Refinery
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In order to utilize items for the refinery, they must be added to one of the following groups:
flora, leaves, flower, sapling, tree, wood, stick, plant, seed

Example:
groups = {plant = 1, snappy = 3, flammable = 2, attached_node = 1, not_in_creative_inventory=1},

Biofuel:
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To fill an item in the canister, it must be added to the biofuel group.

Example:
groups = {biofuel = 1, dig_immediate = 3, attached_node = 1, vessel = 1},