甲醇氧化制甲醛铁钼催化剂的研究

Study on the Fe-Mo Catalyst for the Preparation of Formaldehyde by Methanol Oxidation

采用共沉淀法制备甲醇氧化制甲醛无载体铁钼催化剂，并考察了催化剂制备老化条件、焙烧温度、外型尺寸以及活性测试反应温度、空速对催化剂性能的影响。该催化剂在280～300℃、气空速7000h^-1～8000h^-1、进料妒（甲醇）为5．5％的下，可获≥98％的甲醇转化率，≥92％的甲醛选择性和≥90％的甲醛产率。催化剂活性高，强度好，性能稳定。

The Fe-Mo catalyst for oxidation of methanol to formaldehyde was prepared by co-precipitation, and the effects of aging conditions in catalyst preparation, calcination temperature, catalyst shapes, reaction temperature and feed space velocity on the catalyst behaviors were investigated. The catalyst could obtain a methanol conversion of above 98%, a formaldehyde selectivity of above 92% and a formaldehyde yield of above 90% at the conditions of reaction temperature 280-300℃, GHSV 7000-8000 h^-1, and methanol volume fraction in feed gas 5.5%. The catalyst had high activity, strength and stability.