Mass-production of tubular NaY zeolite membranes for industrial purpose and their application to ethanol dehydration by vapor permeation
Mass-production of tubular NaY zeolite membranes for industrial purpose and their application to ethanol dehydration by vapor permeation
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DOI：
10.1016/j.memsci.2008.03.041
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发表时间：
2008-07-01
影响因子：
9.5
通讯作者：
Nakane, Takashi
中科院分区：
文献类型：
--
作者：
Sato, Kiminori;Sugimoto, Kazunori;Nakane, Takashi
采用Al2O3:SiO2: Na2O: H2O = 1:10:14:800和= 1:20:14:1000两种合成溶液合成了99个工业用80cm管状NaY沸石膜样品。在75℃下，在水(10 wt.%)/乙醇（90 wt.%）的混合料中进行渗透蒸发，观察到具有足够的再现性，可用于工业用途，并在大规模生产中具有较高的膜性能，结果表明，富sio2合成溶液的平均通量（1 - sigma）和分离系数（-1）分别为8.1 kg m(-2) h（-1）和220，低sio2合成溶液的平均通量和分离系数分别为9.9 kg m(-2) h-1（1.3）和190。在90 ~ 110℃的条件下，研究了该膜对含水乙醇的水蒸气渗透脱水，考察了该膜对乙醇净化的适用性。在110℃条件下，以5 kg h（-1）和20 kg h（-1）的生产速率，可得到浓度高达98.5% wt.%和96.1 wt.%的乙醇产品。在5.5 ~ 22 kg h（-1）的进料流速和5000 ~ 20000的雷诺数条件下，浓度极化会限制膜的渗透通量。(c) 2008 Elsevier B.V.版权所有
A fabrication method for tubular NaY zeolite membranes with 80 cm long for industrial purpose has been applied in mass-production to synthesize 99 membrane samples using two types of synthetic solutions with Al2O3:SiO2: Na2O: H2O = 1: 10: 14:800 and = 1:20:14: 1000. Sufficient reproducibility for industrial purpose with high membrane performance in mass-production were observed by pervaporation at 75 C in a feed mixture of water(10 wt.%)/ethanol(90 wt.%), resulting in the average flux (1 - sigma) and separation factor of 8.1 kg m(-2) h(-1) (1.5)and 220 for the SiO2-rich synthetic solution and those of 9.9 kg m(-2) h-1 (1.3) and 190 for the SiO2-poor solution, respectively.Dehydration of hydrous ethanol by vapor permeation for the present membranes was studied at 90-110 degrees C to investigate an applicability of these membranes to ethanol purification. The ethanol products with concentration up to 98.5 wt.% and with 96.1 wt.% could be obtained at 110 degrees C by production rates at 5 kg h(-1) and 20 kg h(-1), respectively. It is also confirmed that concentration polarization could limit the permeation fluxes through the present high-performance membranes for the feed flow rates at 5.5-22 kg h(-1) with the Reynolds number of 5000-20,000. (c) 2008 Elsevier B.V. All rights reserved.