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Furans are high value-added biomass-derived chemicals that can be used to replace petrochemicals. In this study, sulfated solid acid catalysts were prepared by precipitation and impregnation and were used for the conversion of a cellulosic pulp sheet into furans. The physicochemical properties of the prepared sulfated solid acid with different calcination temperatures and different mol ratios of Ti-Al were characterized using XRD, elemental analysis, TG, and NH 3 -TPD. Furthermore, the effects of various processing parameters such as temperature, time, and catalyst dosage on the reaction performance were studied. The combined yield of 5-hydroxymethyl-furfural and furfural reached 8.9% and 4.5% of pulp sheet mass with a 5% dosage of SO 4 2-/TiO 2 -Al 2 O 3 catalyst at 220 o C for 30 min. The activity for recovered catalyst was also investigated in this study.

Microbial production of 1,2‐propanediol (1,2‐PD) and 1,3‐propanediol (1,3‐PD) is one of the fast developing processes of Bio‐Refinery, attracting the continuous attention all over the world. The following sections describe the details of the microbial production methods including the microorganisms used for production, biosynthesis routes, production capacity, culture conditions, application of metabolic engineering and downstream technology for the fermentation liguors. And the new development of microbial production is given in the article.

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