Cement Plant CO2 Calculator - Scope 1, 2 and 3

FUTURE CEMENT · CARBON TOOL

Cement Plant CO₂ Dashboard

A plant-level greenhouse-gas inventory covering cement manufacturing Scope 1, Scope 2 and all 15 Scope 3 categories, with cement-specific process, fuel, clinker, electricity and value-chain indicators.

Scope 1 gross

t CO₂e/y

Scope 2 location

t CO₂e/y

Scope 2 market

t CO₂e/y

Scope 3

t CO₂e/y

Scope 1 + 2

t CO₂e/y

Full inventory

t CO₂e/y

Annual emissions structure

Scope 1Scope 2Scope 3

Core cement KPIs

Gross CO₂e / t clinker

Scope 1 CO₂e / t cement

Scope 1+2 / t cement

Full Scope 1+2+3 / t cement

Clinker factor

Scope 1 breakdown

Scope 3 breakdown — 15 categories

Production & reporting period

Reporting year

Clinker production t clinker/year

Cement production t cement/year

Average clinker factor Calculated from production if cement/clinker are entered

Plant energy

Purchased electricity MWh/year

On-site electricity generation MWh/year; Scope 1 fuel emissions calculated separately

Purchased steam/heat/cooling GJ/year

Location-based electricity EF kg CO₂e/MWh

Market-based electricity EF kg CO₂e/MWh; enter contractual supplier/EAC factor

Purchased heat EF kg CO₂e/GJ

Stationary fuel combustion

Enter annual fuel consumption and fossil CO₂ emission factors. For mixed/alternative fuels, enter only the fossil fraction in the fossil fuel table and biomass CO₂ in the biogenic memo table.

Fuel	Consumption	Unit	EF kg CO₂e/unit	Fossil t CO₂e

Process emissions

Calcination process CO₂ kg CO₂/t clinker

Raw-material organic/non-carbonate CO₂ t CO₂/year

Other direct process GHG t CO₂e/year

Use the process factor only for process CO₂ not already captured elsewhere. Do not enter kiln fuel combustion here.

Biogenic CO₂ memo item

Biogenic CO₂ from biomass / biomass fraction t CO₂/year

Direct CO₂ from biomass combustion is shown separately as a memo item and excluded from the fossil Scope 1 total under the GHG Protocol treatment described by GCCA. citeturn1search14

Fugitive & mobile sources

Company vehicles / mobile combustion t CO₂e/year

Refrigerants / HFCs / other fugitive GHG t CO₂e/year

Wastewater / septic / other direct sources t CO₂e/year

Scope 2 — purchased energy

The dashboard reports location-based and market-based Scope 2 separately. GHG Protocol Scope 2 Guidance standardizes accounting for purchased electricity, steam, heat and cooling and requires the applicable reporting method(s). citeturn0search1turn0search35

Energy	Activity	EF location	Location t CO₂e	EF market	Market t CO₂e

Scope 3 — all 15 categories

Scope 3 is the value-chain inventory. The GHG Protocol Scope 3 Standard defines 15 categories covering upstream and downstream activities. citeturn0search2turn0search38

Category	Activity / quantity	Unit	Emission factor	Factor unit	t CO₂e/year	Data status

Illustrative factor library — editable

Do not publish an inventory using unverified factors. The default factors below are placeholders to make the calculator operational. Replace them with supplier-specific, national-grid, EAC/contractual, IPCC, DEFRA, GCCA or another approved factor source appropriate to your reporting boundary and year.

Fuel	Default EF	Unit	Editable factor	Comment

Plant energy-performance engine

Important: not every equipment KPI is a thermodynamic efficiency. Kilns, power generators, WHR and heat-recovery stages can be expressed as energy efficiency when the heat boundary is defined. Mills, crushers and fans are better assessed using specific energy, throughput and equipment efficiency. The tool therefore labels each KPI correctly instead of calling every SEC an "efficiency".

