scholarly journals Comparative analyses of Nigerian and US corn Stalks, using PY-GC/MS

2015 ◽  
Vol 3 (1) ◽  
pp. 18
Author(s):  
Anthonia E. Eseyin ◽  
El Barbary Hassan ◽  
Emad, M El-Giar
Keyword(s):  
Fast Pyrolysis ◽  
Acid Methyl Ester ◽  
The Other ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Products ◽  
Pyrolysis Gas Chromatography ◽  
Acid Methyl ◽  
Bio Oil ◽  
The Us

<p>Pyrolysis gas chromatography mass spectrometry (Py-GC/MS) studies were carried out on the Nigerian and US corn stalks at 500 °C. Analyses of the fast pyrolysis products showed that the Nigerian corn stalks produced more diverse compounds like: acetaldehyde, acetic acid methyl ester, 2,3-pentanedione, 1-hydroxy-2-butanone, butanedial, phenol and vanillin. On the other hand, the pyrolyzed US corn stalks produced compounds like: furfural, phenol, 2-methoxy, 2-methylbenzaldehyde, and 2-methoxy-4-vinylphenol which had significantly high peak area percentages. Few anhydrous sugars were detected in the pyrolysis products of both samples. Both samples were found to be good biomass for the production of bio-oil and chemicals. However, the Nigerian corn stalks seem to be more suitable for the production of bio-oil while the US corn stalks seem to be more suitable for the production of valuable chemicals.</p>

scholarly journals Hydro-Pyrolysis and Catalytic Upgrading of Biomass and Its Hydroxy Residue Fast Pyrolysis Vapors

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3474 ◽  
Author(s):  
Yichen Liu ◽  
James J. Leahy ◽  
Jacek Grams ◽  
Witold Kwapinski
Keyword(s):  
Aromatic Hydrocarbons ◽  
Average Molecular Weight ◽  
Fast Pyrolysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Catalytic Upgrading ◽  
Lower Viscosity ◽  
Bio Oil ◽  
Sulfated Tio2 ◽  
Hydrolysis Residue

Fast pyrolysis of Miscanthus, its hydrolysis residue and lignin were carried with a pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) followed by online vapor catalytic upgrading with sulfated ZrO2, sulfated TiO2 and sulfated 60 wt.% ZrO2-TiO2. The most evident influence of the catalyst on the vapor phase composition was observed for aromatic hydrocarbons, light phenols and heavy phenols. A larger amount of light phenols was detected, especially when 60 wt.% ZrO2-TiO2 was present. Thus, a lower average molecular weight and lower viscosity of bio-oil could be obtained with this catalyst. Pyrolysis was also performed at different pressures of hydrogen. The pressure of H2 has a great effect on the overall yield and the composition of biomass vapors. The peak area percentages of both aromatic hydrocarbons and cyclo-alkanes are enhanced with the increasing of H2 pressure. The overall yields are higher with the addition of either H2 or sulfated catalysts. This is beneficial as phenols are valuable chemicals, thus, increasing the value of bio-oil. The results show that the hydrolysis residue has the potential to become a resource for phenol production.

Naphthalene and Alkyl Naphthalene from Catalytic Fast Pyrolysis of Biomass Over ZSM-5 Aggregates

2020 ◽  
Vol 14 (2) ◽  
pp. 195-202 ◽  
Author(s):  
Fanjun Meng ◽  
Qiaoyan Shang ◽  
Dongliang Hua ◽  
Lei Chen ◽  
Laizhi Sun ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Fast Pyrolysis ◽  
Product Distribution ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Organic Templates ◽  
Pyrolysis Of Biomass ◽  
Pyrolytic Product

Seed-induced synthesis of ZSM-5 aggregates was carried out without organic templates. The prepared ZSM-5 aggregates were used upgrading polar sawdust-derived pyrolytic vapors for the selective production of naphthalene and alkyl naphthalene. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) experiments were conducted to analyze the pyrolytic product distribution and evaluate the catalyst performance. Due to the mesopores and proper acidities of ZSM-5 aggregates, the yield of naphthalene and methylnaphthalene over ZSM-5 aggregates were 36.0 and 123.7 mg/g, which were 2.7 and 2.6 times of those respectively over the commercial ZSM-5. The total selectivities of naphthalene and alkyl naphthalene could reach 61.56%.

