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考察了催化剂Al 2O3·Na2O·xH2O/NaOH/Al(OH)3催化木质素水蒸气气化制氢及其影响因素.结果表明,木质素气化的产氢速率随Na 2O/C比值的升高而升高;木质素在较低的温度下气化时,较高的水蒸气流速有利于抑制CO和CO 2的生成.产氢速率随水蒸气流速的增大而增大.催化剂中的铝酸钠水合物受热分解产生的水可导致催化剂中的NaOH组分产生更多的Na +和OH -离子.更多的Na +和OH -离子可使木质素中C-H键的键能更显著的降低.木质素在473K～973K气化的氢转化程度可达134.94%,这表明催化剂Al 2O 3·Na 2O·x H 2O/NaOH/Al(OH) 3对木质素低温水蒸气气化制氢具有较好的催化活性.“,”Some influencing factors on hydrogen production from steam gasification of lignin with Al 2O 3·Na 2O·x H 2O/NaOH/Al(OH) 3 catalyst in a fixed bed reactor were examined. The results show that the formation rates of hydrogen increase with increasing ratio of Na 2O/C and ratio of vapor to lignin as a whole. Higher flow rate of vapor is conducive to inhibit the generation of CO and CO 2 at lower temperature. H 2O(g) produced by the hydrates contained in the catalyst can bring on more Na + and OH - ions to be formed by dissociation of NaOH within the catalyst. This leads to more remarkable reduction of the C-H bond energies of lignin. The conversion degree of hydrogen of lignin at 473K~973K reaches 134.94%, which shows that the present catalyst has good catalytic activity on hydrogen production from steam gasification of lignin at low temperature.