Analysis of Precursors of Carbon Deposition in Hydrogen Preparation by Fast Pyrolysis of Bio-Oil via Catalytic Steam Reforming

In the preparation of hydrogen, the bio-oil from pyrolysis of biomass must be further upgraded (catalytic steam reforming)SO as to improve its quality．However the catalyst used in the steam reforming reaction is easy to lose its activity due to being coked' SO that it is important to study the coke formation and its efects on the catalyst activity in the steam reforming process．Fourier Transform Infrared Spectroscopy were used to analyze the precursor of coke on the catalyst Ni/MgO-La2O3-Al2O3 used in steam reforming reaction and the mechanism of coking Was also discussed based on it．The results indicate that precursors of coke deposited inside the pore of the molecular sieve are mainly paraffin, alcohols, aldehydes and ketones, and aromatic compounds.

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Catalytic Steam Reforming of Fast Pyrolysis Bio-Oil in Fixed Bed and Fluidized Bed Reactors

Chemical Engineering & Technology ◽

10.1002/ceat.201000169 ◽

2010 ◽

Vol 33 (12) ◽

pp. 2021-2028 ◽

Cited By ~ 53

Author(s):

P. Lan ◽

Q. Xu ◽

M. Zhou ◽

L. Lan ◽

S. Zhang ◽

...

Keyword(s):

Fluidized Bed ◽

Steam Reforming ◽

Fast Pyrolysis ◽

Fixed Bed ◽

Fluidized Bed Reactors ◽

Bio Oil ◽

Catalytic Steam Reforming

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Hydrogen Production via Catalytic Steam Reforming of Fast Pyrolysis Bio-oil in a Fluidized-Bed Reactor

Energy & Fuels ◽

10.1021/ef1010995 ◽

2010 ◽

Vol 24 (12) ◽

pp. 6456-6462 ◽

Cited By ~ 44

Author(s):

Qingli Xu ◽

Ping Lan ◽

Baozhen Zhang ◽

Zhizhong Ren ◽

Yongjie Yan

Keyword(s):

Hydrogen Production ◽

Fluidized Bed ◽

Steam Reforming ◽

Fast Pyrolysis ◽

Fluidized Bed Reactor ◽

Bio Oil ◽

Catalytic Steam Reforming

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Hydrogen production via catalytic steam reforming of fast pyrolysis bio-oil in a two-stage fixed bed reactor system

Fuel Processing Technology ◽

10.1016/j.fuproc.2008.05.018 ◽

2008 ◽

Vol 89 (12) ◽

pp. 1306-1316 ◽

Cited By ~ 104

Author(s):

C. Wu ◽

Q. Huang ◽

M. Sui ◽

Y. Yan ◽

F. Wang

Keyword(s):

Hydrogen Production ◽

Steam Reforming ◽

Fast Pyrolysis ◽

Fixed Bed ◽

Reactor System ◽

Fixed Bed Reactor ◽

Two Stage ◽

Bio Oil ◽

Catalytic Steam Reforming

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Production of Phenolic-Rich Bio-Oil from Catalytic Fast Pyrolysis of Biomass Over Tailored Fe-Based Catalysts

Journal of Biobased Materials and Bioenergy ◽

10.1166/jbmb.2020.1944 ◽

2020 ◽

Vol 14 (2) ◽

pp. 178-185 ◽

Cited By ~ 1

Author(s):

Shuangxia Yang ◽

Xiaodong Zhang ◽

Feixia Yang ◽

Baofeng Zhao ◽

Lei Chen ◽

...

Keyword(s):

Calcination Temperature ◽

Pyrolysis Temperature ◽

Fast Pyrolysis ◽

Product Distribution ◽

Gas Chromatography Mass Spectrometry ◽

Pyrolysis Gas ◽

Bio Oil ◽

Aldehydes And Ketones ◽

Biomass Ratio ◽

Pyrolysis Of Biomass

The objective of this study is to catalytically upgrade fast pyrolysis vapors of sawdust using various Fe-based catalysts for producing phenolic-rich bio-oil by analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) technique. A variety of parameters, including support characteristic, calcination temperature, pyrolysis temperature, as well as the catalyst-to-biomass ratio during the pyrolysis process were evaluated for their effects on product distribution of bio-oil. GC-MS analysis showed that compared to Fe–Mg and Fe–Al catalysts, the developed Fe–Ca catalyst significantly promoted the formation of phenols and its derivatives. The phenolic concentration declined with increasing calcination temperature and pyrolysis temperature, while increased monotonically along with increasing catalyst-to-biomass ratio. The phenolics concentration was high upto 81% (peak area) under optimum conditions of calcination temperature of 500 °C, pyrolysis temperature of 600 °C and catalyst-to-biomass ratio of 10. At higher catalyst-to-biomass ratio of 20, phenolics (88.03% in peak area) and hydrocarbons (including 7.86% of aromatics and 4.1% aliphatics) were the only two components that can be detected, with all the acids, aldehydes and ketones completely eliminated. This indicated the excellent capability of developed Fe–Ca catalyst in promoting the decomposition of lignin in biomass to generate phenolic compounds and meanwhile inhibiting the devolatilization of holocellulose.

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