The cheap manganese sand was first modified by H

2

O

2

and was further creatively utilized as Ni-based catalyst support. In order to enhance the catalytic performance

Re was added into the Ni-based catalyst and the promotion effect of Re on the methanation coupling with water gas shift of biogas was investigated from the perspective of activation energy. It was found that CH

4

and CO

2

formation rates

which separately represented the reaction rate of methanation and water gas shift

were both enhanced after Re addition compared to non-added catalyst. Two kinetics models including empirical model and K-model were employed and from the results of calculation

it showed that Re selectively decreased the activation energy of methanation reaction and had little impact on the activation energy of water gas shift. The increased CO

2

formation rate was owing to the assistance of accelerated H

2

O production from methanation rather than the activation energy change in water gas shift.