Abstract
The separation of a mixture of C5–C9 n-paraffins was achieved by Inverse Gas Chromatography (IGC) by using boehmite; AlO(OH), in a packed column with short exposure times and temperatures; from 45 °C to 52 °C. The boehmite was characterized by XRD; ATG; SEM; IR spectroscopy and N2 adsorption. The material exhibited a low crystalline boehmite (AlOOH) structure and presented high hydration (pseudoboehmite). The reverse gas chromatography measurements showed that the elution temperatures of the C5–C9 n-paraffins were low compared with those obtained for other adsorbents. The differential heat of adsorption values ensures the satisfactory separation of the components in the C5–C9 mixture under suitable chromatographic conditions.
Highlights
Bohemite [AlO(OH)] is an aluminum oxy-hydroxide present naturally in the bauxite ores, along with diaspore (AlOOH) and gibbsite [Al(OH)3 ]
N?carbon atoms pattern of boehmite were assigned to an orthorhombic structure of ɣ-AlO(OH) and the vibrations of other adsorbents, the separation was possible at lower temperatures
N2 adsorption adsorbents, but2the differences between them were sufficient to ensure the separation of the n-C5 to and surface area
Summary
Bohemite [AlO(OH)] is an aluminum oxy-hydroxide present naturally in the bauxite ores, along with diaspore (AlOOH) and gibbsite [Al(OH)3 ]. One of the most important applications of the boehmite is as precursor to obtain γ–Al2 O3. Γ–Al2 O3 nd η–Al2 O3 are important as catalyst supports, due to their highly effective contact area, high thermal stability, and surface acidity susceptible to be controlled. It is possible to obtain the pseudoboehmite (PB) synthetically depending on the characteristics of the synthesis method employed. It has been reported the synthesis by a sol-gel method with and without catalyst [7], the atrane method [8] and low-cost approaches to synthesize PB with high surface area and broad pore size distribution. Previous reports have been focused on acid neutralization by using sodium aluminate as Al source [9], the hydrolysis of aluminum alkoxides [10] and a modified cation–anion double hydrolysis method by using water glass as the pore-expanding agent
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
