Synthesis, Characterization, and Biofuel Application of Mesoporous Zirconium Oxophosphates

被引:114
|
作者
Das, Swapan K. [1 ]
Bhunia, Manas K. [1 ]
Sinha, Anil K. [2 ]
Bhaumik, Asim [1 ]
机构
[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India
[2] Indian Inst Petr, Catalyt Convers & Proc Dev Div, Dehra Dun 248005, Uttar Pradesh, India
来源
ACS CATALYSIS | 2011年 / 1卷 / 05期
关键词
mesoporous; zirconium oxophosphate; biodiesel; fatty acid; esterification; CATALYZED BIODIESEL PRODUCTION; SOLID ACID; MOLECULAR-SIEVES; ACETIC-ACID; PHOSPHATE; ESTERIFICATION; TRANSESTERIFICATION; ZEOLITES; EXCHANGE; FILMS;
D O I
10.1021/cs200005z
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Mesoporous zirconium oxophosphates have been synthesized through the evaporation-induced self-assembly (EISA) method in the presence of an amphiphilic block copolymer, pluronic. F127 as template under strongly acidic conditions. The mesophases of the materials were analyzed by using small-angle powder X-ray diffractions and transmission electron microscopic (TEM) image analysis. N-2 adsorption-desorption studies showed high surface area (260-312 m(2) g(-1)) and narrow pore size distribution (4.5-5.5 nm) for the materials. NH3-TPD and pyridine-IR analyses suggested the presence of strong Lewis and Bronsted acid sites. These mesoporous materials showed excellent catalytic activity in biodiesel reaction for the effective conversion of the long chain fatty acids to their respective methyl esters. The maximum biodiesel yield was about 91% under optimal reaction conditions. High catalytic activity could be attributed to the large surface area and the presence of large number of acidic sites located at the surface of the materials. The catalysts showed negligible loss of activity after five repetitive cycles.
引用
收藏
页码:493 / 501
页数:9
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