海泡石对非晶态NiB合金催化剂的改性研究

以常压气相苯加氢为探针反应，首次考察了酸性前后海泡石的加入对非晶态ＮｉＢ合金催化剂的加氢及抗硫性能的影响，用ＴＰＲ、ＴＰＤ表征了催化剂的表面性质，测定了酸改性前后海泡石的比表面及孔径分布，并与活性进行了关联。结果表明，加入海泡石显著地提高非晶态ＮｉＢ合金的催化活性和抗硫性；提高的幅度随制备方法的不同而异。其原因为ＮｉＢ与海泡石之间存在相互作用，改变了ＮｉＢ合金的还原性能和吸附性能，酸改性后脱镁率脱

Studies on the Modification of Sepiolite for Amorphous NiB Alloy Catalyst

The pulse microreactor technique was used to examine the effect of addition of sepiolite on the catalytic and surface porperties of amorphous NiB alloy. Gas phase hydrogenation of benzene was chosen as the probe reaction. The surface properties of the alloys were characterized by TPR and TPD.The specific surface area and distribution of pore diameter were determined,and were correlated with the activity of the samples. Results indicated that the addition of sepiolite increased the activity and sulfur resistance of amorphous NiB alloy.Comparing two kinds of preparation methods, it can be seen that impregnation was superior to mechanically mixing. The probable reason is that there is interaction between sepiolite and NiB alloy,which changes the reduction and absorption charaters.The activities of the samples containing sepiolite treated with acid are higher than that of the untreated sample because acid treatment alters the distribution of the pore diameter in sepiolite.