Journal
ENERGY & FUELS
Volume 35, Issue 20, Pages 16629-16636Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.1c02318
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Funding
- National Key Research and Development Plan of China [2018YFB1501403]
- National Nature Science Foundation of China [52006086, 5187060526, 51861130362]
- China Postdoctoral Science Found [2019M652637]
- Foundation of State Key Laboratory of Coal Combustion [FSKLCCB2001]
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The study investigated the promotion of aromatics production through catalytic pyrolysis of biomass with the combination of calcined dolomite and ZSM-5. Calcined dolomite was found to favor the removal of oxygen-containing components and enhance the formation of BTX, while also promoting the formation of H-2 and inhibiting the formation of naphthalene and 2-methyl-naphthalene. Under certain conditions, the highest BTX yield was achieved with a specific biomass:calcined dolomite:ZSM-5 ratio.
In this study, the method for the promotion of aromatics production through catalytic pyrolysis of biomass over the combination of calcined dolomite and ZSM-5 was investigated. The influence of reaction conditions and catalyst type on product distribution was studied in pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and a fixed-bed reactor. The results showed that calcined dolomite favored the removal of acids, sugars, and methoxyphenols, reducing the content of oxygen-containing components with a lower effective hydrogen to carbon ratio and larger molecule size, which thus enhanced the formation of BTX (benzene, toluene, and xylene) over ZSM-5. The highest BTX yield was achieved when the mass ratio of biomass:calcined dolomite:ZSM-5 was 1:1:4, which was 22.92% higher than ZSM-5 alone and 8% higher than the conventional CaO/ZSM-5 system. On the other hand, calcined dolomite favored the formation of H-2, contributing to the inhibition of the formation of naphthalene and 2-methyl-naphthalene.
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