(2021) Journal of Industrial and Engineering Chemistry_Natural marble powder-modified SBA-15 as an efficient catalyst for the selective production of 2-methyl-2-pentenal from n-propanal self-aldol condensation

Kannapu H.P.R., Yadagiri J., Moogi S., Kwon E.E., Lam S.S., Park Y.-K.

(Korean Society of Industrial Engineering Chemistry) Journal of Industrial and Engineering Chemistry ISSN: 1226086X Vol.94 Issue. Article No. DOI: 10.1016/j.jiec.2020.11.016

In this study, conversion of n-propanal to produce 2-methyl-2-pentenal (C6 compound, a fuel range precursor) was carried out using AMW-SBA-15 catalyst synthesized from activated marble waste (AMW) consisting mainly of Ca²⁺ and Mg²⁺ ions. AMW-SBA-15 catalysts with different weight ratios of AMW/Si (6, 12, and 18 wt. %) were prepared using single step sol-gel method. The catalytic activities were examined using a fixed bed continuous reactor over temperature ranging from 350−425 °C under atmospheric pressure. The 12AMW-SBA-15 catalysts showed superior catalytic performance with n-propanal conversion of 75 % and C-6 compound selectivity of 81 % at 375 °C without the need of deactivation for 12 h. To elucidate the structure-activity relationship, all catalysts were characterized using a variety of techniques. The superior performance of 12AMW-SBA-15 was ascribed to the high surface area and smaller particle size as well as the high hydrophobicity, which controlled the hydration of Ca²⁺/Mg²⁺ ions during the reaction. © 2020 The Korean Society of Industrial and Engineering Chemistry

The authors thank UGC, New-Delhi for sponsoring fellowship. This study was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2018R1A2B2001121). This study was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (2020R1I1A1A01073111). This research was supported by the National Research Foundation (NRF) funded by the Korea government (MSIT) (2019R1A4A1027795). The authors thank UGC, New-Delhi for sponsoring fellowship.