Carbonized core-shell diatomite for efficient catalytic furfural production from corn cob
Carbonized core-shell diatomite for efficient catalytic furfural production from corn cob
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DOI：
10.1016/j.jclepro.2020.125410
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发表时间：
2021-02
影响因子：
11.1
通讯作者：
D. Cai;Huidong Chen;Changwei Zhang;Xingning Teng;Xiaolin Li;Zhihao Si;Guozhen Li;Shuai Yang
中科院分区：
文献类型：
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作者：
D. Cai;Huidong Chen;Changwei Zhang;Xingning Teng;Xiaolin Li;Zhihao Si;Guozhen Li;Shuai Yang
通过在DM-Sn中间体上杂化硫酸碳层，制备了一种新型核壳结构磺化锡负载型脱硫催化剂SO 42-/CX-DMSn。刘易斯酸和布朗斯特酸分别出现在DM核表面和SO 42-/CX-DMSn的包覆碳层上。该催化剂具有良好的催化活性、耐水性和稳定性。采用SEM、EDS、XRD、XPS、NH3-TPD和Py-IR等手段对催化剂表面的酸中心和碳层进行了表征。结果表明，以木糖为原料，糠醛收率为66.24%，选择性为79.92%;以玉米芯为原料，糠醛收率为65.74%，选择性为66.83%，糠醛生产中的副反应得到了很好的消除。该策略显示了新型SO 42 −/CX-DMSn材料在生物质材料有效和绿色催化生产糠醛方面的有前景的应用。
A novel core-shell sulfonated tin-loaded diatomite catalyst, namely SO42−/CX-DMSn, was synthesized by hybridizing sulfuric carbon layer on DM-Sn intermedium. Lewis and Brønsted acid sites displayed on the surface of DM core and on the coated carbon layer of the SO42−/CX-DMSn, respectively. The catalyst exhibited excellent catalytic ability, high water tolerance and good stability. The existence of acid sites and carbon layer on the diatomite were characterized by SEM, EDS, XRD, XPS, NH3-TPD and Py-IR. The unique core-shell structure of the carbonized diatomite catalyst significantly improved furfural production from xylose and lignocellulosic matrix even in organic solvent-free process. Results showed 66.24% of furfural yield and 79.92% of selectivity were obtained from xylose, whilst 65.74% of furfural yield and 66.83% of selectivity from corn cob, implying the side reactions for furfural production were well-eliminated. This strategy shows a promising application for novel SO42−/CX-DMSn material toward effective and green catalytic production of furfural from biomass materials.