If you're looking for Refined Carbon in Abiotic Factor, that's probably because you've finally made it to Cascade Laboratories. Cascade is one of the meanest, most dangerous, and downright fascinating wings of GATE.
It's also a location you'll be returning to often, as it's host to an infinite supply of Refined Carbon (one of the most important mid-game crafting materials in the game) if you've got the right stuff to exchange. It's a little tough to come by at first, but farming Refined Carbon becomes a breeze once you know where to look.
