TY - JOUR
T1 - Fabrication of bilayer catalytic composite membrane PVA-SA/SPVA and application for ethyl acetate synthesis
AU - Bo, Shutong
AU - Zhang, Li
AU - Han, Shang
AU - Li, Yuewen
AU - Li, Weixing
AU - Xing, Weihong
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - In this study, a dual-function catalytic composite membrane (CCM) was developed by coating a sulfonated-polyvinyl alcohol (SPVA) casting solution onto a polyvinyl alcohol (PVA)-sodium alginate (SA) membrane. SPVA was synthesized via sulfoisophthalic acid (SIPA) cross-linked PVA. The membranes were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), scanning electron microscopy (SEM), pervaporation and pervaporation coupled esterification experiments, etc. The dehydration of ethanol via pervaporation was studied over the concentration range of 3.5–11 wt% water in ethanol. The conversions of acetic acid in a batch reactor (BR) with CCM, pervaporation catalytic membrane reactor (PVCMR) with CCM and BR with free SIPA were compared. The experimental results showed that the conversion reached 96% in 12 h at 75 °C with 20% molar fraction of catalyst, an initial molar ratio (alcohol/acid) of 2:1 and an S/m ratio of 1.13 cm2 g-1 in PVCMR. With these conditions, the conversion was enhanced significantly by approximately 24% compared to BR. After five successive runs, the membrane still maintained outstanding stability.
AB - In this study, a dual-function catalytic composite membrane (CCM) was developed by coating a sulfonated-polyvinyl alcohol (SPVA) casting solution onto a polyvinyl alcohol (PVA)-sodium alginate (SA) membrane. SPVA was synthesized via sulfoisophthalic acid (SIPA) cross-linked PVA. The membranes were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), scanning electron microscopy (SEM), pervaporation and pervaporation coupled esterification experiments, etc. The dehydration of ethanol via pervaporation was studied over the concentration range of 3.5–11 wt% water in ethanol. The conversions of acetic acid in a batch reactor (BR) with CCM, pervaporation catalytic membrane reactor (PVCMR) with CCM and BR with free SIPA were compared. The experimental results showed that the conversion reached 96% in 12 h at 75 °C with 20% molar fraction of catalyst, an initial molar ratio (alcohol/acid) of 2:1 and an S/m ratio of 1.13 cm2 g-1 in PVCMR. With these conditions, the conversion was enhanced significantly by approximately 24% compared to BR. After five successive runs, the membrane still maintained outstanding stability.
KW - Catalytic composite membrane
KW - Cross-linking modification
KW - Esterification
KW - Membrane reactor
KW - Sulfoisophthalic acid
UR - http://www.scopus.com/inward/record.url?scp=85047629551&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2018.05.047
DO - 10.1016/j.memsci.2018.05.047
M3 - 文章
AN - SCOPUS:85047629551
SN - 0376-7388
VL - 563
SP - 10
EP - 21
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -