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The influence of nano-particles on CO2 absorption was studied experimentally in a stirred thermostatic reactor. Nano-A1203 and carbon nanotube (CNT) particles which showed different hydrophobic properties were chosen for the investigation. The experimental results were compared with that of micron-size activated carbon (AC) and Al2O3 particles. From the results, no enhancement by micron-size A1203 was found, and with the increase of A1203 concentration, the enhancement factor decreased. However, nano-Al203 showed a weak enlaancement tor me COz absorption. AC and CNT particles all intensified the gas-liquid mass transfer effectively, yet the trend of the enhancement factor with stirring speed for the two particles was different. With increasing stirring speed, the enhancement factor of AC particles was decreased, wl'iereas in CNT suspensions it was increased. The experimental phenomena demonstrated a difference in enhancement mechanism for different size particles. For nano-particles, besides the influence of adsorbability and hydrophobicity, the micro-convection caused by Brownian motion should be also taken into account. Considering the micro-convection effect, a theoretical model was developed to shed light on the absorption enhancement bv nano-oarticles. 相似文献
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[目的]明确不同化学杀菌剂与生物农药多抗霉素混配对宁夏压砂西瓜炭疽病的防治效果。[方法]采用菌丝生长速率法、Wadley法和田间喷雾法,测定了4种化学杀菌剂对压砂西瓜炭疽病的室内生物活性和田间防效,并将活性较强、防效较优的化学农药与多抗霉素混配测定其对西瓜炭疽病的协同增效作用。[结果]筛选出防治压砂西瓜炭疽病效果较佳的化学杀菌剂咪鲜胺、苯甲·嘧菌酯2种,并确定了其与多抗霉素的最佳质量配比分别为1∶2、1∶3,平均防效可达82%,均高于单剂防效。[结论]咪鲜胺、苯甲·嘧菌酯可作为宁夏压砂西瓜炭疽病防治的首选化学药剂,与多抗霉素混配对西瓜炭疽病防效优于单剂,可降低化学农药使用量和减少农药抗药性,不同药剂组合可交替使用。 相似文献
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预测1996年钛白粉价格将上扬邢敏译王芳峨校据世界第三大钛白粉制造商SCM化工公司总裁兼首席行政长官─—Denaldforst预测,1996年钛白粉价格将上扬,尽管此行业可能处在低于有效生产能力的状态下运行。他于1995年10月23日在加利福尼亚洲旧... 相似文献
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新闻纸生产商可能面临的反垄断价邢敏译王芳峨校长期以来,大型生产商率先定价的做法,已不再是一种明智的选择,这一点体现在新闻纸价格上尤为突出。司法部在收到一系列报纸出版商有关新闻纸日益升价的投诉后,已开始进行一项调查,针对生产商共同抬价,调查新闻纸产业中... 相似文献
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文章从应用的角度介绍了用于自动化系统的数字伺服变频器与三相异电动机的连接方式,对数字驱动系统原理和优点做了阐述,最后介绍了维护的经验及注意事项。 相似文献
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To investigate the corrosion behaviors and antibacterial effects of sodium hypochlorite(NaClO) and hydrogen peroxide silver ion(HPSI) disinfectants with different concentrations against dental unit waterlines and provide guidance and reference for the use of chemical disinfectants, polyurethane tubes were immersed in ultrapure water(control group), 0.1% NaClO, 0.5% NaClO, 1.0% NaClO, 2.5% HPSI, 5.0%HPSI, and 10% HPSI solutions for 6, 12, and 18 weeks. Contact angles and Fourier transform infrare... 相似文献
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