Application of catalyst taking CeO2-ZrO2-Al2O3 composite oxide as carrier

The invention provides an application of a catalyst taking a CeO2-ZrO2-Al2O3 composite oxide as a carrier in a reaction for preparing furan by decarbonylation of furfural, which comprises the following steps: pumping distilled furfural into a fixed bed reactor filled with the catalyst, enabling the furfural and hydrogen to enter a catalyst bed layer together, and performing decarbonylation reaction on the furfural on the catalyst to generate furan. The decarbonylation catalyst takes a CeO2-ZrO2-Al2O3 composite oxide as a carrier, the loading capacity of an active component Pd is 0.15 to 0.3 percent, and the loading capacity of an auxiliary agent K is 0.5 to 5.0 percent. The catalyst has the advantages of low metal Pd loading capacity, high activity, good selectivity, long service life and the like. The furfural decarbonylation reaction is carried out under normal pressure, the reaction temperature is 250-300 DEG C, the liquid feeding volume space velocity is 0.5-0.8 h , the molar ratio of hydrogen to fur