磺化型Nb-MCM-41催化剂的合成及其木聚糖水解反应性能
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摘要
采用微波辅助水热法制备了磺化型Nb-MCM-41固体酸催化剂,并考察其木聚糖水解反应的催化性能。利用X射线衍射、傅里叶红外光谱和扫描电镜等对固体酸催化剂物化性质及形貌结构进行了表征。结果表明,Nb-MCM-41-Pr-SO_3H催化剂对木聚糖水解反应具有较高的催化活性和稳定性;在木聚糖与催化剂的质量比为2、190℃、氮气5 MPa条件下反应2 h,木聚糖的转化率为95.1%,糠醛产率为37.5%。该研究结果有助于构建设计生物质催化转化高效催化体系。
The sulfonated Nb-MCM-41 solid acid catalyst was synthesized by microwave-assisted hydrothermal method, and its catalytic performance in hydrolysis of xylan was investigated. The physicochemical properties of the as-prepared solid acid catalyst were characterized by XRD, FT-IR and SEM. The results showed that Nb-MCM-41-Pr-SO_3H catalyst possessed excellent and stable activity in hydrolysis of xylan. Under the conditions of 2 mass ratio of xylan to catalyst, 190 ℃, 5 MPa N_2 for 2 h, the conversion of xylan was 95.1% and the yield of furfural was 37.5%. The result might provide insight on the fabrication of efficient catalysts for biomass conversion.
The sulfonated Nb-MCM-41 solid acid catalyst was synthesized by microwave-assisted hydrothermal method, and its catalytic performance in hydrolysis of xylan was investigated. The physicochemical properties of the as-prepared solid acid catalyst were characterized by XRD, FT-IR and SEM. The results showed that Nb-MCM-41-Pr-SO_3H catalyst possessed excellent and stable activity in hydrolysis of xylan. Under the conditions of 2 mass ratio of xylan to catalyst, 190 ℃, 5 MPa N_2 for 2 h, the conversion of xylan was 95.1% and the yield of furfural was 37.5%. The result might provide insight on the fabrication of efficient catalysts for biomass conversion.
引文
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[3] GARCíASANCHO C,AGIRREZABALTELLERIA I,GüEMEZ M B,et al.Dehydration of d-xylose to furfural using different supported niobia catalysts[J].Applied Catalysis B Environmental,2014,152/153(25):1-10.
[4] BHAUMIK P,DHEPE P L.Effects of careful designing of SAPO-44 catalysts on the efficient synthesis of furfural[J].Catalysis Today,2015,251:66-72.
[5] 李圭,钟玲,袁霞,等.Sn掺杂MCM-41介孔分子筛的制备、表征及催化性能研究[J].无机材料学报,2010,25(10):1041-1046.
[6] XIE W L,ZHANG C.Propylsulfonic and arenesulfonic functionalized SBA-15 silica as an efficient and reusable catalyst for the acidolysis of soybean oil with medium-chain fatty acids[J].Food Chemistry,2016,211:74-82.
[7] WU C F,WANG L Z,WILLIAMS P T,et al.Hydrogen production from biomass gasification with Ni/MCM-41 catalysts:influence of Ni content[J].Applied Catalysis B Environmental,2011,108/109:6-13.
[8] OSAZE O,HUONG T D,CHINH N,et al.Syngas production from methane dry reforming over Ni/SBA-15 catalyst:effect of operating parameters[J].International Journal of Hydrogen Energy,2017,42:11283-11294.
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[10] WANG W J,REN J L,LI H L,et al.Direct transformation of xylan-type hemicelluloses to furfural via SnCl4 catalysts in aqueous and biphasic systems[J].Bioresource Technology,2015,183:188-194.