化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (12) : 206-209.

科学研究

纳米片状固体碱氧化物的制备及其催化性能研究

^1,2

作者信息 +

Preparation and catalytic property of nano-scale solid base oxide

Han Hongjing^1,2, Li Jinxin^1,2, Yu Jiameng^1,2, Wang Haiying^1,2,Zhang Yanan^1,2, Chen Yanguang^1,2

Author information +

文章历史 +

Received		Published
2018-07-10		2019-12-20
Issue Date	Revised Date
2020-01-03	2018-07-10

PDF (2543K)

摘要

采用水热合成法制备了一系列镧掺杂镁铝水滑石(LaMgAl-LDHs)前体,并通过焙烧制备了镧镁铝固体碱氧化物(LaMgAlO_x)催化剂。通过X射线衍射(XRD)、扫描电子显微镜(SEM)、热重分析仪(TG)对前体及催化剂的晶型、形貌及热稳定性进行了表征,并在乙醇-水溶剂体系中对其催化解聚木质素磺酸钙(CLS)性能进行了评价,采用气相色谱-质谱联用仪(GC-MS)对CLS催化解聚的液相产物进行定性和定量分析。结果表明,制得的LaMgAlO_x具有立方晶相,形貌为片状结构,粒径大小100～200nm,在La掺杂量为15%(wt,质量分数)条件下,在催化解聚过程中,液体产物收率达到46.26%,酚类化合物选择性为60.80%,反应后的LaMgAlO_x经氧化再生后,仍然具有较高的催化活性和结构稳定性。

Abstract

La doped MgAl hydrotalcites (LaMgAl-LDHs) were prepared by hydrothermal method.The solid base oxide (LaMgAlO_x) catalysts were obtained by calcining the hydrotalcite.The crystal structure,apparent morphology and thermogravimetric of the hydrotalcite and catalysts were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and thermal analysis (TG).Catalytic performance for producing aromatic compound from calcium lignosulfonate (CLS) via catalysis was evaluated in ethanol-water solvent system.The liquid phase products of CLS catalytic depolymerization were analyzed by gas chromatography-mass spectrometry (GC-MS).The results showed that the LaMgAlO_x was cubic crystal phase,the morphology was flake,and the grain size was 100-200nm.When the La doped 15wt%,the yield of liquid products was 46.26%,the phenolic compounds selectivities were 60.80%.The LaMgAlO_x catalyst was regenerated by oxidation to removing the coke coated on the surface and exhibited the better catalytic activity and the high structural stability.

关键词

镧掺杂 / 固体碱氧化物 / 木质素磺酸钙 / 催化解聚 / 酚类化合物

Key words

La doping / solid base oxide / calcium lignosulfonate / catalytic depolymerization / phenolic compound

引用本文

引用格式 ▾

纳米片状固体碱氧化物的制备及其催化性能研究[J]. 化工新型材料, 2019, 47(12): 206-209 DOI:

登录浏览全文

4963

注册一个新账户忘记密码

参考文献

原文顺序 | 出版日期 | 本文引用

[1] Mansouri N E E,Salvadó J.Analytical methods for determining functional groups in various technical lignins[J].Industrial Crops & Products,2007,26(2):116-124.
[2] 李计彪,武书彬,徐绍华.木质素磺酸盐的化学结构与热解特性[J].林产化学与工业,2014,34(2):23-28.
[3] Kang Shimin,Li Xianglan,Fan Juan,et al.Hydrothermal conversion of lignin:a review[J].Renewable and Sustainable Energy Reviews,2013(27):546-558.
[4] Wen D,Jiang H,Zhang K.Supercritical fluids technology for clean biofuel production[J].Progress in Natural Science(Materials International),2009,19(3):273-284.
[5] Rahimi A,Ulbrich A,Coon J J,et al.Formic-acid-induced depolymerization of oxidized lignin to aromatics[J].Nature,2014,515(7526):249-252.
[6] Deepa A K,Dhepe Paresh L.Solid acid catalyzed depolymerization of lignin into value added aromatic monomers[J].RSC Advances,2014,4(25):12625-12629.
[7] Kim J Y,Oh S,Hwang H,et al.Effects of various reaction parameters on solvolytical depolymerization of lignin in sub- and supercritical ethanol[J].Chemosphere,2013,93(9):1755-1764.
[8] Huang X,Korányi T I,Boot M D,et al.Catalytic depolymerization of lignin in supercritical ethanol[J].Chemsuschem,2014,7(8):2276-2288.
[9] 覃志强,高文桂,王华,等.稀土助剂Pr改性Cu/Zn/ZrO₂合成甲醇催化剂的催化性能[J].化工进展,2013,32(4):820-823.
[10] Lin M G,Yang C,Wu G S,et al.Structure and catalytic performance of Mn-and La-modified Cu/ZrO₂ catalysts for methanol synthesis[J].Chinese Journal of Catalysis,2004,25(7):591-595.
[11] 王青青,包桂蓉,马依文,等.La改性Cu-Mn-Al催化剂超临界甲醇中催化木质素液化性能研究[J].材料导报,2016,30(14):44-48.
[12] Liao Y,Li F,Dai X,et al.Solid base catalysts derived from Ca-M-Al (M=Mg,La,Ce,Y) layered double hydroxides for dimethyl carbonate synthesis by transesterification of methanol with propylene carbonate[J].Chinese Journal of Catalysis,2017,38(11):1860-1869.
[13] Warner G,Hansen T S,Riisager A,et al.Depolymerization of organosolv lignin using doped porous metal oxides in supercritical methanol[J].Bioresource Technology,2014,161:78-83.