Recommanded Product: 931-40-8. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, is researched, Molecular C4H6O4, CAS is 931-40-8, about Lanthanum nanocluster/ZIF-8 for boosting catalytic CO2/glycerol conversion using MgCO3 as a dehydrating agent. Author is Hu, Chechia; Chang, Chien-Wei; Yoshida, Masaaki; Wang, Ke-Hsuan.
A lanthanum-modified zeolitic imidazolate framework (La/ZIF-8) was developed to produce glycerol carbonate using CO2 and glycerol as raw materials. La/ZIF-8 provides a high catalytic glycerol conversion efficiency owing to its surface-attached nanoclusters of La2O3, which can be viewed as La3+-O2- pairs that strengthen the Lewis basicity and acidity, and the large sp. surface area of ZIF-8. The catalytic glycerol conversion and the yield of glycerol carbonate were 46.5% and 35.3%, resp., using CH3CN as a dehydrating agent. With increase in the amount of CH3CN, the water mols. could react with CH3CN to reduce the selectivity. When an inorganic dehydrating agent, MgCO3, was used to phys. adsorb and remove water mols. in the reaction, the selectivity of the reaction could be increased to over 95%, which is the highest ever reported. Reaction kinetics anal. also revealed that the activation energy of using MgCO3 (5.4 kJ mol-1) as a dehydrating agent is lower than that using CH3CN (7.8 kJ mol-1). Moreover, the La/ZIF-8 could be recycled and reused at least three times with high catalytic performance. This study provides an effective material with dual Lewis basicity and acidity for CO2/glycerol conversion and significantly improves the catalytic performance using an inorganic dehydrating agent.
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