scholarly journals Effect of Catalytic Pyrolysis Conditions Using Pulse Current Heating Method on Pyrolysis Products of Wood Biomass

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Sensho Honma ◽  
Toshimitsu Hata ◽  
Takashi Watanabe
Keyword(s):  
Aromatic Compounds ◽  
Catalytic Pyrolysis ◽  
Pulse Current ◽  
Polyaromatic Hydrocarbons ◽  
Pyrolysis Oil ◽  
Wood Biomass ◽  
Oil Composition ◽  
Pyrolysis Products ◽  
Heating Method ◽  
Pyrolysis Of Biomass

The influence of catalysts on the compositions of char and pyrolysis oil obtained by pyrolysis of wood biomass with pulse current heating was studied. The effects of catalysts on product compositions were analyzed using GC-MS and TEM. The compositions of some aromatic compounds changed noticeably when using a metal oxide species as the catalyst. The coexistence or dissolution of amorphous carbon and iron oxide was observed in char pyrolyzed at 800°C with Fe3O4. Pyrolysis oil compositions changed remarkably when formed in the presence of a catalyst compared to that obtained from the uncatalyzed pyrolysis of wood meal. We observed a tendency toward an increase in the ratio of polyaromatic hydrocarbons in the pyrolysis oil composition after catalytic pyrolysis at 800°C. Pyrolysis of biomass using pulse current heating and an adequate amount of catalyst is expected to yield a higher content of specific polyaromatic compounds.

Experimental Study on Catalytic Pyrolysis of Biomass Pellet

2013 ◽  
Vol 291-294 ◽  
pp. 320-323 ◽  
Author(s):  
Ai Jun Xue ◽  
Ji Hong Pan ◽  
Mao Cheng Tian
Keyword(s):  
Catalytic Pyrolysis ◽  
Test Bench ◽  
Biomass Gasification ◽  
Biomass Pyrolysis ◽  
Corn Straw ◽  
Pyrolysis Products ◽  
Volume Percentage ◽  
Pyrolysis Characteristics ◽  
Pyrolysis Of Biomass ◽  
Biomass Pellet

In the present study, catalytic pyrolysis characteristics of corn straw pellet were studied in biomass pyrolysis test bench. The effect of content of CaO added in biomass pellet on pyrolysis products was investigated. The results showed that: with the increase of CaO content, the yield of tar decreased ,and the yield of char and gas increased. Among gas compositions, the volume percentage of CO、H2、CH4 increased, while the volume percentage of CO2 decrease greatly. The Calorific values of the gas increase distinctly. The results have significant theoretical guidance on the application of biomass pellets in biomass gasification equipments.

Effect of acidity and manner of addition of HZSM-5 catalyst on the aromatic products during catalytic upgrading of biomass pyrolysis

BioResources ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. 8286-8305
Author(s):  
Yunwu Zheng ◽  
Lei Tao ◽  
Xiaoqin Yang ◽  
Yuanbo Huang ◽  
Can Liu ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Aromatic Compounds ◽  
Catalytic Pyrolysis ◽  
Calorific Value ◽  
Ex Situ ◽  
Average Pore ◽  
Polycyclic Aromatic ◽  
Hydrocarbon Yield ◽  
Pyrolysis Of Biomass

To investigate the effects of acidity on aromatic yield and selectivity during the catalytic pyrolysis of biomass, the silica to alumina ratio (SAR), as well as the amount and addition method of HZSM-5 catalyst were varied. The results showed that with an increase in the SAR, the pore volume was reduced, the average pore diameter of the HZSM-5 catalyst increased, and the total acidity and catalytic activity decreased. Meanwhile, the increase in acidity led to an increased non-condensable gases yield, which was associated with a decrease in the bio-oil yield. The calorific value and moisture content increased, and the ability of deoxygenation was enhanced. The single ring aromatic hydrocarbons (BTXE) content increased, and the polycyclic aromatic hydrocarbons (2-ring, 3-ring) content decreased noticeably. The selectivity of BTXE decreased substantially from 69 wt.% to 6.85 wt.%, while the selectivity of naphthalene and its derivatives increased remarkably, as the SAR increased. Additionally, the acidity increased the selectivity of unsubstituted aromatic compounds, but decreased the selectivity of substituted aromatic compounds. Moreover, ex situ catalytic pyrolysis more effectively enhanced the aromatic hydrocarbon yield and selectivity (69 wt.%) compared with in situ catalytic pyrolysis (27.51 wt.%), and in situ catalytic pyrolysis generated more polyaromatics and solid residue.

The Effects of Catalysts on Pyrolysis Products of Enzymolyzed Straw Lignin

2013 ◽  
Vol 295-298 ◽  
pp. 345-350
Author(s):  
Tehani A.E. Yones ◽  
Hai Bin Zhu ◽  
Yin Xuan Fu ◽  
Yong Mei Chen ◽  
Ping Yu Wan
Keyword(s):  
Small Molecule ◽  
Aromatic Hydrocarbons ◽  
Aromatic Compounds ◽  
Catalytic Pyrolysis ◽  
Product Distribution ◽  
Immersion Method ◽  
Pyrolysis Products ◽  
Pyrolysis Reaction ◽  
Cu Catalyst ◽  
Cu Catalysts

Lignin is depolymerized to small molecule aromatic compounds, which is regarded as one of the effective ways to achieve utilization of lignin resource. In this study, Al and Cu catalysts were loaded onto enzymolyzed straw lignin by the immersion method, and the product distribution of the catalytic pyrolysis of lignin was studied by GC-MS after being extracted by solvents. Results show that both Al and Cu catalysts can promote the lignin pyrolysis reaction. Based on the comparison of the product distribution without catalyst, Al catalyst is benefit to the formation of aromatic hydrocarbons, alcohols and phenols, while Cu catalyst contribute to the formation of hydrocarbons, alcohols and ketones.

