Influence of Ni crystallite size on deoxygenation of methyl laurate to hydrocarbons over Ni/SiO<sub>2</sub> catalyst

HAN Meng-meng; DAI Ji-cai; CHEN Ji-xiang

Volume 42 Issue 08

Aug. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(08): 965-972

HAN Meng-meng, DAI Ji-cai, CHEN Ji-xiang. Influence of Ni crystallite size on deoxygenation of methyl laurate to hydrocarbons over Ni/SiO2 catalyst[J]. Journal of Fuel Chemistry and Technology, 2014, 42(08): 965-972.

Citation:

HAN Meng-meng, DAI Ji-cai, CHEN Ji-xiang. Influence of Ni crystallite size on deoxygenation of methyl laurate to hydrocarbons over Ni/SiO₂ catalyst[J]. Journal of Fuel Chemistry and Technology, 2014, 42(08): 965-972.

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Influence of Ni crystallite size on deoxygenation of methyl laurate to hydrocarbons over Ni/SiO₂ catalyst

1.
Tianjin Key Laboratory of Applied Catalysis Science and Technology, Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2.
Hebei Botou Vocational College, Botou 062150, China

Received Date: 2014-01-10
Rev Recd Date: 2014-05-01
Publish Date: 2014-08-30

Abstract

Abstract

Three Ni/SiO₂ catalysts with different Ni crystallite sizes were prepared by the incipient wetness impregnation-drying-reduction and incipient wetness impregnation-drying-calcination-reduction methods. The catalysts were characterized by H₂-TPR, XRD, TEM, H₂ chemisorption, NH₃-TPD and TGA techniques. Their catalytic performances in the deoxygenation of methyl laurate to undecane (C₁₁) and dodecane (C₁₂) were evaluated in a fixed bed reactor. The effects of Ni crystallite size on the catalyst structure and performance were investigated. It was found that the impregnation-drying-reduction method gave smaller Ni crystallite size, and the high reduction temperature promoted the growth of Ni crystallite. With the increase of the Ni crystallite size, the turnover frequency of methyl laurate increased, while the total selectivity to C₁₁ and C₁₂ (s_C₁1+C₁₂), C₁₁/C₁₂ mol ratio and the selectivity to cracking products decreased. We suggest that the deoxygenation of methyl laurate on Ni/SiO₂ is structurally sensitive. The effects of weight hourly space velocity (WHSV) on performance of Ni/SiO₂ were also investigated. As WHSV increased, the methyl laruate conversion, s_C₁1+C₁₂, C₁₁/C₁₂ mol ratio and the selectivity to cracking products decreased. In addition, CO and CO₂ generated from the decarbonylation/decarboxylation pathway were converted to CH₄, indicating that Ni/SiO₂ had high activity for methanation. It was also found that the sintering of small Ni crystallites, the adsorption of organic compounds and carbon deposit led to catalyst deactivation.
- Ni crystallite size,
- methyl laurate,
- hydrodeoxygenation,
- decarbonylation/decarboxylation,
- structure sensitivity

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References

谭天伟, 王芳, 邓立, 徐家立, 王丽娟. 生物柴油的生产和应用[J]. 现代化工, 2002, 22(2): 4-6. (TAN Tian-wei, WANG Fang, DENG Li, XU Jia-li, WANG Li-juan. Production and application of biodiesel[J]. Modern Chemical Industry, 2002, 22(2): 4-6.)

左华亮, 刘琪英, 王铁军, 史娜, 刘建国, 马隆龙. 负载的Ni催化剂上植物油脂加氢脱氧制备第二代生物柴油[J]. 燃料化学学报, 2012, 40(9): 1067-1073. (ZUO Hua-liang, LIU Qi-ying, WANG Tie-jun, SHI Na, LIU Jian-guo, MA Long-long. Catalytic hydrodeoxygenation of vegetable oil over Ni catalysts to produce second-generation biodiesel[J]. Journal of Fuel Chemistry and Technology, 2012, 40(9): 1067-1073.)

SHARMA Y C, SINGH B, UPADHYAY S N. Advancements in development and characterization of biodiesel: A review[J]. Fuel, 2008, 87(12): 2355-2373.

MARCHETTI J M, MIGUEL V U, ERRAZU A F. Possible methods for biodiesel production[J]. Renew Sus Energy Rev, 2007, 11(6): 1300-1311.

