Aplicación de zeolitas ZSM-11 modificadas en la degradación catalítica de polietileno de baja densidad.

MARÍA S. RENZINI Y LILIANA B. PIERELLA.

Gramado - Brasil.

Simposio; XX SICAT – Simpósio Ibero-Americano de Catálise.; 2006

Low density polyethylene (LDPE) was converted to a mixed of lower and higher hydrocarbons over microporous (ZSM-11) modified materials with the incorporation of cations H+ and Zn2+. The Zn-ZSM-11 exhibited the highest levels of liquid hydrocarbons (>70 wt %) and aromatic hydrocarbons. A one-pass reactor in the temperature range of 400-500oC and atmospheric pressure was employed. We observed the complete conversion of LDPE, in the range of temperatures studied. The crystallinity, the nature of the structure and the stability of the synthesized and modified catalysts after cations incorporation were confirmed by XRD, FTIR and surface area by BET. By FTIR of pyridine adsorbed at room temperature and desorbed at different temperatures, specifically absorption bands at ~1600-1660cm-1 were found for the three catalysts. The reactant was characterized by XRD, FTIR and TG-DSC. Reaction products were analyzed by gas chromatographic and mass spectrometry. By means of the development of a competitive catalytic system of the process of degradation of LDPE remainders towards the synthesis of gaseous and liquid hydrocarbons.+ and Zn2+. The Zn-ZSM-11 exhibited the highest levels of liquid hydrocarbons (>70 wt %) and aromatic hydrocarbons. A one-pass reactor in the temperature range of 400-500oC and atmospheric pressure was employed. We observed the complete conversion of LDPE, in the range of temperatures studied. The crystallinity, the nature of the structure and the stability of the synthesized and modified catalysts after cations incorporation were confirmed by XRD, FTIR and surface area by BET. By FTIR of pyridine adsorbed at room temperature and desorbed at different temperatures, specifically absorption bands at ~1600-1660cm-1 were found for the three catalysts. The reactant was characterized by XRD, FTIR and TG-DSC. Reaction products were analyzed by gas chromatographic and mass spectrometry. By means of the development of a competitive catalytic system of the process of degradation of LDPE remainders towards the synthesis of gaseous and liquid hydrocarbons.