resumo
The oligomerisation of light olefins, obtainable from fossil/renewable sources and refinery streams, is an attractive route to produce clean synthetic fuels and added-value chemicals. ZSM-5 is a type of catalyst used in commercial olefin oligomerisation processes. Using appropriate modification procedures, it was possible to prepare catalysts with improved performances. Various modified versions of commercially available ZSM-5 were prepared and investigated for 1-butene oligomerisation under high-pressure, continuous-flow operation (30 bar, 200 degrees C). Simple, up-scalable top-down strategies involving base-acid treatments of ZSM-5 led to catalysts possessing enlarged pores and the required acidity for converting 1-butene to higher molar mass products. In targeting diesel type products, the modified catalysts led to up to 86% butenes conversion, space time yield of 852 mgg(cat)(-1)h(-1) and mass ratio diesel:naphtha cuts of 2.2. Characterisation studies and multivariate/principal component analysis helped categorise the differently prepared catalysts, and gain insights into complex interplay of material properties influencing the catalytic reaction.
palavras-chave
LIGHT OLEFINS OLIGOMERIZATION; QUALITY LIQUID FUELS; ONE-STEP SYNTHESIS; HIERARCHICAL ZSM-5; FISCHER-TROPSCH; PROPENE OLIGOMERIZATION; ZEOLITE CATALYSTS; DIESEL PRODUCTION; ACID CATALYSTS; HIGH-PRESSURE
categoria
Chemistry
autores
Silva, AF; Fernandes, A; Antunes, MM; Ribeiro, MF; Silva, CM; Valente, AA
nossos autores
Anabela Tavares Aguiar Valente
Investigador Principal
Andreia de Freitas Silva
Bolseiro de investigação
Carlos Manuel Silva
Professor associadoagradecimentos
This work was developed in the scope of the project CICECO-Aveiro Institute of Materials, FCT (Fundacao para a Ciencia e Tecnologia) Ref. UID/CTM/50011/2019, financed by national funds through the FCT/MCTES. The FCT and the European Union are acknowledged for a Ph.D. grant to A.F.S. (SFRH/BD/101018/2014). M.M.A. and A.F. thank the costs resulting from the FCT hirings which are funded by national funds (OE), through FCT - Fundacao para a Ciencia e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19 The authors wish to thank Saint-Gobain Ceramic Materials AS for generously supplying the SIKA SiC sample.