Green Cement Calculator
Calculate cement production or hydrogen demand for green cement kilns, including electrolyser requirements.
How to Use This Calculator
Example Calculation
- Cement Production: 25,000.0 kg/d
- Hydrogen Demand: 1,000 kg/d
- Electrolyser Power: 2.47 MW
- Energy Required: 56.2 MWh/day
- Water Required: 9.00 m³/day
Technical Considerations
- The calculator assumes 40 kg H₂ is required per tonne of cement (full fuel switch, typical value).
- Does not include additional energy for raw material processing or other plant steps.
- Water demand is based on electrolysis only (9 L per kg H₂).
- Electrolyser power and energy are calculated using 39.44 kWh/kg H₂.
- Real-world values may vary depending on kiln type, process, and plant efficiency.
Background & Sources
The value of 40 kg H₂ per tonne of cement is based on published studies and pilot projects examining the use of hydrogen as a fuel to replace fossil fuels in cement kilns. Cement kilns require high temperatures (typically 1400–1500°C) for clinker production, traditionally provided by burning coal, petcoke, or natural gas. Green cement concepts propose using hydrogen as a clean-burning fuel to provide this heat, eliminating direct CO₂ emissions from fuel combustion (though not from limestone calcination).
Literature and industry reports suggest a range of 30–50 kg H₂ per tonne of cement for full fuel replacement, depending on kiln efficiency and process specifics. The calculator uses 40 kg/t as a typical, conservative value.
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