MORGAN T, GRUBB D, SANTILLAN-JIMENEZ E, CROCKER M. Conversion of triglycerides to hydrocarbons over supported metal catalysts[J]. Top Catal, 2010, 53(11/12): 820-829.

LESTARI S, SIMAKOVA I, TOKAREV A, MÄKI-ARVELA P, ERÄNEN K, MURZIN D Y. Synthesis of biodiesel via deoxygenation of stearic acid over supported Pd/C catalyst[J]. Catal Lett, 2008, 122(3/4): 247-251.

LESTARI S, MÄKI-ARVELA P, ERÄNEN K, BELTRAMINI J, LU G Q M, MURZIN D Y. Diesel-like hydrocarbons from catalytic deoxygenation of stearic acid over supported Pd nanoparticles on SBA-15 catalysts[J]. Catal Lett, 2010, 134(3/4): 250-257.

SENOL O I, RYYMIN E M, VILJAVA T R, KRAUSE A O I. Reactions of methyl heptanoate hydrodeoxygenation on sulphided catalysts[J]. J Mol Catal A: Chem, 2007, 268(1/2): 1-8.

ZUO H L, LIU Q Y, WANG T J, MA L L, ZHANG Q, ZHANG Q. Hydrodeoxygenation of methyl palmitate over supported Ni catalysts for diesel-like fuel production[J]. Energy Fuels, 2012, 26(6): 3747-3755.

PENG B X, YUAN X G, ZHAO C, LERCHER J A. Stabilizing catalytic pathways via redundancy: selective reduction of microalgae oil to alkanes[J]. J Am Chem Soc, 2012, 134(22): 9400-9405.

SNÅRE M, KUBICKOVÁ I, MÄKI-ARVELA P, ERÄNEN K, MURZIN D Y. Heterogeneous catalytic deoxygenation of stearic acid for production of biodiesel[J]. Ind Eng Chem Res, 2006, 45(16): 5708-5715.

SONG W J, CHEN Z, LERCHER J A. Importance of size and distribution of Ni nanoparticles for the hydrodeoxygenation of microalgae oil[J]. Chem Eur J, 2013, 19(30): 9833-9842.

LOUIS C, CHENG Z-X, CHE M. Characterization of Ni/SiO₂ catalysts during impregnation and further thermal activation treatment leading to metal particles[J]. J Phys Chem, 1993, 97(21): 5703-5712.

LI K L, WANG R J, CHEN J X. Hydrodeoxygenation of anisole over silica-supported Ni₂P, MoP, and NiMoP catalysts[J]. Energy Fuels, 2011, 25(3): 854-863.

CLAUSE O, BONNEVIOT L, CHE M. Effect of the preparation method on the thermal stability of silica-supported nickel oxide as studied by EXAFS and TPR techniques[J]. J Catal, 1992, 138(1): 195-205.

RODRIGUEZ J A, HANSON J C, FRENKEL A I, KIM J Y, PREZ M. Experimental and theoretical studies on the reaction of H₂ with NiO: Role of O vacancies and mechanism for oxide reduction[J]. J Am Chem Soc, 2002, 124(2): 346-354.

FURSTENAU R P, MCDOUGALL G, LANGELL M A. Initial stages of hydrogen reduction of NiO(100)[J]. Surf Sci, 1985, 150(1): 55-79.

HADJⅡVANOV K, MIHAYLOV M, KLISSURSKI D, STEFANOV P, ABADJIEVA N, VASSILEVA E, MINTCHEV L. Characterization of Ni/SiO₂ catalysts prepared by successive deposition and reduction of Ni²⁺ ions[J]. J Catal, 1999, 185(2): 314-323.

FANG K G, REN J, SUN Y H. Effect of nickel precursors on the performance of Ni/AlMCM-41 catalysts for n-dodecane hydroconversion[J]. J Mol Catal A: Chem, 2005, 229 (1/2): 51-58.

刘旭光. 二氧化硅负载镍或磷化镍催化氯苯气相加氢脱氯的研究[D]. 天津: 天津大学, 2007. (LIU Xu-guang. Study on catalytic hydrodechlorination of chlorobenzen in gas phase over silica supported nickel or nickel phosphide catalysts[D]. Tianjin: Tianjin University, 2007.)

YANG Y, CHEN J X, SHI H. Deoxygenation of methyl laurate as a model compound to hydrocarbons on Ni₂P/SiO₂, Ni₂P/MCM-41, and Ni₂P/SBA-15 catalysts with different dispersions[J]. Energy Fuels, 2013, 27(6): 3400-3409.

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