Low-temperature dehydrogenation method of hydrogenated aromatic compound

The invention discloses a low-temperature dehydrogenation method of hydrogenated aromatic compounds, which comprises the following steps: adding a raw material rich in hydrogenated aromatic compounds and a dehydrogenation catalyst into a dehydrogenation reactor, and carrying out dehydrogenation reaction under the conditions that the temperature is 240-420 DEG C, the pressure is 0.01-2MPa, the mass space velocity is 1-5h and the molar ratio of hydrogen to oil is 0-1.0; the dehydrogenation catalyst is a non-sulfurized catalyst and comprises an active component, a metal additive, chloride ions and a carrier, the active component at least contains a group VIII noble metal component and accounts for 0.1-3% of the total weight of the dehydrogenation catalyst; the chloride ions account for 0.3-1.2% of the total weight of the dehydrogenation catalyst; the metal additive at least contains alkali metal and/or alkaline earth metal and accounts for 0.3-0.9% of the total weight of the dehydrogenation catalyst; the m