Annual plant basis

Analysis year

Clinker production t/y

Cement production t/y

Total plant electricity MWh/y

HFO-generator electricity MWh/y

WHR electricity MWh/y; measured

HFO for power generation kL/y

HFO density t/kL

HFO net CV GJ/t

Thermal system — define the boundary

Kiln fuel thermal input GJ/y

Useful kiln heat demand GJ/y

Preheater heat recovered to raw meal GJ/y

Preheater recoverable gas heat GJ/y

Cooler recoverable clinker heat GJ/y

Cooler heat recovered to secondary/tertiary air GJ/y

WHR recoverable heat entering WHR GJ/y

WHR net electrical output MWh/y

Calculated plant/stage KPIs

Power SEC

kWh/t cement

HFO generator efficiency

WHR conversion efficiency

Kiln thermal efficiency

N/A

useful heat / fuel

Preheater recovery efficiency

N/A

Cooler heat recovery

N/A

Stage efficiency definitions

Stage	KPI	Formula	Result

Equipment performance

Enter measured operating data. For grinding equipment, use SEC/throughput rather than claiming a thermodynamic efficiency.

Equipment	Throughput t/h	Power kW	SEC kWh/t
Raw mill			0
Coal / fuel mill			0
Cement mill			0
Crusher			0

Fan / pump equipment efficiency

Fan airflow m³/s actual

Fan total pressure rise Pa

Fan electrical input kW

Pump flow m³/h

Pump head m

Pump electrical input kW

Fan overall efficiency	N/A
Pump overall efficiency	N/A

Efficiency interpretation

What is still required for a full cement-plant heat balance

The current CO₂ workbook cannot by itself calculate true preheater, calciner, kiln, cooler, raw-mill or cement-mill thermodynamic efficiencies because it does not contain all required heat/material-flow measurements. The tool therefore calculates only what the available data supports and provides defined input fields for the missing measurements. Do not convert an SEC into an "efficiency" without a defined reference work or heat boundary.

Equipment/stage	Minimum additional data required	Recommended KPI
Kiln + calciner	Fuel by stream, kiln feed, clinker, exhaust gas flow/composition/temp, tertiary air, cooler return air, radiation/convection losses	GJ/t clinker, heat balance closure, thermal efficiency, exhaust loss
Preheater	Gas inlet/outlet flow, temperatures, raw meal flow/temp, gas composition, false air	Heat recovery efficiency, gas loss, pressure drop, false-air rate
Cooler	Clinker flow/temp, secondary/tertiary air flow/temp, cooler exhaust, cooling-air distribution	Heat recovery efficiency, clinker outlet loss, air-to-clinker ratio
Raw mill	Feed, product, reject, moisture, gas flow/temp, mill DP, fan power, mill power	kWh/t, drying efficiency, fan efficiency, pressure drop, tph
Cement mill / roller press	Feed, product, reject, Blaine, residue, circulating load, power, separator speed/air	kWh/t, kWh/(Blaine·t), tph, separator efficiency, fan efficiency
WHR	Gas flow, gas inlet/outlet temperatures, boiler heat transfer, steam/ORC data, gross/net generation	GJ heat recovered/t clinker, % conversion, kWh/t clinker, net efficiency

Core equations

Fuel CO₂e = fuel activity × emission factor

Process CO₂ = clinker production × process CO₂ factor

Scope 2 = purchased energy × applicable electricity/heat EF

Scope 3 category = activity data × category-specific EF

CO₂e intensity = annual CO₂e / production

Cement-specific accounting logic

Calcination is a direct process emission and is separated from fuel combustion.
Fossil CO₂ from fossil alternative fuels is included in gross Scope 1; biomass combustion CO₂ is shown separately as a memo item. citeturn1search14
Scope 2 is shown by location-based and market-based methods rather than merging them.
Scope 3 is kept separate from Scope 1+2 so management can identify value-chain hotspots.
Do not add avoided emissions, carbon credits, offsets or avoided emissions, carbon credits, offsets or removals into the gross inventory.

Reporting controls

This dashboard is an accounting and management tool, not a verification opinion. Boundary, consolidation approach, activity data, emission factors, GWP values, biogenic treatment, market instruments and Scope 3 relevance must be documented for the reporting year.

GHG Protocol currently has an update process underway for its corporate suite. GCCA is also transitioning its Cement CO₂ and Energy Protocol to V4.2 in 2026. Therefore this tool deliberately keeps factors and methodological choices editable instead of hard-coding future requirements. citeturn0search12turn1search0