中文摘要：

获得较高活性、高强度的适用于固定床工艺的成型HZSM-5分子筛催化剂对推进乙醇脱水制乙烯工业应用有着积极的意义。采用磷酸、硅溶胶以及羧甲基纤维素钠等作为助剂，制备了系列成型HZSM-5分子筛，研究了磷酸添加量对分子筛抗压强度及催化乙醇脱水活性的影响。结果表明，在无磷酸添加时，成型抗压强度仅为20．5N／cm；而添加磷酸后，成型HZSM-5的抗压强度明显提高，当P添加量达到3．3wt％时抗压强度达到最高值为120．9N／cm；可满足固定床工艺需求；而继续增加磷酸添加量，HZSM-5的抗压强度逐渐减弱，随着磷酸添加量的增加，催化剂的活性逐步下降。当P添加量达到3．3wt％时，在320℃，乙醇浓度50wt％以及质量空速2．0h^-1条件下，乙醇转化率为97．9％，乙烯选择性为97．8％，较好地兼顾了工业上对催化剂强度及活性需求。

英文摘要：

Suitable forming strength is important for efficient HZSM-5 catalysts＇ industrial application in a fixed-bed process of the ethanol dehydration. Phosphoric acid, silica and sodium carboxymethyl cellulose were used as additives to pre- pare a series of HZSM-5 catalysts. The effects of phosphoric acid content on the compressive strength of the catalysts and the dehydration activity were investigated. The results showed that the compressive strength of HZSM-5 was only 20. 5 N/cm without phosphoric acid, while it was improved significantly after the adding of phosphoric acid. Especially, the compressive strength achieved the highest value 120. 9 N/em with 3.3 wt% P, meeting the industrial demand of a fixed-bed process. Then the compressive strength of HZSM-5 gradually showed a decline with the increasing content of phosphoric acid. Meanwhile,the catalyst activity also gradually decreased. When P content reached 3.3 wt% , ethanol conversion and ethylene selectivity reached 97.9% and 97.8% respectively, under the reaction conditions of temperature 320 ℃ ,ethanol concentration 50 wt% and WHSV 2.0 h-l. The HZSM-5 with 3.3 wt% P could meet the industrial requirements for strength and activity of catalyst.