The sonochemical synthesis of nanostructured materials owes its origins to the extreme conditions created during acoustic cavitation, i.e., the formation of localized hot spots in the core of collapsing bubbles in a liquid irradiated with high intensity ultrasound (US). In particular, in the present work a sonochemical synthesis has been investigated for the production of three different iron-based samples supported on SiO2 and loaded with different metals and promoters (10 %wt of Fe; 30 %wt of Fe; 30 %wt of Fe, 2 %wt of K and 3.75 %wt of Cu) active in the Fischer-Tropsch (FT) process. Sonochemically synthesized heterogeneous catalysts were characterized by BET, XRPD, TPR, ICP, CHN, TEM, SEM and then tested in a fixed bed FT-bench-scale rig fed with a mixture of H2 and CO at a H2/CO molar ratio equal to 2, at activation temperatures of 350–400 °C and reaction temperatures of 250–260 °C. The experimental results showed that the ultrasonic samples are effective catalysts for the FT process. Notably, increasing the activation temperature increased CO conversion, while product selectivity did not diminish. All the sonochemically prepared samples presented in this work provided better catalytic results compared to the corresponding traditional FT impregnated catalysts.
Fe-based heterogeneous catalysts for the Fischer-Tropsch reaction: Sonochemical synthesis and bench-scale experimental tests / A. Comazzi, C. Pirola, M. Longhi, C.L.M. Bianchi, K.S. Suslick. - In: ULTRASONICS SONOCHEMISTRY. - ISSN 1350-4177. - 34(2017), pp. 774-780.
|Titolo:||Fe-based heterogeneous catalysts for the Fischer-Tropsch reaction: Sonochemical synthesis and bench-scale experimental tests|
COMAZZI, ALBERTO (Corresponding)
PIROLA, CARLO (Secondo)
BIANCHI, CLAUDIA LETIZIA MADDALENA (Penultimo)
|Parole Chiave:||Fischer Tropsch; Iron based catalysts; Sonochemical synthesis; Syngas; Ultrasound; Chemical Engineering (miscellaneous); Acoustics and Ultrasonics; Radiology, Nuclear Medicine and Imaging|
|Settore Scientifico Disciplinare:||Settore ING-IND/25 - Impianti Chimici|
Settore CHIM/04 - Chimica Industriale
|Data di pubblicazione:||2017|
|Data ahead of print / Data di stampa:||2016|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.ultsonch.2016.07.012|
|Appare nelle tipologie:||01 - Articolo su periodico|