TY - JOUR
T1 - Controllable acid/base propriety of sulfate modified mixed metal oxide derived from hydrotalcite for synthesis of propylene carbonate
AU - Ding, Zhongxie
AU - Xu, Wenlong
AU - Zhang, Xingguang
AU - Liu, Zhen
AU - Shen, Jiecan
AU - Liang, Jinhua
AU - Jiang, Min
AU - Ren, Xiaoqian
N1 - Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2019/5
Y1 - 2019/5
N2 - Ammonium persulfate modified mixed metal oxide derived from hydrotalcite with tunable acid/base properties can be prepared via thermal decomposition of Mg-Al hydrotalcite-type precursors and ammonium persulfate. By controlling the ammonium persulfate content, these sulphur mutated samples, denoted as SMgAlO-y (y = 1; 3; 5; 7), were investigated in this research. The resulted materials were characterized by XRD, SEM, FT-IR spectra, Py-IR spectra, XPS, Hammett indicator, CO2-TPD, as well as NH3-TPD. Furthermore, the acid-base property of the sample surface was determined by inverse gas chromatography measurements (IGC). Among all the obtained outcomes, the target SMgAlO-5 demonstrated the maximal Ka /Kb value, and it presented the highest activity as a catalyst in the synthesis of propylene carbonate (PC) through 1,2-propylene glycol and urea, giving the yield of 97.2% at the optimized reaction condition, which indicated that the PC yield counted on the synergic effect of the acidity and basicity on catalysts.
AB - Ammonium persulfate modified mixed metal oxide derived from hydrotalcite with tunable acid/base properties can be prepared via thermal decomposition of Mg-Al hydrotalcite-type precursors and ammonium persulfate. By controlling the ammonium persulfate content, these sulphur mutated samples, denoted as SMgAlO-y (y = 1; 3; 5; 7), were investigated in this research. The resulted materials were characterized by XRD, SEM, FT-IR spectra, Py-IR spectra, XPS, Hammett indicator, CO2-TPD, as well as NH3-TPD. Furthermore, the acid-base property of the sample surface was determined by inverse gas chromatography measurements (IGC). Among all the obtained outcomes, the target SMgAlO-5 demonstrated the maximal Ka /Kb value, and it presented the highest activity as a catalyst in the synthesis of propylene carbonate (PC) through 1,2-propylene glycol and urea, giving the yield of 97.2% at the optimized reaction condition, which indicated that the PC yield counted on the synergic effect of the acidity and basicity on catalysts.
KW - Ammonium persulfate
KW - Cooperative effect
KW - Mg-Al metal oxide
KW - Propylene carbonate
KW - Urea alcoholysis
UR - http://www.scopus.com/inward/record.url?scp=85066744893&partnerID=8YFLogxK
U2 - 10.3390/catal9050470
DO - 10.3390/catal9050470
M3 - 文章
AN - SCOPUS:85066744893
SN - 2073-4344
VL - 9
JO - Catalysts
JF - Catalysts
IS - 5
M1 - 470
ER -