SAPO-34/5A Zeolite Bead Catalysts for Furan Production from Xylose and Glucose
SAPO-34/5A Zeolite Bead Catalysts for Furan Production from Xylose and Glucose
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DOI：
10.1021/acsomega.8b02461
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发表时间：
2018-11-01
期刊：
影响因子：
4.1
通讯作者：
Wettstein, Stephanie G.
中科院分区：
文献类型：
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作者：
Romo, Joelle E.;Wu, Ting;Wettstein, Stephanie G.
SAPO-34沸石晶体在沸石5A珠上生长，表征，然后用于从木糖生产糠醛和从葡萄糖生产5-羟甲基糠醛（HMF）。SAP 0 -34/5A珠状催化剂产生来自木糖的45%和来自葡萄糖的20%的中等糠醛和HMF产率（463 K; 3 h），并且比SAP 0 -34粉末催化剂更容易回收。在463 K下，SAPO-34/5A珠粒比0.02 M硫酸对生产HMF更具选择性，并且与硫酸系统不同，没有乙酰丙酸形成。当在反应之间用水洗涤或加热过夜时，SAPO-34/5A珠粒催化剂在三轮再循环后没有显著的活性损失;然而，热处理的珠粒在第二次重复使用后确实显示出热应力的迹象。SAPO-34/5A珠粒催化剂显示出分别用于从木糖和葡萄糖生产糠醛和HMF的脱水反应的前景，并且定制催化剂和载体珠粒可以导致甚至更高的选择性和产率。
SAPO-34 zeolite crystals were grown on zeolite 5A beads, characterized, and then used to produce furfural from xylose and 5-hydroxymethylfurfural (HMF) from glucose. The SAPO-34/5A bead catalysts resulted in moderate furfural and HMF yields of 45% from xylose and 20% from glucose (463 K; 3 h) and were easier to recover than the SAPO-34 powder catalyst. At 463 K, the SAPO-34/5A beads were more selective than 0.02 M sulfuric acid for producing HMF and, unlike the sulfuric acid system, no levulinic acid was formed. The SAPO-34/5A bead catalysts had no significant loss in activity after three rounds of recycle when water washed or heated overnight between reactions; however, the heat-treated beads did show signs of thermal stress after the second reuse. The SAPO-34/5A bead catalysts show promise for dehydration reactions to produce furfural and HMF from xylose and glucose, respectively, and tailoring the catalyst and the support bead could lead to even higher selectivities and yields.