Craqueamento catalítico de polietileno em condições de refinaria: produção de frações combustíveis

Abstract

Resumo: Este trabalho foi realizado em uma unidade de teste de microatividade para estudar o processo de craqueamento catalítico das cargas combinadas de polietileno de baixa densidade e polietileno de alta densidade com vaselina, frente a catalisadores comerciais de FCC (alta e baixa atividades), para avaliar a produção das frações combustíveis (gasolina, diesel e resíduo). As cargas combinadas de PEBD e PEAD/vaselina foram processadas em condições de refinaria. Para as cargas de PEBD/vaselina, a 2, 6 e 10% p/p, a produção da fração gasolina foi favorecida pelo catalisador de alta atividade, enquanto que a carga de PEAD/vaselina a 2% p/p, para produção da mesma fração, o catalisador de baixa atividade apresentou melhor eficiência. Todas as cargas combinadas, nas diversas concentrações, mostraram que o material inerte (caulim) apresenta maior atuação, na produção da fração resíduo, indicando a ocorrência preferencial de craqueamento térmico. Palavras-chave: Polietileno, degradação, zeólita.Abstract: This work was carried out in an unit of microactivity test, to study the process of combined feeds of low density and high density polyethylenes with vaseline and commercial FCC catalysts (of low and of high activities), to evaluate the production of fuel fractions (gasoline, diesel and residue). The combined feeds of PEBD and PEAD/vaseline, at different concentrations, were processed under refinery conditions. For feeds of PEBD/vaseline at 2, 6 and 10% w/w, production of the gasoline fraction was favored with the high-activity catalyst, while for the PEAD/vaseline feed at 2%, in the production of the same fraction, the low-activity catalyst presented better performance. For all the combined feeds, in all concentrations, the inert material showed better performance for the production of residue fraction, indicating the preferential occurrence of thermal cracking.

Kaolin and commercial fcc catalysts in the cracking of loads of polypropylene under refinary conditions

“…Several authors have studied the application of these catalysts to the pyrolysis of plastic materials (Vasile et al, 1985 and1988;Beltrame et al, 1989;Audisio et al, 1992;Lin & White, 1995;Ochoa et al, 1996;Serrano et al, 2001;Aguado et al, 2001;Marcilla et al, 2003;Seo et al, 2003;Ribeiro et al, 2006). Therefore, the objective of this work was the evaluation of the performance of commercial FCC catalysts (low, medium and high activities).…”

Thermochemical Transformation of Municipal Household Solid Waste Fractions into Bio-Oils and Bio-Adsorbents

“…It is important to highlight that catalytic pyrolysis (catalytic cracking) is one of the most important processes in the refining industry, especially when it comes to the process of obtaining a gasoline of better quality and higher octane (through the optimization of aromatic and olefin contents) [34,35]. To date, no research has investigated the effect of temperature and percentage of FCC zeolite-type catalyst on the MSW fraction (organic matter + paper + plastic) and its implications on biochar morphology and crystal structure, as well as on the yield of reaction products, chemical composition and acidity of bio-oils obtained by pyrolysis and catalytic pyrolysis.…”