CEMENT H2
CEMENT H2Our NiCo Electrode for Cement Decarbonization
Cement kilns are exploring hydrogen as a partial fuel-switching option to reduce CO2. Our bifunctional NiCo electrode supplies the hydrogen at 91.4% energy efficiency at 0.5 A/cm2 in an AEM cell with a commercial Zirfon separator.
Polarization (RT vs 60 °C)
TESTBEDProduction at industrial current density
Bifunctional NiCo + commercial Zirfon: 0.5 A/cm2 at 1.62 V at 60 deg C (91.4%). Cement kiln hydrogen demand scales with kiln throughput.
Continuous production matches kiln uptime
1000 hours at 0.5 A/cm2 / 40 deg C with bifunctional NiCo + commercial Zirfon: 21 uV/hr drift.
Bifunctional
80 mV / 260 mV at 100 mA/cm2 (no IR correction).
Scales to plant-level capacity
Ni foam from 100 to 1000 cm2 for pilot through industrial scale.
Hydrogen partial fuel switching for cement
Cement-kiln decarbonization is multi-faceted: clinker substitution, carbon capture, fuel switching. Partial hydrogen substitution in the kiln burner reduces CO2 from fuel combustion (but not the process emissions from calcination). The hydrogen supply for cement kilns needs to be steady and at scale.
Our bifunctional NiCo electrode on Ni foam (100 to 1000 cm2), electroless-deposited, contributes the electrolyzer side. The same coated electrode operates as both HER cathode and OER anode at 80 mV and 260 mV overpotential at 100 mA/cm2 in 30 wt% KOH (no IR correction).
0.5 A/cm2 @ 60 deg C
Cell-level numbers
In a 5 cm2 AEM cell with bifunctional NiCo and commercial Zirfon separator, 0.5 A/cm2 at 1.62 V at 60 deg C (91.4% efficiency), 1.0 A/cm2 at 1.79 V at 60 deg C.
Stability matching kiln operation
Cement kilns run continuously between major maintenance events. The 1000-hour stability run on bifunctional NiCo + commercial Zirfon (21 uV/hr drift at 0.5 A/cm2 / 40 deg C) supports planning for steady on-site hydrogen production.
Frequently asked questions
Why use a bifunctional NiCo electrode for cement industry decarbonization?
Our bifunctional NiCo electrode operates as both HER cathode and OER anode at 80 mV and 260 mV overpotential at 100 mA/cm² in 30 wt% KOH (no IR correction). For cement industry decarbonization, using a single electrode SKU on both sides simplifies stack BOM and qualification.
What cell-level performance is published?
In a 5 cm² AEM cell with bifunctional NiCo electrode on both sides and a commercial Zirfon separator (500 µm) at zero-gap, the cell logs 0.5 A/cm² at 1.81 V at room temperature (82% efficiency) and 1.62 V at 60 °C (91.4%). At 1.0 A/cm²: 2.05 V at RT and 1.79 V at 60 °C.
What is the stability baseline?
Continuous 1000-hour chronopotentiometry at 0.5 A/cm² and 40 °C in 30 wt% KOH (bifunctional NiCo electrode on both sides, commercial Zirfon separator) showed voltage drift of 21 µV/hr. Before/after linear-sweep polarization curves differ by 30 mV at the operating point.
Is the electrode validated for renewable-coupled operation?
Yes. PV-irradiance-derived current schedules applied for 9 continuous days (peaks ~570 mA/cm²) and wind-variation-derived schedules for 100 hours (0 to 0.78 A/cm²) on the same cell. ΔV at 0.5 A/cm² before and after the 100-hour wind run: 20 mV.
What substrate sizes ship?
The bifunctional NiCo electrode is produced on Ni foam in the 100 to 1000 cm² size range. Bench-scale 5 cm² coupons matching the published test cell are also available so customers can reproduce numbers on their own rig before scaling up.
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