摘要
以氯氧化锚（zrOC12·8 H20）和碳酸氢铵（NH4HC03）为原料，采用化学沉淀法制备了二氧他锆微粉。X射线衍射、N2物理吸附和激光粒度分析等测试结果表明，制得的Zr02粉体以单斜栩存在，微晶尺寸42.9nm，具有典型的介孔结构，孔径范围4．5～50nm，平均粒度1．5μm。进一步通过化学还原法制备了高活性高选择性Ru-FejB/ZrO2苯选择加氢制环己烯催化剂。在150℃，5MPa氯压下，考察了负载型催化剂Ru-Fe-B／Zr02的活性和选择性。结果表明，在Rn-Fe-B/ZrO2催化剂土，苯转化81.3％时，环已烯选择性商达70．4％，阿时环己烯选择性随苯转化率升高而缓慢下降。
A novel ultrafine ZrO2 support was successfully synthesized by precipitation method with zirconyl chloride （ZrOCI2-8H20） and NH4HCO3. The results of X-ray diffraction, N2 physical adsorption and Laser Particle Sizer Analysis showed that the prepared ZrO2 particles were monoclinic phases and had a crystallite size of 42.9 nm, a typical mesoporous structure with pore diameters of 4.5-50 nm and a mean particle size of 1,5 μm. The effect of ZrO2 support on catalytic performance of Ru-Fe-B/ZrO2 catalyst was further investigated under the conditions of 150 ℃ and 5 MPa hydrogen pressure. The results showed that over this the catalyst, the selectivity for cyclohexene reached 70.4 % at 81.3 % of benzene conversion. Moreover, the selectivity decreased slowly with the increase of benzene conversion.
出处
《广东化工》
CAS
2013年第4期48-49,60,共3页
Guangdong Chemical Industry
关键词
ZRO2
苯
选择加氢
环己烯
ZrO2 benzene
selective hydrogenation
cyclohenxene
