TY - JOUR
T1 - Continuous synthesis of menthol from citronellal and citral over Ni-beta-zeolite-sepiolite composite catalyst
AU - Simakova, Irina
AU - Mäki-Arvela, Päivi
AU - Martinez-Klimov, Mark
AU - Muller, Joseph
AU - Vajglova, Zuzana
AU - Peurla, Markus
AU - Eränen, Kari
AU - Murzin, Dmitry Yu
N1 - Funding Information:
The authors are grateful to Academy of Finland for funding through the project: Synthesis of spatially controlled catalysts with superior performance.
Funding Information:
Electron microscopy samples were processed and analyzed in the Electron Microscopy Laboratory, Institute of Biomedicine, University of Turku, which receives financial support from Biocenter Finland.
Funding Information:
IS is grateful for the support from the Ministry of Science and Higher Education of the Russian Federation under the governmental order for Boreskov Institute of Catalysis (project AAAA-A21-121011390055-8).
Publisher Copyright:
© 2022 The Authors
PY - 2022/3/24
Y1 - 2022/3/24
N2 - One-pot continuous synthesis of menthols both from citronellal and citral was investigated over 5 wt% Ni supported on H-Beta-38-sepiolite composite catalyst at 60–70 °C under 10–29 bar hydrogen pressure. A relatively high menthols yield of 53% and 49% and stereoselectivity to menthol of 71–76% and 72–74% were obtained from citronellal and citral respectively at the contact time 4.2 min, 70 °C and 20 bar. Citral conversion noticeably decreased with time-on-stream under 10 and 15 bar of hydrogen pressure accompanied by accumulation of citronellal, the primary hydrogenation product of citral, practically not affecting selectivity to menthol. A substantial amount of defuctionalization products observed during citral conversion, especially at the beginning of the reaction (ca. 1 h), indicated that all intermediates could contribute to formation of menthanes. Ni/H-Beta-38-sepiolite composite material prepared by extrusion was characterized by TEM, SEM, XPS, XRD, ICP-OES, N2 physisorption and FTIR techniques to perceive the interrelation between the physico-chemical and catalytic properties.
AB - One-pot continuous synthesis of menthols both from citronellal and citral was investigated over 5 wt% Ni supported on H-Beta-38-sepiolite composite catalyst at 60–70 °C under 10–29 bar hydrogen pressure. A relatively high menthols yield of 53% and 49% and stereoselectivity to menthol of 71–76% and 72–74% were obtained from citronellal and citral respectively at the contact time 4.2 min, 70 °C and 20 bar. Citral conversion noticeably decreased with time-on-stream under 10 and 15 bar of hydrogen pressure accompanied by accumulation of citronellal, the primary hydrogenation product of citral, practically not affecting selectivity to menthol. A substantial amount of defuctionalization products observed during citral conversion, especially at the beginning of the reaction (ca. 1 h), indicated that all intermediates could contribute to formation of menthanes. Ni/H-Beta-38-sepiolite composite material prepared by extrusion was characterized by TEM, SEM, XPS, XRD, ICP-OES, N2 physisorption and FTIR techniques to perceive the interrelation between the physico-chemical and catalytic properties.
KW - Citral hydrogenation
KW - Continuous reactor
KW - Extrudates
KW - Menthol synthesis
KW - Ni/Beta catalyst
UR - http://www.scopus.com/inward/record.url?scp=85127051491&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2022.118586
DO - 10.1016/j.apcata.2022.118586
M3 - Article
AN - SCOPUS:85127051491
SN - 0926-860X
VL - 636
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 118586
ER -