Catalytic Pyrolysis of Polypropylene to Benzene, Toluene, and Xylene (BTX) Using a Double-Fluidized-Bed Reactor.

ABSTRACT: The current plastic value chain is highly linear, leading to large amounts of waste plastics that harm the environment and human health. Recycling is required, and among the options, catalytic pyrolysis is particularly suited to convert polyolefin-rich plastic waste into useful chemicals such as benzene, toluene, and xylene (BTX). In this paper, we demonstrate ex situ catalytic pyrolysis of polypropylene in a continuous double-fluidized-bed reactor to produce BTX. The optimal pyrolysis temperature in the first fluidized-bed reactor was 550 °C, giving a BTX yield of 22.3 wt % (based on PP input). Lowering the nitrogen flow rate and the use of smaller catalyst particle sizes favor BTX formation. Our novel reactor concept showed good operational stability at longer times on stream (TOS

SUBMITTER: Wang H 

PROVIDER: S-EPMC11849447 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature