Sulfated Zirconia Modified SBA-15 Catalysts for Cellobiose Hydrolysis

Abstract

Zirconia modified SBA-15 becomes a very active catalyst for the selective hydrolysis of cellobiose to glucose after sulfation. Spectroscopic investigations indicate the presence of Brønsted acid sites with similar properties to those present in conventional sulfated zirconia. Indications are found that the sulfate groups attached to zirconia interact with silanol groups of SBA-15. The catalytic activity in cellobiose hydrolysis correlates well with results for temperature-programmed decomposition of i-propylamine for a range of sulfated ZrO 2 /SBA-15 catalysts. A glucose yield of 60% during cellobiose hydrolysis at a reaction time of 90 min at 160°C is obtained.

Hydrolysis of Oligosaccharides Over Solid Acid Catalysts: A Review

“…The major drawback is that the basic sites of alumina enhance glucose dehydration into HMF and decrease sugar yield. [61] The interactions between silica and zirconia create strong Brønsted acid sites useful for cellobiose hydrolysis, with a glucose yield of 60 % (Table 3, entry 11). The low surface area of sulfated zirconia can be increased by dispersing it in a SBA-15 matrix.…”

“…To avoid these issues, the use of carbon materials structured as randomly oriented sheets is a good option. [61,75] The main product of xylan hydrolysis was furfural, and only small amounts of xylose. These catalysts present a high number of acid sites (around 4-5 mmol H + g À1 for Amberlyst-15), but their stability in aqueous media is uncertain.…”

Ru supported on zirconia-modified SBA-15 for selective conversion of cellobiose to hexitols

“…by introducing various metal ions, including Al [21], Zr [22][23][24][25][26], sulfated zirconia (SZ) [27][28][29][30][31] and Zr/W mixed oxide [32,33], into SBA-15. SZ-modified SBA-15 has been reported effective in hydrolyzing cellobiose under hydrothermal conditions [34,35].…”

Chemocatalytic hydrolysis of cellulose into glucose over solid acid catalysts

“…It should be noted that SiO 2 , SBA-15 and MCM-41 are not appropriate as the catalysts for the hydrolysis of cellulose, because their intrinsic acidities are very weak even negligible. However, these materials can be modified by the introduction of SO 3 H groups or other active groups [159][160][161][162][163]. In 2010, a sulfonated silica-carbon nanocomposite (Si33C66-823-SO 3 H) was successfully developed as a solid acid catalyst for the hydrolysis of cellulose in aqueous solution, 50.4% glucose yield was achieved at 150 • C for 24 h [164].…”