Where 𝐷 (cm) and 𝐿 (cm) respectively represent the inner diameter and length of the reactor; 𝜀 is the porosity of the bed layer; 𝐹 𝑙 is the liquid flow rate; ℎ is the liquid holding capacity. Therefore, we selected the temperature range of 40-80 ℃ and tested the degree of hydrogenation of BN at 1 MPa H2 and 0.8 mL/min. The conversion rate is shown in Fig. . The yielded result was substituted into the reaction equation to calculate the reaction rate constant. Based on the linear fitting results of the Arrhenius equation, we obtained that the activation energy and exponential factor were 53.117KJ/mol and 19.495s -1 , respectively.