二甲醚是易液化,便于运输,清洁化的新能源。当作为燃料使用时,采用催化燃烧的方法能使得燃烧的起燃温度降低和提高燃烧转化率,克服了普通燃烧的缺点,实现了清洁燃烧。对二甲醚催化燃烧用的催化剂B aN iA l11O19-δ进行了制备与研究。采用溶胶-凝胶法制备六铝酸盐催化剂B aN iA l11O19-δ,考察其对新能源二甲醚催化燃烧反应的活性,并用TG-DTA对催化剂的性质进行考察。结果表明,加入经800℃焙烧4 h后又在1 200℃焙烧了2 h的催化剂,比未加催化剂的燃烧体系T10降低了50℃。用溶胶-凝胶法制备的六铝酸盐催化剂B aN iA l11O19-δ对二甲醚催化燃烧反应具有较高的催化活性。
A novel reverse microemulsion method was used to prepare SnO2/MgO and SnO2/CaO catalysts. It was found that both the catalysts were active for the reaction of catalytic oxidation of dimethyl ether （DME） in the temperature range of 275 to 300 ℃. SnO2/CaO catalyst exhibits much higher activity than SnO2/MgO. On SnO2/CaO catalyst, DME conversion of 21.8% was obtained at 300℃, while selectivities to methyl formate （MF） and dimethoxyethane （DMET） of 19.1% and 59.0% respectively were obtained at 275 ℃.
