considered for investigation. Industrial and experimental data were used to validate the models. The results show that the chemical looping system has significant advantages compared to the natural gas reforming technologies coupled with the gas-liquid absorption technology such as: lower specific fossil energy consumption (8.3 MWth/t NH3 vs. 9.6 - 9.9 MWth/t NH3), higher carbon capture rate (99.9 % vs. 60 – 90 %), lower specific CO2 emissions (7 kg/t NH3 vs. 230 - 900 kg/t NH3 for plants with CO2 capture based on gas-liquid absorption and about 2000 kg/t NH3 for plant without CO2 capture), lower plant complexity. The presented technical analysis of the different ammonia production cases shows very promising options to significantly reduce the fossil energy consumption as well as the carbon footprint of this important industrial sector.