3D Hollow Mg-Ca-Al Hydrotalcite-Like Compounds Doped with KF for Catalytic Transesterification

Abstract

Herein, a kind of three-dimensional hollow Mg-Ca-Al hydrotalcite-like compounds (HTLCs) microsphere was prepared by self-assembly of hydrotalcite-like nanosheets. Mg-Ca-Al HTLCs microsphere (MS) has large specific surface area and large pore size, and the modification of KF·2H2O increases numerous alkaline active sites on the surface of the catalyst. The prepared catalyst has excellent catalytic effect for the production of biodiesel by transesterification. Under the optimal conditions of the catalyst addition amount which accounts for 2% of the weight of oil, the biodiesel yield of the best catalyst is as high as 92% within 30 minutes. This article also provides a paradigm of a rational structural design for regulating the morphology of HTLCs.

Adsorption of mercury(II) to volcanic rock: Characteristics, equilibrium, thermodynamics, regeneration and wastewater treatment applications

“…The adsorption desorption isotherm, as can be seen in Fig. 6, was determined as a type III isotherm, or an isotherm of macro porous solid materials 29 . The average pore diameter was 92.231 nm, and the specific surface area associated with the BET technique was 1.2809 m 2 /g.…”

“…There was a variance in the target adsorbate Hg(II) absorption percentage across all studies. Following equilibrium, a centrifuge was used to separate the metal ion, and an inductively coupled plasma mass spectrometer 28,29 was used to determine the filtrate. Using Fig.…”