ExxonMobil Chemical Plant

The ExxonMobil Chemical Plant (Chem Plant) is an MV tier multiblock for advanced chemical reactions. That includes the manufacturing of rocket fuels, nitrobenzene, algae chemistry, the Dangote Distillus, and mutating living solder. The Chem Plant has four independently tiered components and each one changes something different about the machine. The most significant of the four is the metal machine casings which determine the tier of the machine and therefore which recipes it can run. The Chem Plant is generally superseded by the Quantum Force Transformer in UEV, although not for everything.

The Chem Plant has four different tiered components. The metal machine casings determine the tier of the machine and therefore which recipes it can run. The machine casings determine the maximum voltage tier of the buses/hatches, including the energy hatch. The pipe casings determine the number of parallels and catalyst consumption. The heating coils determine the speed of the machine. Multi-amp and laser energy hatches are not supported, but there can be multiple regular energy hatches for overclocking. Use the Multiblock Structure Hologram Projector to visualize/build the structure with subchannels "casing", "machine_casing", "coil", and "pipe" to specify the tier of those components.

Unique to the Chem Plant is the catalyst housing which is effectively an input bus for the catalysts used in recipes. The housing has 16 active slots (right side) and 16 queue slots (left side) which automatically push catalysts over to the active side if there is enough room. Catalysts are not recognized anywhere else, including in an input bus.

Structure

• Controller: Front bottom center
• 70-91 Metal Machine Casing (Tiered)
• 57 Machine Casing (Tiered)
• 27 Heating Coil (Tiered)
• 18 Pipe Casing (Tiered)
• 0-1 Catalyst Housing: Any metal machine casing
• 1+ Energy Hatch: Any metal machine casing
• 1 Maintenance Hatch: Any metal machine casing
• 1+ Input Bus/Hatch: Any metal machine casing
• 1+ Output Bus/Hatch: Any metal machine casing

The following tables summarize the benefits of each tiered component. Be very careful to not turn the machine casings into machine hulls! The length of a recipe with a base processing time of 16.0s and no overclocks is provided as a reference for the heating coil speed bonuses. There is no maximum hatch tier for UHV machine casings, effectively removing the restriction. The chance to damage catalyst is reduced from 20% to 0% if the Chem Plant has tungstensteel pipe casings and at least awakened draconium coils.

The heating coil speed bonus does NOT increase the power consumption of the Chem Plant since the EU/t remains the same despite running for a shorter amount of time. That means higher tier coils indirectly provide an EU discount as well.

Wallsharing

Chem Plants may wallshare each of their sides to save on metal casings and buses/hatches. That includes the catalyst housing and maintenance hatch. It is highly recommended to share the 49 metal casings on the top layer because they are the most expensive part of the structure, especially for the last two tiers of metal casings.

The only particularly unique mechanic about the Chem Plant is the consumption of catalyst in some recipes. Catalysts act similar to non-consumable items except they degrade over time and eventually need to be replaced. The probability of damaging a catalyst depends on the tier of the pipe casings, although there is an opportunity for it to drop to 0% if the Chem Plant has tungstensteel pipe casings and at least awakened draconium coils. The amount of damage is only one per parallel and occurs at the very start of recipes so it does not matter if the machine powerfails half-way through. The following table lists all the available catalysts, their durabilities, and the recipes that they are used for.
Note: When using a crafting input buffer the player should put the catalyst in both the input buffer and the catalyst housing for the recipe to work.

• The Chem Plant has the most tiered components (4) out of any multiblock in GTNH.