...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemosphere >Influence of fluorocarbon flat-membrane hydrophobicity on carbon dioxide recovery
【24h】

Influence of fluorocarbon flat-membrane hydrophobicity on carbon dioxide recovery

机译：碳氟化合物平膜疏水性对二氧化碳回收的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The influence of hydrophobicity in flat-plate porous poly(vinylidene fluoride) (PVDF) and expended poly-tetrafluoroethylene (PTFE) membranes on CO_2 recovery using aqueous solutions of piperazine (PZ) and alkanolamine is examined. Experiments were conducted at various gas flow rates, liquid flow rates, and absorbent concentrations. The CO_2 absorption flux increased with increasing gas flow rates and absorbent concentrations. When using 2-amino-2-methyl-l-propanol (AMP) or AMP + PZ aqueous solution as absorbent, this process was dominantly governed by gas film layer diffusion and membrane diffusion. The diffusion resistance of the membrane phase was only important when using N-methyldiethanolamine as the sole absorbent. The water contact angle increased initially with increasing plasma working power and reached at steady state value of 155~° beyond 100 W. The elemental fluo-rine-to-carbon ratio (F/C) and water contact angle of the PVDF membrane increased with increasing treatment time and reached a plateau after 5 min of CH_4 plasma (100 W). Increases in the CO_2 absorption fluxes of 7% and 17% were observed for plasma-treated PVDF membranes in comparison to non-treated PVDF and PTFE, respectively, when using 1 M AMP as absorbent. The membrane mass transfer coefficient, k_m, for plasma-treated PVDF membranes increased from 2.1 × 10~(-4) to 2.5× 10~(-4) m s~(-1). Membrane durability was greatly improved by CF_4 plasma treatment (100 W/5 min) and comparable to that of PTFE membranes.
机译：考察了平板多孔聚偏二氟乙烯（PVDF）和膨胀聚四氟乙烯（PTFE）膜中疏水性对使用哌嗪（PZ）和链烷醇胺的水溶液回收CO_2的影响。在各种气体流速，液体流速和吸收剂浓度下进行了实验。随着气体流速和吸收剂浓度的增加，CO_2吸收通量增加。当使用2-氨基-2-甲基-1-丙醇（AMP）或AMP + PZ水溶液作为吸收剂时，该过程主要由气膜层扩散和膜扩散决定。膜相的抗扩散性仅在使用N-甲基二乙醇胺作为唯一吸收剂时才重要。水接触角最初随着等离子体工作功率的增加而增加，并在超过100 W时达到稳态值155〜°。PVDF膜的元素氟-碱/碳比（F / C）和水接触角随CH_4血浆（100 W）5分钟后达到了稳定水平。当使用1 M AMP作为吸收剂时，与未经处理的PVDF和PTFE相比，经等离子体处理的PVDF膜的CO_2吸收通量分别增加了7％和17％。等离子体处理的PVDF膜的膜传质系数k_m从2.1×10〜（-4）m s〜（-1）增加到2.5×10〜（-4）m s〜（-1）。 CF_4等离子体处理（100 W / 5分钟）大大提高了膜的耐用性，与PTFE膜相当。

著录项

  • 来源
    《Chemosphere》 |2009年第10期|1410-1416|共7页
  • 作者

    Su-Hsia Lin; Kuo-Lun Tung; Hao-Wei Chang; Kueir-Rarn Lee;

  • 作者单位

    Department of Chemical and Material Engineering, Nanya Institute of Technology, Chung-Li 32091, Taiwan, ROC;

    R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan, ROC;

    R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan, ROC;

    R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li 32023, Taiwan, ROC;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    carbon dioxide absorption; piperazine; 2-amino-2-methyl-1-propanol; poly(vinylidene fluoride) membrane; plasma treatment; surface modification;

    机译：二氧化碳吸收哌嗪2-氨基-2-甲基-1-丙醇;聚偏二氟乙烯膜;等离子处理表面改性;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号