Get Premium Attur Layout Call Girls (8005736733) 24x7 Rate 15999 with A/c Roo...
Modelling the cement industry - Energy flows connected to material flows and production processes
1. WIR SCHAFFEN WISSEN – HEUTE FÜR MORGEN
Modeling the cement industry - Energy flows
connected to material flows and production processes
Michel Dominik Obrist :: PhD Student :: Paul Scherrer Institute
ETSAP-Workshop :: 17.12.2020
2. Presenter’s Profile
Page 2
Michel Dominik Obrist
Born 05.04.1989
PhD Student at Paul Scherrer Institute (PSI) in Villigen (CH)
Laboratory for Energy System Analysis (LEA)
Energy Economics Group
Contact: michel.obrist@psi.ch
+41 56 310 26 91
Education:
Sep 09 – Sep 12: BSc in Mechanical Engineering
University of Applied Sciences, Windisch (CH)
Sep 16 – Sep 18: MSc in Sustainable Energy
Technical University of Denmark, Lyngby (DK)
3. • TIMES based demand model of cement industry subsector
• Scope:
− Cement sector in Switzerland
− Analysis until 2050
• Exogenous inputs:
− Prices of the energy carrier from national energy system model (STEM)
− Cement demand
− Scenario analysis with energy efficiency target, CO2 tax and CO2 cap
• Plan is to connect the subsector model to the national energy system model
General description of the model
Page 3
4. • Previous modelling technique
Methodology – Modeling technique
Page 4
Space heat
Process heat
Mechanical drives
Lighting
Others
Model
Electricity
Coal
Natural gas
Oil
Waste
Biomass
Hydrogen
Wood pellets
Energy carrier
Energy service
demand
5. • Previous modelling technique
Methodology – Modeling technique
Page 5
Space heat
Process heat
Mechanical drives
Lighting
Others
Electricity
Coal
Natural gas
Oil
Waste
Biomass
Hydrogen
Wood pellets
Energy carrier
Energy service
demand
8. With the new modeling technique, the model can account for:
• Specific energy efficiency improvements of single process steps
− Mills with higher energy efficiency
− Kilns with better insulation
• Process related improvements
− Waste heat recovery
• Material efficiency enhancement
− Clinker ratio in cement
− Reuse of demolished concrete as supplementary cementitious material
• Process related emissions
− CO2 emissions from chemical conversion of limestone into clinker
Advantages
Page 8
11. • Absorbtion with monoethanolamine (MEA)
− CO2 is absorbed by aqueous menoethanolamine solvent
− Requires considerable amount of heat for solvent regeneration
• Chilled ammonia process
− CO2 is adsorbed by chilled ammonia as solvent
− Heat is required for solvent regeneration and ammonia recovery
• Calcium Looping – Tail end
− Based on the carbonation reaction CaO + CO2 CaCO3
− Implementation of steam cycle using waste heat is possible
• Oxyfuel process
− Combustion is performed with oxygen and CO2
− Process needs to be modified
− Possibility to implement ORC because of the hot exhaust air
CCS technologies
Page 11
12. Result highlights - CCS technologies
Page 12
[1] Obrist M. et al. (2020)
• CAP-80 scenario targets a linear reduction of the CO2 emissions by 80% until
2050 compared to 2015
13. • CAP-80 scenario targets a linear reduction of the CO2 emissions by 80% until
2050 compared to 2015
Result highlights – Kiln technologies
Page 13
[1] Obrist M. et al. (2020)
15. • Detailed model of the Swiss cement sector with material flows and production
processes connected to conventional energy flows
• With the model we were able to show:
− Energy consumption decreases (3.0 GJ/tcement in 2015 to 2.3 GJ/tcement in 2050)
− CO2 emissions decrease (579 kgCO2/tcement in 2015 to 466 kgCO2/tcement in 2050)
− Drastic reduction of the CO2 emissions requires CCS technologies and a
minimum tax of 70 EUR/tCO2
Summary and conclusion
Page 15
The full scenario analysis with all results is
available in our publication:
Obrist M., Kannan R., Schmidt T.J., Kober T.
2020. Decarbonization pathways of the Swiss
cement industry towards net zero emissions.
Journal of Cleaner Production, DOI:
10.1016/j.jclepro.2020.125413
16. Page 16
Wir schaffen Wissen – heute für morgen
My thanks go to my
supervisors
• Dr. Tom Kober
• Dr. Kannan
Ramachandran
• Prof. Dr. Thomas
Schmidt
Contact:
michel.obrist@psi.ch
+41 56 310 26 91