Abbreviations and codes presented in the publication entitled "Industrial Two-phase Olive Pomace Slurry-Derived Hydrochar Fuel for Energy Applications." Abbreviations of samples: OP = Two phase olive pomace slurry 180-2 = Hydrochar produced at 180 °C with 2 min holding time 180-16 = Hydrochar produced at 180 °C with 16 min holding time 180-30 = Hydrochar produced at 180 °C with 30 min holding time 215-2 = Hydrochar produced at 215 °C with 2 min holding time 215-16 = Hydrochar produced at 215 °C with 16 min holding time 215-30 = Hydrochar produced at 215 °C with 30 min holding time 250-2 = Hydrochar produced at 250 °C with 2 min holding time 250-16 = Hydrochar produced at 250 °C with 16 min holding time 250-30 = Hydrochar produced at 250 °C with 30 min holding time Abbreviations of properties analysed for raw material and hydrochars samples: E = Extractives obtained by hexane solvent extraction AIL = Acid insoluble lignin HY = Hydrochar yield VM = Volatile matter FC = Fixed carbon FCI = Fixed carbon index CDF = Carbon densification factor HHV = Higher heating value EDR = Energy densification ratio EY = Energy yield AI = Alkali index B/A = Base to acid ratio SI = Slagging index FI = Fouling index SVI = Slag viscosity index BAI = Bed agglomeration index STDEV = Standard deviation