Hydrogen: Difference between revisions

Hydrogen
Phase Change Information
Specific Heat	20.4 J/mol*K
Latent Heat	200 J/mol
Min Condensation Pressure	6.3 kPa at 15.18 K (-257.97 °C)
Max Liquid Temperature	70.06 K (-203.09 °C) at 6000 kPa
Freezes at	15.18 K (-257.97 °C)
Liquid Volume	0.028 L/mol
Molar Mass	2 g/mol
	v; t; e;

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Latest revision as of 20:40, 31 July 2026

Stationpedia

Hydrogen is the most efficient fuel by weight for rocketry. When mixed with Oxygen it will cleanly combust into Steam.

Description

Hydrogen or H₂ is a combustible gas. The main source of Hydrogen on most planets is in the form of Ice (Volatiles) that can be mined on the surface. Hydrogen will autoignite at 573.15 K (300.0 °C) or above in the presence of Oxygen, autoignite at 150°C in the presence of Ozone and autoignite at 50°C in the presence of Nitrous Oxide.

Combustion

2x + 1x = 3x + 612 kJ (Autoignites at 573.15 K (300.0 °C))
1x + 1x = 1x + 1x + 612 kJ (Autoignites at 323.15 K (50.0 °C))
3x + 1x = 4x + 1836 kJ (Autoignites at 423.15 K (150.0 °C))

Usage

See also: Fuel

While Hydrogen is a superior fuel for rocketry, there is currently no way to refine it from Methane, limiting its available supply. As such, it is recommended to combine it with Nitrous Oxide or Ozone in rocketry applications to maximize its effectiveness.

A suggested alternative use is as a working gas for a Stirling Engine, where it can achieve a conversion efficiency of 18%, surpassing the efficiency of Methane and tying it with Helium.

Hydrogen also has the lowest freezing point of all gases capable of phase change, making it the only choice for extreme cryocooling applications. However, its limited latent heat capacity hinders its performance in that task.

Notes

The Specific heat of 20.4 Joule / mol is in-between the specific heat of Hydrogen and Methane in real-life.
The actual Autoignition temperature of Hydrogen in Oxygen is approximately 570 °C at 1 atm, decreasing to 414°C at 7.4 MPa.
Unlike Methane, Hydrogen is not toxic to most plants in-game.
As far as rocketry is concerned, Hydrogen has a mass of 500 mol/kg (2 g/mol).

Sources

Hydrogen can be obtained by processing Water in an Electrolyzer or acquired from traders and rocket mining.
Additionally, Hydrogen can be collected from the following sources:

Source	Amount
Ice (Volatiles)	2 mol

References

Gases and Liquids
Elements	Compounds	Mixtures	Other
		Fuel (66.6% H₂ + 33.3% O₂) Superfuel (50% H₂ + 50% N₂O) Air (75% N₂ + 25% O₂)	Atmosphere Coolant

@@ Line 1: / Line 1: @@
-#REDIRECT [[Volatiles]]
+{{Infobox gas
+| gas_name = Hydrogen
+| image = Icon-Hydrogen.png
+| heat = {{Gas/Property|Hydrogen|SpecificHeat}} J/mol*K
+| latent_heat = {{Gas/Property|Hydrogen|LatentHeat}} J/mol
+| minimum_condensation = {{Gas/Property|Hydrogen|TriplePressure}} kPa at 15.18 K (-257.97 °C)
+| max_liquid = 70.06 K (-203.09 °C) at {{Gas/Property|Hydrogen|CriticalPressure}} kPa
+| freezes = 15.18 K (-257.97 °C)
+| coefficient_a = {{Gas/Property|Hydrogen|A}}
+| coefficient_b = {{Gas/Property|Hydrogen|B}}
+| thermal_efficiency = {{Gas/Property|Hydrogen|ThermalEfficiency}}
+| enthalpy = {{Gas/Property|Hydrogen|Enthalpy}} kJ / mol
+| liquid_volume = {{Gas/Property|LiquidHydrogen|MolarVolume}} L/mol
+| molar_mass = {{Gas/Property|Hydrogen|MolarMass}} g/mol
+| heat_capacity_ratio = {{Gas/Property|Hydrogen|HeatCapacityRatio}}
+}}
+[[File:Phase Diagram of Hydrogen.png|thumb|Phase Diagram of Hydrogen]]
+{{Stationpedia|Hydrogen is the most efficient fuel by weight for [[rocketry]]. When mixed with  [[Oxygen]] it will cleanly combust into [[Water|Steam]].}}
+== Description ==
+'''Hydrogen''' or '''H<sub>2</sub>''' is a combustible gas. The main source of Hydrogen on most [[planets]] is in the form of [[Ice (Volatiles)]] that can be mined on the surface. Hydrogen will autoignite at {{Temperature|Temperature={{Gas/Property|Hydrogen|AutoignitionTemperature}}}} or above in the presence of [[Oxygen]], autoignite at 150°C in the presence of [[Ozone]] and autoignite at 50°C in the presence of [[Nitrous Oxide]].
+=== Combustion ===
+* {{Combustion|Fuel=Hydrogen, 2|Oxidizer=Oxygen, 1|OutputA=Steam, 3|ShowAutoignition=true}}
+* {{Combustion|Fuel=Hydrogen, 1|Oxidizer=Nitrous Oxide, 1|OutputA=Steam, 1|OutputB=Nitrogen, 1|ShowAutoignition=true}}
+* {{Combustion|Fuel=Hydrogen, 3|Oxidizer=Ozone, 1|OutputA=Steam, 4|ShowAutoignition=true}}
+== Usage ==
+''See also: [[Fuel]]''
+While Hydrogen is a superior fuel for rocketry, there is currently no way to refine it from [[Methane]], limiting its available supply. As such, it is recommended to combine it with [[Nitrous Oxide]] or [[Ozone]] in rocketry applications to maximize its effectiveness.
+A suggested alternative use is as a working gas for a [[Stirling Engine]], where it can achieve a conversion efficiency of 18%, surpassing the efficiency of [[Methane]] and tying it with [[Helium]].
+Hydrogen also has the lowest freezing point of all gases capable of phase change, making it the only choice for extreme cryocooling applications. However, its limited latent heat capacity hinders its performance in that task.
+===Notes===
+* The Specific heat of {{Gas/Property|Hydrogen|SpecificHeat}} Joule / mol is in-between the specific heat of Hydrogen and Methane in real-life.
+* The actual Autoignition temperature of Hydrogen in Oxygen is approximately 570 °C at 1 atm, decreasing to 414°C at 7.4 MPa.
+* Unlike [[Methane]], Hydrogen is not toxic to most [[plants]] in-game.
+* As far as rocketry is concerned, Hydrogen has a mass of 500 mol/kg ({{Gas/Property|Hydrogen|MolarMass}} g/mol).
+==Sources==
+Hydrogen can be obtained by processing [[Water]] in an [[Electrolyzer]] or acquired from [[traders]] and rocket mining.<br>Additionally, Hydrogen can be collected from the following sources:
+{| class="wikitable"
+|-
+! Source !! Amount
+|-
+| [[Ice (Volatiles)]] || 2 mol
+|}
+== References ==
+<References />
+{{:Gases and Liquids/Menu}}
+[[Category:Gas]][[Category:Liquid]]