Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 634, Issue -, Pages 141-149Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.03.351
Keywords
Biomass; Fast pyrolysis; Catalytic cracking; Py-GC/MS; Ce-Mo2N/HZSM-5; Monocyclic aromatic hydrocarbons
Categories
Funding
- National Natural Science Foundation of China [51676193, 51576064]
- National Basic Research Program of China [2015CB251501]
- Beijing Nova Program [Z171100001117064]
- Beijing Natural Science Foundation [3172030]
- Fok Ying Tung Education Foundation [161051]
- Fundamental Research Funds for the Central Universities [2018ZD08, 2017MS026, 2016YQ05]
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A series ofMo(2)N/HZSM-5 and transitionmetal modified Mo2N/HZSM-5 catalysts were prepared for the catalytic upgrading of pine wood-derived pyrolytic vapors for the selective production of monocyclic aromatic hydrocarbons (MAHs), while restraining the formation of polycyclic aromatic hydrocarbons (PAHs). Pyrolysis-gas chromatography/ mass spectrometry (Py-GC/MS) experiments were performed to determine the effects of several factors on selective MAHs production, including Mo2N loading on HZSM-5, transition metal (Fe, Ce, La, Cu, Cr) modification of Mo2N/HZSM-5, pyrolysis temperature, and catalyst-to-biomass ratio. In addition, quantitative experiments were conducted to determine the actual yields ofmajor aromatic hydrocarbons and the source of aromatic hydrocarbons from basic biomass components. Results indicated that among the various catalysts, the Ce-10% Mo2N/HZSM-5 exhibited the best performance on promoting the formation of MAHs and restraining the generation of PAHs. Under the optimal conditions, the actual yields of MAHs and PAHs from Ce-10% Mo2N/HZSM-5 catalytic process were 99.8 mg/g and 7.5 mg/g, while those fromHZSMcatalyst were only 77.2 mg/g and 23.7 mg/g respectively. Furthermore, the possible catalytic mechanism of the Ce-Mo2N/HZSM-5 catalyst was proposed based on the catalyst characterization. (C) 2018 Elsevier B.V. All rights reserved.
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