IC2 Coke is a refined coal fuel that burns about four times longer than Coal in any furnace.
Guide
Mine Coal ore with a Stone Pickaxe or better in Minecraft Java Edition with IC2 installed. You need a stack of Coal to make Coke worthwhile, since each Coke requires multiple Coal items through IC2's refinement steps.
Use IC2's compression and smelting recipes to convert Coal into the Coke item (registry id ic2:coke). Do not confuse this with Railcraft's Coke Oven multiblock — IC2 Coke is produced through furnace-based refinement, not a Coke Oven.
Place Coke into the IC2 Generator's fuel slot. The Generator will produce EU energy from Coke for far longer per item than it would from Coal or Charcoal.
Coke also works in any normal Minecraft furnace. One Coke smelts roughly four times as many items as one Coal, making it the best bulk-smelting fuel in an IC2 modpack.
Store Coke in a chest near your furnaces and Generator. Because Coke burns so long, a small stockpile keeps your base smelting and powered for an entire play session.
IC2 Coke is produced by refining Coal through IC2's compression and smelting recipes, not in a Coke Oven. The end product is the ic2:coke item.
No. Railcraft's Coal Coke is crafted in a Coke Oven multiblock. IC2's Coke is a separate item with id ic2:coke, made through IC2's own refinement chain.
Coke is the most efficient solid fuel in IC2, burning roughly four times longer than regular Coal and noticeably longer than Charcoal.
Yes. Coke works in any standard Minecraft furnace as a drop-in replacement for Coal and gives you far more smelts per item.
No. Coke is a Java Edition modded item from IC2 only; Bedrock Edition does not support IC2 and does not have this fuel.
No. Coke is a furnace and IC2 Generator fuel only — vanilla torches still require Coal or Charcoal in the recipe.