Effect of Pd particle size on activity and cis-trans selectivity in partial hydrogenation of soybean oil-derived FAMEs over Pd/SiO2 catalysts

被引：25

作者：

Numwong, Natthida ^{[1
]}

Prabnasak, Panisa ^{[1
]}

Prayoonpunratn, Patsakol ^{[1
]}

Triphatthanaphong, Pholawat ^{[1
]}

Thunyaratchatanon, Chachchaya ^{[3
]}

Mochizuki, Takehisa ^{[4
]}

Chen, Shih-Yuan ^{[4
]}

Luengnaruemitchai, Apanee ^{[3
]}

Sooknoi, Tawan ^{[1
,2
]}

机构：

[1] King Mongkuts Inst Technol Ladkrabang, Dept Chem, Fac Sci, Chalongkrung Rd, Bangkok 10520, Thailand

[2] King Mongkuts Inst Technol Ladkrabang, Catalyt Chem Res Unit, Fac Sci, Chalongkrung Rd, Bangkok 10520, Thailand

[3] Chulalongkorn Univ, Petr & Petrochem Coll, Soi Chula 12,Phayathai Rd, Bangkok 10330, Thailand

[4] Natl Inst Adv Ind Sci & Technol, Energy Catalyst Technol Grp, RIEF, 16-1 Onogawa, Tsukuba, Ibaraki 3058559, Japan

来源：

FUEL PROCESSING TECHNOLOGY | 2020年 / 203卷

关键词：

Partial hydrogenation; Fatty acid methyl ester; cis-trans selectivity; Particle size; Pd/SiO2; catalyst; Oxidative stability; METHYL-ESTERS; OXIDATIVE STABILITY; PHASE HYDROGENATION; STORAGE STABILITY; BIODIESEL; NANOPARTICLES; SUPPORT; MCM-41; HYDRODEOXYGENATION; PHENYLACETYLENE;

D O I：

10.1016/j.fuproc.2020.106393

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Partial hydrogenation of soybean oil-derived fatty acid methyl esters (FAMEs) was performed to improve oxidative stability of biodiesel. The reaction was tested in a semi-batch reactor at 100 degrees C, 0.4 MPa. The effect of Pd particle size on activity and cis-trans selectivity was investigated over SiO2- and MCM-41-supported Pd catalysts, with different Pd loadings (0.5 and 1 wt.%). For Pd/SiO2 catalysts with relatively large Pd particle sizes (6.1-7.8 nm), the adsorption of polyunsaturated C18:2 and C18:3 FAMEs was promoted on the flat metal surface, providing 2- to 3-fold higher turnover frequency (TOF) compared with Pd/MCM-41 catalysts. In contrast, the Pd/MCM-41 catalysts with relatively small Pd particle sizes (2.7-4.0 nm), showed higher selectivity towards the desired monounsaturated C18:1 FAMEs due to lower affinity of isolated double bond (presented in C18:1) on the Pd surface. In addition, selectivity towards the desired cis-C18:1 FAMEs was found to be highly sensitive to Pd particle size. The 0.5Pd/MCM-41 catalyst with small Pd particle size (2.7 nm), provided high cis-C18:1 selectivity, resulting in a biodiesel with better cold flow property compared with the trans-isomers. With partial hydrogenation over the prepared Pd catalysts, biodiesel with significantly improved oxidative stability (> 10 h) could be obtained.

引用

页数：9

共 59 条

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