Efficient, Stable, and Reusable Silicoaluminophosphate for the One-Pot Production of Furfural from Hemicellulose

Abstract

Development of stable, reusable, and water-tolerant solid acid catalysts in the conversion of polysaccharides to give value-added chemicals is vital because catalysts are prone to undergo morphological changes during the reactions. With the anticipation that silicoaluminophosphate (SAPO) catalysts will have higher hydrothermal stability, those were synthesized, characterized, and employed in a one-pot conversion of hemicellulose. SAPO-44 catalyst at 170 °C within 8 h could give 63% furfural yield with 88% mass balance and showed similar activity up to at least 8 catalytic cycles. The morphological studies revealed that SAPO catalysts having hydrophilic characteristics are stable under reaction conditions.

From Lignocellulosic Biomass to Furfural: Insight into the Active Species of a Silica‐Supported Tungsten Oxide Catalyst

“…Upon working with monosaccharides, observations were made that to achieve the maximum furfural yield, a water/organic solvent biphasic system is better than only water or only organic solvent . With regard to the limited solubility of sugars and furfural in various solvents (which can form biphasic solvent systems); in a recent study, after calculating the partition coefficient and checking the miscibility of organic solvents in water, it was demonstrated that the water/toluene system yields the highest amount of furfural in a batch‐mode reaction compared to water/ p ‐xylene and water/methyl iso ‐butyl ketone (MIBK) . Although, a range of solid acids are known for the synthesis of furfural from xylose, it becomes indispensable to first obtain xylose from the hemicellulose/xylan part (polysaccharide) of naturally abundant lignocellulose .…”

The Potential of Cu‐SAPO‐44 in the Selective Catalytic Reduction of NOx with NH3

“…As observed in Table , Cu 0.1 ‐SAPO‐44 experienced a significant surface area and pore volume loss after ion‐exchange treatment. SEM images of SAPO‐44 show cubic‐like rhombohedral morphology (Figure S2, in the Supporting Information), quite similar to those in the literature . After Cu ion exchange, the morphology of Cu 0.1 ‐SAPO‐44 was nearly identical to that of the parent SAPO‐44 except for some irregular fragments, in agreement with the decrease of crystallinity as revealed by XRD (Figure ).…”

Beta zeolite: a universally applicable catalyst for the conversion of various types of saccharides into furfurals

“…Unfortunately, a very poor yield of furfural was obtained using xylan without any pretreatment, although a high yield (67%) was achieved for xylose ( Table 3, entries 6 and 7). 30 Note that they used xylan obtained from the same source as we used. The hemicellulose structure of xylan could not be decomposed under such mild conditions.…”