Analytical Fast Pyrolysis of Glucose, Cellubiose and Cellulose: Comparison of the Pyrolytic Product Distribution

2013 ◽  
Vol 805-806 ◽  
pp. 186-190
Author(s):  
Hang Tao Liao ◽  
Yang Zhang ◽  
Qiang Lu ◽  
Chang Qing Dong
Keyword(s):  
Mass Spectrometry ◽  
Fast Pyrolysis ◽  
Product Distribution ◽  
Gas Chromatography Mass Spectrometry ◽  
Analytical Pyrolysis ◽  
Pyrolysis Gas ◽  
Pyrolysis Gas Chromatography ◽  
Pyrolytic Products ◽  
Fragmentation Reactions ◽  
Pyrolytic Product

Analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) was employed for the fast pyrolysis of glucose, cellubiose and cellulose in this study. The pyrolytic products from the three glucose-based materials were determined and compared to reveal the distribution differences. The results indicated that fast pyrolysis of the three materials obtained similar pyrolytic products, including the anhydrosugars, furans, linear carbonyls and cyclopentanones, but the distribution of the pyrolytic products differed from each other. The cellulose formed more anhydrosugars, but less carbonyls and furans than the glucose and cellubiose. The glycosidic bond of the cellubiose and cellulose would favor the pyrolytic depolymerization reactions to form various anhydrosugars, while inhibit the pyrolytic fragmentation reactions to produce linear carbonyls.

Pyrolysis gas chromatography - mass spectrometry of humic substances extracted from Canadian lake sediments

2000 ◽  
Vol 78 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Helen A Joly ◽  
Hongbo Li ◽  
Nelson Belzile
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Humic Acid ◽  
Lake Sediments ◽  
Humic Substances ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Pyrolysis Products ◽  
Pyrolysis Gas Chromatography ◽  
Chromatography Mass Spectrometry

Humic substances (HS) were extracted with the aid of 0.1 M Na4P2O7 and 0.5 M NaOH solutions from the sediments of four lakes located in the Sudbury area in Ontario, Canada, namely, Tilton, Clearwater, Silver and Ramsey Lake. The humic acid (HA) and fulvic acid (FA) extracts, purified and characterized using classical methods i.e., elemental analysis, FTIR spectroscopy, and CPMAS 13C NMR (see N. Belzile, H.A. Joly, and H. Li. (1997)), were submitted to pyrolysis - gas chromatography - mass spectrometry (Py-GC-MS). The pyrolysates of the HA and FA extracts were found to be complex mixtures of at least 200 compounds. Results based on statistical analysis of the abundances of pyrolysis products (of known origin) revealed trends similar to those obtained from the classical bulk characterization techniques. The Py-GC-MS technique supported the observation, obtained from classical methods, that the chemical composition of HA extracts varied less significantly among the four lake sediments than for the FA extracts. The abundances of lignin and carbohydrate pyrolysates showed the highest variation among the FA extracts. Pyrolysis products originating from lignin, carbohydrates, proteins, and fatty acids were identified. Key words: humic substances, humic acid, fulvic acid, pyrolysis, pyrolysis – gas chromatography – mass spectrometry, lake sediments.

scholarly journals Chromatographic analysis of bio-oil formed in fast pyrolysis of lignocellulosic biomass

2020 ◽  
Vol 39 (1) ◽  
pp. 65-77
Author(s):  
Jacek Grams
Keyword(s):  
Lignocellulosic Biomass ◽  
Complex Structure ◽  
Fast Pyrolysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Lignocellulosic Feedstock ◽  
Temperature Decomposition ◽  
Bio Oil ◽  
Gc X Gc

AbstractFast pyrolysis of lignocellulosic biomass is one of the most promising methods of the production of renewable fuels. However, an optimization of the conditions of bio-oil production is not possible without comprehensive analysis of the composition of formed products. There are several methods for the determination of distribution of products formed during thermal decomposition of biomass with chromatography being the most versatile among them. Although, due to the complex structure of bio-oil (presence of hundreds chemical compounds with different chemical character), an interpretation of the obtained chromatograms is not an easy task. Therefore, the aim of this work is to present an application of different chromatographic methods to the analysis of the composition of the mixture of products formed in high temperature decomposition of lignocellulosic feedstock. It includes pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS), two dimensional gas (GC x GC) or liquid chromatography (LC x LC) and initial fractionation of bio-oil components. Moreover, the problems connected with the analysis of bio-oils formed with the use of various fast pyrolysis reactors and capabilities of multivariate analysis are discussed.

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