Catalytic Pyrolysis of a Biodiesel Surrogate over a HZSM-5 Zeolite Catalyst
- Accepted Date: 2020-07-02
Abstract: To obtain insight into the catalytic reaction mechanism of biodiesels over ZSM-5 zeolites, the pyrolysis and catalytic pyrolysis of methyl butanoate (MB), a biodiesel surrogate, with H-type ZSM-5 (HZSM-5) was performed in a flow reactor under atmospheric pressure. The pyrolysis products were identified and quantified using gas chromatography-mass spectrometry (GC-MS). Kinetic modelling and experimental revealed that H-atom abstraction in the gas phase was the primary pathway for MB decomposition during pyrolysis, but dissociating to ketene and methanol over HZSM-5 was the primary pathway for MB consumption during catalytic pyrolysis. The initial decomposition temperature of MB was reduced by approximately 300 K over HZSM-5 compared to that for the uncatalyzed reaction. In addition, the apparent activation energies of MB under catalytic pyrolysis and homogeneous pyrolysis conditions were obtained using the Arrhenius equation. The significantly reduced apparent activation energy confirmed the catalytic performance of HZSM-5 for MB pyrolysis. The activation temperature may also affect some catalytic properties of HZSM-5. Overall, this study can be used to guide subsequent catalytic combustion for practical biodiesel fuels.
|Citation:||Si-yu Qian, Bei-bei Feng, Yi-tong Zhai, Wei Zhao, Lei Wang, Cheng-cheng Ao, Yi Liu, Jing Liu, Li-dong Zhang. Catalytic Pyrolysis of a Biodiesel Surrogate over a HZSM-5 Zeolite Catalyst[J]. Chinese Journal of Chemical Physics .|