CO₂ Electrolyzer usage example

The snippet below illustrates how to couple the new CO2Electrolyzer with a CO₂-rich feed, a power supply, and a downstream separator in a ProcessSystem.

import neqsim.process.equipment.electrolyzer.CO2Electrolyzer;
import neqsim.process.equipment.separator.Separator;
import neqsim.process.equipment.stream.Stream;
import neqsim.process.equipment.stream.StreamInterface;
import neqsim.process.equipment.battery.BatteryStorage;
import neqsim.process.processmodel.ProcessSystem;
import neqsim.thermo.Fluid;
import neqsim.thermo.system.SystemInterface;

SystemInterface feedFluid = new Fluid().create2(
    new String[] {"CO2", "water"},
    new double[] {0.95, 0.05},
    "mole/sec");
feedFluid.setTemperature(298.15);
feedFluid.setPressure(20.0);
Stream feedStream = new Stream("CO2 feed", feedFluid);

CO2Electrolyzer electrolyzer = new CO2Electrolyzer("CO2 electrolyzer", feedStream);
electrolyzer.setCO2Conversion(0.55);
electrolyzer.setGasProductSelectivity("CO", 0.7);
electrolyzer.setGasProductSelectivity("H2", 0.3);
electrolyzer.setProductFaradaicEfficiency("CO", 0.9);
electrolyzer.setElectronsPerMoleProduct("H2", 2.0);

// Downstream separation polishing the gas product
Separator syngasPolisher = new Separator("syngas polisher");
syngasPolisher.setInletStream((StreamInterface) electrolyzer.getGasProductStream());

ProcessSystem process = new ProcessSystem("CO2 to fuels");
process.add(feedStream);
process.add(electrolyzer);
process.add(syngasPolisher);
process.run();

double powerDraw = electrolyzer.getEnergyStream().getDuty();
BatteryStorage battery = new BatteryStorage("renewable battery", 5.0e8);
battery.discharge(powerDraw, 1.0 / 3600.0);
System.out.println("Electrolyzer power demand: " + powerDraw + " W");

The gas product stream carries the vapor-phase synthesis gas, the liquid product stream (accessible through getLiquidProductStream()) contains soluble products such as formate or methanol, and the EnergyStream keeps track of the instantaneous electrical duty demanded from the battery.