The control of low concentration VOCs in coal flue gas is one of the research hotspots at present. Activated carbon (AC) is often used as adsorbent for the control of VOCs due to its rich pore structure and thermal stability. In this paper, agricultural wastes pistachio shell was used as biomass AC raw materials, K2CO3 and KCl was used as activators. High surface area and high porosity activated carbon can be produced by the two activators used together. By comparing the differences in pore size structure and functional groups between biomass AC and commercial AC, it was found that biomass AC had better properties. The adsorption performance of different ACs on low concentration VOCs was tested at low-medium temperatures. It is concluded that biomass AC has excellent adsorption performance, and its maximum adsorption capacity can reach 3.8 times that of commercial AC. All the three adsorption kinetic models had good fitting on the adsorption process of ACs, indicating that physical adsorption is dominant in the adsorption process, while chemical adsorption existed. Using the Weber-Morris kinetic model to fit the adsorption process, it was found that the stage of external membrane mass transfer is the control stage of adsorption rate.