Efficient Sorbitol Producing Process through Glucose Hydrogenation Catalyzed by Ru Supported Amino Poly (Styrene-co-Maleic) Polymer (ASMA) Encapsulated on γ-Al2O3

Abstract

In this work, a core-shell-like sphere ruthenium catalyst, named as 5%Ru/γ-Al2O3@ASMA, has been successfully synthesized through impregnating the ruthenium nanoparticles (NPs) on the surface of the amino poly (styrene-co-maleic) polymer (ASMA) encapsulating γ-Al2O3 pellet support. The interaction between the Ru cations and the electro-donating polymer shell rich in hydroxyl and amino groups through the coordination bond would guarantee that the Ru NPs can be highly dispersed and firmly embedded on the surface of the support. In addition, the solid sphere γ-Al2O3 pellet could serve as the core to support the resulted catalysts applied in the flow process in a trickle bed reactor to promote the productivity. The resulted catalyst 5%Ru/γ-Al2O3@ASMA can be applied efficiently in the glucose hydrogenation and presents a steadfast sorbitol yield of almost 90% both in batch reactor and the trickle bed reactor, indicating the potential feasibility of the core-shell-like catalyst in the efficient production of sorbitol.

Hydrogenation of Sugars to Sugar Alcohols in the Presence of a Recyclable Ru/Al2O3 Catalyst Commercially Available

“…In order to prevent the deactivation of a Ru/ Al 2 O 3 catalyst, a newly synthesized core−shell-like sphere ruthenium catalyst, named 5%Ru/γ-Al 2 O 3 @ASMA, ruthenium nanoparticles (NPs) supported on an amino poly(styrene-comaleic) polymer (ASMA) encapsulating γ-Al 2 O 3 pellet support was found to be stable and 95% yield of sorbitol was obtained under 50 bar of hydrogen at 120 °C for 2 h of reaction. 42 The stability of the catalyst was due to the encapsulation of γ-Al 2 O 3 by a polymer. On the basis of these studies, the Ru/Al 2 O 3 catalyst suffers from a lack of stability and leads to a selectivity lower than 70%.…”

“…In another study the hydrogenation of an aqueous solution of glucose in an autoclave at 120 °C and at a high hydrogen pressure of 120 bar in the presence of a Ru/Al 2 O 3 catalyst led to a selectivity of sorbitol lower than 70% (60–65%) due also to poisoning of the active sites. In order to prevent the deactivation of a Ru/Al 2 O 3 catalyst, a newly synthesized core–shell-like sphere ruthenium catalyst, named 5%Ru/γ-Al 2 O 3 @ASMA, ruthenium nanoparticles (NPs) supported on an amino poly­(styrene- co -maleic) polymer (ASMA) encapsulating γ-Al 2 O 3 pellet support was found to be stable and 95% yield of sorbitol was obtained under 50 bar of hydrogen at 120 °C for 2 h of reaction . The stability of the catalyst was due to the encapsulation of γ-Al 2 O 3 by a polymer.…”

Efficient Catalytic Hydrogenation of Glucose to Sorbitol over Metallic Nickel-Rich Nickel Borides under Mild Reaction Conditions

“…After optimization, the developed NiBO-10KH 2 PO 4 catalyst can efficiently convert glucose to sorbitol with almost quantitative yield under very mild reaction conditions (80 °C and 1 MPa of H 2 ). More importantly, in comparison with previous works, ,,− the NiBO-10KH 2 PO 4 catalyst avoids the use of high H 2 pressure (3–5 MPa) and high reaction temperature (120–160 °C) while providing good sorbitol yield with a short reaction time (Table S1).…”

Continuous Hydrogenation of Maltose over Raney Ni in a Trickle-Bed Reactor

“…The reaction temperature is critical to attaining optimum catalytic performance in sugar hydrogenation, and inappropriate thermal conditions would deteriorate the selectivity toward the corresponding sugar alcohols. 39 The effects of temperature in the range of 100−160 °C on continuous maltose hydrogenation were systematically studied, as shown in Figure 3. It is evidenced that the steady state could be achieved after 90 min on stream (Figure 3a).…”