scholarly journals Improving the Conversion of Biomass in Catalytic Pyrolysis via Intensification of Biomass—Catalyst Contact by Co-Pressing

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 805
Author(s):  
Ishaka Muhammad ◽  
George Manos
Keyword(s):  
Catalytic Pyrolysis ◽  
Treatment Method ◽  
Solid Catalyst ◽  
Pyrolysis Oil ◽  
Chemical Production ◽  
Spent Catalyst ◽  
Pressing Method ◽  
Biomass Components ◽  
Pre Treatment ◽  
Pyrolysis Of Biomass

Biomass pyrolysis is a promising technology for fuel and chemical production from an abundant renewable source. It takes place usually in two stages; non-catalytic pyrolysis with further catalytic upgrading of the formed pyrolysis oil. The direct catalytic pyrolysis of biomass reduces the pyrolysis temperature, increase the yield to target products and improves their quality. However, in such one-stage process the contact between biomass and solid catalyst particles is poor leading to an excessively high degree of pure thermal pyrolysis reactions. The aim of this study was to enhance the catalyst-biomass contact via co-pressing of biomass and catalyst particles as a pre-treatment method. Catalytic pyrolysis of biomass components with HY and USY zeolites was studied using thermogravimetric analysis (TGA), as well as experiments in a pyrolysis reactor. The liquid and coke yields were characterized using gas chromatography, and TGA respectively. The TGA results showed that the degradation of the co-pressed cellulose occurred at lower temperatures compared to the pure thermal degradation, as well as catalytic degradation of non-pretreated cellulose. All biomass components produced better results using the co-pressing method, where the liquid yields increased while coke/char yields decreased. Bio-oil from catalytic pyrolysis of cellulose with HY catalyst mainly produced heavier fractions, while in the presence of USY catalyst medium fraction was mainly produced within the gasoline range. For hemicellulose catalytic pyrolysis, the catalysts had similar effects in enhancing the lighter fraction, but specifically, HY showed higher selectivity to middle fraction while USY has produced higher percentage of lighter fraction. Using with both catalysts, co-pressing had the best effect of eliminating the heavier fraction and improving the gasoline range fraction. Spent catalyst from co-pressed sample had lower concentrations of coke/char components due to the shorter residence times of volatiles, which suppresses the occurrence of secondary reactions leading to coke/char formations.

scholarly journals Influence of the Zeolite ZSM-5 on Catalytic Pyrolysis of Biomass via TG-FTIR

BioResources ◽  
2015 ◽  
Vol 10 (3) ◽  
Author(s):  
Ze Wang ◽  
Siwei Liu ◽  
Weigang Lin ◽  
Wenli Song
Keyword(s):  
Catalytic Pyrolysis ◽  
Pyrolysis Of Biomass

A Fe-Ca/SiO2 catalyst for efficient production of light aromatics from catalytic pyrolysis of biomass

Fuel ◽  
2020 ◽  
Vol 279 ◽  
pp. 118500 ◽  
Author(s):  
Qiuxiang Lu ◽  
Shenfu Yuan ◽  
Chunxiang Liu ◽  
Tao Zhang ◽  
Xiaoguang Xie ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Efficient Production ◽  
Pyrolysis Of Biomass

Catalytic Pyrolysis of Biomass in a Fluidized Bed Reactor

2007 ◽  
Vol 85 (5) ◽  
pp. 473-480 ◽  
Author(s):  
A. Aho ◽  
N. Kumar ◽  
K. Eränen ◽  
T. Salmi ◽  
M. Hupa ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Catalytic Pyrolysis ◽  
Fluidized Bed Reactor ◽  
Pyrolysis Of Biomass

Catalytic Pyrolysis of Biomass over H+ZSM-5 under Hydrogen Pressure

2012 ◽  
Vol 26 (8) ◽  
pp. 5300-5306 ◽  
Author(s):  
Suchithra Thangalazhy-Gopakumar ◽  
Sushil Adhikari ◽  
Ram B. Gupta
Keyword(s):  
Hydrogen Pressure ◽  
Catalytic Pyrolysis ◽  
Pyrolysis Of Biomass

Emulsification of Catalytic Pyrolysis Oil from Nanoporous Zeolite Socony Mobil-5 with Diesel Using a Range of Emulsifiers in an Ultrasonicator

2021 ◽  
Vol 21 (7) ◽  
pp. 3955-3959
Author(s):  
Abid Farooq ◽  
Young-Kwon Park
Keyword(s):  
Diesel Engine ◽  
Catalytic Pyrolysis ◽  
Ex Situ ◽  
Engine Fuel ◽  
Pyrolysis Oil ◽  
Benzene Derivatives ◽  
Stable Emulsion ◽  
Physiochemical Properties ◽  
Span 80 ◽  
Tween 60

Catalytic pyrolysis oil (CPO) was produced from lignin using the ex-situ mechanism and nanoporous HZSM-5 (SiO2/Al2O3 = 50) as a catalyst. The oil contained phenolics, esters, acids, and benzene derivatives as the major constituents. The emulsification of CPO in diesel was tested with several emulsifier combinations such as Span 80 and Tween 60, Span 80 and Atlox 4916, and Atlox 4916 and Zephrym PD3315 in the HLB range of 5.8–7.3. The HLB value of 5.8 using the combination of Span 80 and Atlox 4916 and the CPO:emulsifier:diesel ratio of 5:2:93 (wt%), provided a stable emulsion for 10 days. The physiochemical properties of that emulsion were comparable to diesel. Hence, emulsions of CPO and diesel can potentially be used as a diesel engine fuel.

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