This repository contains time-resolved experimental data for the methanol synthesis on a CuO/ZnO/Al2O3 catalyst recorded in a gradientless Berty type reactor at the Max Planck Institute for Dynamics of Complex Technical Systems in Magdeburg. The supplied gaseous educts were hydrogen, carbon monoxide and carbon dioxide. Nitrogen was used as a diluent and tracer. The applied analytics is a micro-GC from Agilent (Model 490). All experiments were conducted with the same commercial catalyst (BASF S-3-86). The reactor has been filled several times with fresh catalyst samples. The fills are indicated as charge numbers. The catalyst was a leftover from a former PhD project (Vollbrecht 2007). A particle size fraction of 0.315-0.5 mm prepared by grinding pellets was used. To ensure almost ideal CSTR behaviour, a stirrer speed of at least 3000 rpm had been experimentally determined. Reported data acquired at < 3000 rpm may be affected by mixing non-ideality. The feed gas components had a purity of at least 99.97 vol.-%. The piping and devices were heated to avoid condensation. The total outlet flow rate was not measured. The reactor pressure was controlled with a dome pressure regulator which releases gas from the reactor to keep the desired value. If the set value of pressure is increased, the outlet flow rate is decreased to fill the reactor. Then, the flow rate to the analytics may be insufficient for proper analysis. Thus, the GC data measured during significant pressure changes in the reactor (not fluctuations < 0.5 bar) or at low reactor pressures ( Exp-No MeOH_042 -> EXP1 MeOH_043 -> EXP2-EXP6 MeOH_044 -> EXP7-EXP10 MeOH_097 -> EXP11 https://doi.org/10.1002/cctc.202501403