Biomass fast pyrolysis in a drop tube reactor for bio oil production: Experiments and modeling

A critical issue in the design of bubbling fluidized bed reactors for biomass fast pyrolysis is to maintain the bed at a constant level to ensure stable operation. In this work, a bubbling fluidized bed reactor was investigated to deal with this issue. The reactor consists of inner and outer tubes and enables in situ control of the fluidized-bed level in the inner-tube reactor with a mechanical method during biomass fast pyrolysis. The significant fraction of biochar produced from the fast pyrolysis in the inner-tube reactor was automatically removed through the annulus between the inner and outer tubes. The effect of pyrolysis temperature (426–528 °C) and feeding rate (0.8–1.8 kg/h) on the yield and characteristics of bio-oil, biochar, and gaseous products were examined at a 15 L/min nitrogen carrier gas flow rate for wood sawdust with a 0.5–1.0 mm particle size range as a feed. The bio-oil reached a maximum yield of 62.4 wt% on a dry basis at 440 °C, and then slowly decreased with increasing temperature. At least 79 wt% of bio-char byproduct was removed through the annulus and was found in the reactor bottom collector. The GC-MS analysis found phenolics to be more than 40% of the bio-oil products.

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Rice Husk and Its Pretreatments for Bio-oil Production via Fast Pyrolysis: a Review

BioEnergy Research ◽

10.1007/s12155-019-10059-w ◽

2019 ◽

Vol 13 (1) ◽

pp. 23-42 ◽

Cited By ~ 4

Author(s):

Siu Hua Chang

Keyword(s):

Rice Husk ◽

Fast Pyrolysis ◽

Oil Production ◽

Bio Oil

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Bio-oil production from fast pyrolysis of furniture processing residue

Korean Journal of Chemical Engineering ◽

10.1007/s11814-020-0688-x ◽

2021 ◽

Vol 38 (2) ◽

pp. 306-315

Author(s):

Hoang Vu Ly ◽

Quoc Khanh Tran ◽

Byung Hee Chun ◽

Changho Oh ◽

Jinsoo Kim ◽

...

Keyword(s):

Fast Pyrolysis ◽

Oil Production ◽

Bio Oil

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BIO-OIL FROM RUBBER WOOD: EFFECTS OF UPGRADING CONDITIONS

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/58/5/15023 ◽

2020 ◽

Vol 58 (5) ◽

pp. 604

Author(s):

Hong Nam Nguyen ◽

Bùi Văn Đức ◽

Ngoc Linh Vu ◽

Hong Nam Nguyen ◽

Thi Thu Ha Vu ◽

...

Keyword(s):

Product Quality ◽

Hevea Brasiliensis ◽

Fast Pyrolysis ◽

Oil Production ◽

Experimental Results ◽

Oil Yield ◽

Heating Value ◽

Rubber Wood ◽

Bio Oil

Despite its prominent potential, the use of rubber wood (Hevea brasiliensis) for bio-oil production has not been fully investigated. This study reported experimental results of the bio-oil production and upgrading from rubber wood using fast pyrolysis technology. The effects of catalyst nature (vermiculite and dolomite), upgrading temperature and bio-oil/catalyst ratio on the product quality were deeply investigated. The results showed that dolomite was suitable to be used as a catalyst for bio-oil upgrading. At 600 °C and a bio-oil/catalyst ratio of 1:1, the bio-oil yield was maximized, while at 400 °C and a ratio of 1:3, the bio-oil heating value was maximized. Depending on usage purposes, a yield-oriented, heating value-oriented or in-between bio-oil upgrading solution could be considered.

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