In this project it is carry out the pyrolysis of oil shale, the pyrolysis of biomass and the copyrolysis of oil shale and biomass using the batch reactor. It is used nitrogen as an inert gas in order to ensure pyrolysis at different temperatures so as to perform the experimental part. Temperatures chosen in this project are 550ºC, 750ºC and 900ºC. The first one is the temperature at which the highest yield of shale oil is achieved in the co-pyrolysis process, whereas the other two are used in order to make a comparison with the first one. The first objective for the thesis is to observe the effect of the mass losses in order to compare them with other experiments that have already been carried out in this field. The second objective set is to characterize the product gases at different temperatures using the FTIR. Moreover, the concentration per mass of organic matter is calculated and the measured and calculated concentrations in co-pyrolysis are compared. In addition, the composition of the gas mixture is analyzed, using the GC-TCD and compared with calculated results. Finally, the evolution of the char obtained in each experiment for the different temperatures used is also observed