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liulp2008木蟲 (小有名氣)
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| The micropores (zeolitic pores) and mesopores (non-zeolitic pores) were characterized through N2 adsorption experiments, as shown in Table 1. The surface area of the geopolymer dramatically increases from 6.57 to 97.81 m2/g after the hydrothermal process. The micropore volume (t-plot method according to Lipens and de Boer) of the geopolymer dramatically increased from 0 to 0.049 cc/g, but the mesopore volume decreased from 0.035 cc/g to 0.004 cc/g (Barrett-Joiner-Halenda (BJH) desorption method). The external mesopore surface area of the geopolymer decreased from 6.57 to 2.16 m2/g after the hydrothermal process, likely due to grain reconstruction, precipitation, and dissolution during the crystallization process through which the geopolymer was transformed into a NaA zeolite. The mesopore size distribution of hydrothermal sample was obtained by the BJH（Barrett-Joiner- Halenda）method with desorption data, and is shown in the iconograph in Fig.4. The average mesopore diameter of the hydrothermal sample where Pore Diameter Dv(d) = 3.77 nm. In the zeolite membrane for pervaporation, the effect of the separation was determined by the non-zeolitic pores of the zeolites. Less non-zeolitic pores and smaller pore sizes resulted in a higher separation factor during the pervaporation process. In the self-supporting NaA membrane, the non-zeolitic pores were primarily mesopores. Table 1 presents the results from the BET measurements. |
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baoshanqiu
至尊木蟲 (著名寫手)
- 翻譯EPI: 204
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- 蟲號(hào): 3856202
- 注冊(cè): 2015-05-08
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- 專業(yè): 胃腸道免疫相關(guān)疾病
【答案】應(yīng)助回帖
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liulp2008: 金幣+26, 翻譯EPI+1, ★★★★★最佳答案 2015-06-17 21:52:32
liulp2008: 金幣+26, 翻譯EPI+1, ★★★★★最佳答案 2015-06-17 21:52:32
| 微孔（沸石孔）和間孔（非沸石孔）的特性用氮吸附實(shí)驗(yàn)測(cè)定，如表1所示。經(jīng)水溫處理后地質(zhì)聚合物的表面積由6.57急劇增加到97.81m2/g。地質(zhì)聚合物微孔體積（根據(jù)Lipens 和 de Boert-點(diǎn)法）由0急劇增加到0.049cc/g, 而間孔體積由0.035cc/g減小到0.004cc/g(Barrett-Joiner-Halenda (BJH)解吸法）。地質(zhì)聚合物外間孔表面積在水溫處理后有6.57減小為2.16m2/g，可能由于在地質(zhì)聚合物轉(zhuǎn)化為NaA沸石的結(jié)晶過(guò)程中顆粒重建、沉淀和溶解造成。水溫樣品間孔大小的分布是用BJH（Barrett-Joiner- Halenda）法的解吸資料獲得，見圖4中的插圖。水溫樣品間孔的平均直徑Dv(d) = 3.77 nm。在全蒸發(fā)用的沸石膜中，分離效率是由沸石的非沸石孔決定的。在全蒸發(fā)過(guò)程中，非沸石孔越少和孔越小分離因子越高。在自身支持NaA膜中，非沸石孔是主要的間孔。表1為BET法測(cè)定的結(jié)果。 |
2樓2015-06-17 03:44:43
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