The process of thermocatalytic reforming of cellulose has been studied by using solar energy. It has been established that the process of conversion proceeds through depolymerization stages of cellulose with formation of hexoses including following the dehydration of three molecules water, first and secondary conversion. It is shown that carbohydrate of compound [6C(H2O)(3) undergoes thermocatalytic conversion by water steam. In addition, the possibility of obtaining synthesis-gas [H-2+CO] with temperatures of 700-750 degrees C on the catalyst Pt/Al2O3 is shown. The dependence of gasiformation on temperature and degree of dilution by water steam has been studied.