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首页> 外文期刊>Journal of Materials Engineering and Performance >Room Temperature Adsorptive Removal of Thiophene over Zinc Oxide-Based Adsorbents
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Room Temperature Adsorptive Removal of Thiophene over Zinc Oxide-Based Adsorbents

机译：室温吸附在氧化锌基吸附剂上的噻吩

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This study investigated the room temperature adsorptive removal of thiophene over zinc oxide adsorbents in the presence of hydrogen. The bulk zinc oxide was prepared by precipitation method and calcined at different temperatures in the range of 300-550?°C. Supported zinc oxide was prepared by co-precipitation of 30?wt.% ZnO with alumina and calcined at 550?°C. Properties of the adsorbents were determined by various characterization techniques such as surface area and pore volume analysis, XRD, FESEM, EDX and TPR. The desulfurization process was carried out in a down-flow packed bed reactor at room temperature (30?°C). The BET surface area of bulk zinc oxide adsorbents decreased with the increase in calcination temperature from 300 to 550?°C. The surface area of bulk zinc oxide adsorbents was 30.5 and 14.6 m_(2)/g when calcined at 300 and 550 °C, respectively. The surface are of supported zinc oxide adsorbents was 177?m_(2)/g. The highest average pore size was obtained for bulk ZnO calcined at 550?°C (45?nm) compared to that calcined at 300?°C (42?nm) and supported ZnO (27?nm). The XRD peaks corresponded to the hexagonal structure of zinc oxide. The removal of thiophene was most significant for bulk ZnO calcined at 550?°C. The higher removal efficiency for this adsorbent in spite of lower surface area may be attributed to its higher percentage of larger pores and higher average pore size.
机译：本研究研究了室温吸附在氢气存在下在氧化锌吸附剂上除噻吩。通过沉淀法制体制备本体氧化锌，并在300-550℃的不同温度下煅烧。支持的氧化锌通过共沉淀来制备30μlwt。用氧化铝的％ZnO并在550℃下煅烧。通过各种表征技术（如表面积和孔体积分析，XRD，FESEM，EDX和TPR）测定吸附剂的性质。将脱硫过程在室温（30Ω·℃）的下流填充床反应器中进行。大块氧化锌吸附剂的BET表面积随煅烧温度的增加而降低300至550℃。当在300和550℃下煅烧时，本体氧化锌吸附剂的表面积为30.5和14.6m-（2）/ g。表面是支持的氧化锌吸附剂为177μl（2）/ g。与在300℃（42℃）（42μm）和支持的ZnO（27μm）中煅烧，在550℃（45℃）下煅烧的批量ZnO，获得最高的平均孔径。 XRD峰对应于氧化锌的六方结构。除噻吩的除去对于550Ω℃的体积ZnO最显着。尽管有下表面积的这种吸附剂的更高的去除效率可能归因于其较大孔的较高百分比和更高的平均孔径。

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