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Selective conversion of lignocellulosic biomass into furan compounds using bimetal-modified bio-based activated carbon: Analytical Py-GC×GC/MS
Journal of the Energy Institute ( IF 5.7 ) Pub Date : 2020-07-27 , DOI: 10.1016/j.joei.2020.07.010
Yi Lu , Yunwu Zheng , Rui He , Wenbin Li , Zhifeng Zheng

Bio-based activated carbon supported Cu, Al, Sn and their bimetals were devised to serve as solid acid catalysts for the pyrolysis of xylan to generate furan compounds, and their catalytic activity was evaluated by Py-GC × GC/MS. The Cu–Al/C catalysts with diverse Cu to Al ratios exhibited better performance in enhancing the content and selectivity of 2-MF compared with other catalysts. Among the series of Cu–Al/C catalysts, 4Cu–2Al/C achieved a content of furan compounds as high as 80.6%, and 2-MF, FF and furan were the major furan products with selectivity values of 44.0%, 30.0% and 15.8%, respectively. Furthermore, the catalyst also worked well in promoting the pyrolysis of xylose, glucose, cellulose and pine to produce furans, and the highest and lowest contents of furans were obtained from glucose (87.8%) and pine (70.1%), respectively. These results suggest the 4Cu–2Al/C obviously promotes the formation of furans, which is comparable to those of recently reported solid acid catalysts. Characterization with XRD, XPS, NH3-TPD, N2 adsorption-desorption, and SEM, demonstrated that the effective interactions between Cu species and Al species facilitated the dehydration of saccharides and the dehydrogenation of cyclopentanones to increase furan compounds. Al species, mainly Al2O3 were the major contributor to the Lewis acid sites, and Cu specie played an essential role in regulating the acidity and enhancing the selectivity of 2-MF. In addition to furans, 4Cu–2Al/C was found to have positive effects on hindering the formation of acids in the pyrolysis products.



中文翻译:

使用双金属修饰的生物基活性炭将木质纤维素生物质选择性转化为呋喃化合物:分析型Py-GC×GC / MS

设计了生物基活性炭负载的Cu,Al,Sn及其双金属,用作木聚糖热解生成呋喃化合物的固体酸催化剂,并通过Py-GC×GC / MS对其催化活性进行了评估。与其他催化剂相比,具有不同的铜铝比的Cu-Al / C催化剂在提高2-MF的含量和选择性方面表现出更好的性能。在一系列的Cu-Al / C催化剂中,4Cu-2Al / C的呋喃化合物含量高达80.6%,2-MF,FF和呋喃是主要的呋喃产物,其选择性分别为44.0%,30.0%和15.8%。此外,该催化剂在促进木糖,葡萄糖,纤维素和松木的热解以产生呋喃方面也发挥了良好的作用,呋喃含量的最高和最低分别来自葡萄糖(87.8%)和松木(70.1%)。这些结果表明4Cu-2Al / C明显促进了呋喃的形成,这与最近报道的固体酸催化剂相当。用XRD,XPS,NH进行表征3- TPD,N 2吸附-解吸和SEM表明,Cu和Al之间的有效相互作用促进了糖类的脱水和环戊酮的脱氢,从而增加了呋喃化合物。Al物种(主要为Al 2 O 3)是路易斯酸位的主要贡献者,Cu物种在调节酸度和增强2-MF的选择性方面起着至关重要的作用。除了呋喃,还发现4Cu-2Al / C对阻止热解产物中酸的形成有积极作用。

更新日期:2020-07-27
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