【摘要】 该文利用共沉淀法制备铁酸锌系列脱硫剂,并在固定床反应器上对其进行硫化试验,然后对其中活性较好的ZFD7脱硫剂进行硫化和再生循环试验,最后用强度仪、XRD仪 及气体吸附仪对该类脱硫剂在硫化和再生前后的机械强度与有关结构特性进行比较。结果表明:添加高岭土粘结剂的脱硫剂脱硫效果较好;循环试验中,硫化再生后脱硫剂的机械强度均大于新鲜样品,说明该类脱硫剂具有良好的抗磨损性能;试验还证实经3次循环后脱硫剂的结构、孔容积及比表面积均与新鲜样品相类似,表明该类脱硫剂在试验条件下未发生明显失活,因而具有一定的工业应用潜力。更多还原

【Abstract】 Series of ZnFe2O4 sorbents have been prepared by the co-precipitation method. Firstly, sulfidation tests were carried out in a fixed-bed reactor to evaluate sorbents performance. Then the type ZFD7 sorbents with better reactivity are performed during three cycles of sulfidation and regeneration. Finally, mechanical strength and structure properties of the sorbents before/after sulfidation and regeneration are characterized by strength tester, x-ray diffractometer(XRD) and gas absorption meter. The test results demonstrate that sorbents with different binder have different sulfidation property, while the Kaoline employed sorbents are better for sulfidation. The type ZFD7 sorbents have a better resistance to attrition, because their mechanical strength after the tree cycles of sulfidation and regeneration is stronger than that of the fresh ones. After the three cycles, the structure, pore volume and specific surface area of the samples are similar to those of the fresh ones, so it is concluded that this type ZnFe2O4 sorbents have no apparent deactivation during the cycles and they have more potential in the industrial utilization.更多还原