scholarly journals Microwave-assisted pyrolysis of seaweed biomass for aromatics-containing bio-oil production

2021 ◽  
Vol 261 ◽  
pp. 02045
Author(s):  
Xinyun Wang ◽  
Chuan Li ◽  
Mingqiang Chen ◽  
Jun Wang
Keyword(s):  
Aromatic Hydrocarbons ◽  
Pyrolysis Temperature ◽  
Relative Content ◽  
Oil Yield ◽  
Gas Chromatography Mass Spectrometry ◽  
Microwave Pyrolysis ◽  
Seaweed Biomass ◽  
Microwave Assisted ◽  
Bio Oil ◽  
Complex Organic

Microwave-assisted pyrolysis of seaweed biomass was conducted using a microwave pyrolysis system. The product yields were determined and the components of bio-oil were analyzed by a gas chromatography-mass spectrometry (GC-MS). Results showed that as the pyrolysis temperature increased from 400 °C to 600 °C, the gas yield increased and the bio-char yield decreased. However, the bio-oil yield rose firstly and then reduced. The maximal bio-oil yield was 18.4 wt.% when pyrolysis temperature was 500 °C. The bio-oil obtained is a mixture of very complex organic compounds, mainly consisting of aldehydes, ketones, alcohols, esters, phenols, aliphatic hydrocarbons, aromatic hydrocarbons and nitrogencontaining compounds. The relative content of aromatics in bio-oil accounted for about 16%. The above results reveal that microwave-assisted pyrolysis of seaweed biomass is a feasible method to produce aromatics-containing bio-oil.

Microwave-Assisted Pyrolysis of Biomass for Bio-Oil Production: A Review of the Operation Parameters

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Yaning Zhang ◽  
Wenke Zhao ◽  
Bingxi Li ◽  
Gongnan Xie
Keyword(s):  
Microwave Power ◽  
Pyrolysis Temperature ◽  
Oil Production ◽  
Electrical Heating ◽  
Oil Yield ◽  
Microwave Assisted ◽  
Bio Oil ◽  
Operation Parameters ◽  
Pyrolysis Of Biomass ◽  
Main Operation

As compared with the conventional electrical heating pyrolysis, microwave-assisted pyrolysis (MAP) is more rapid and efficient due to its unique heating mechanisms. However, bio-oil production from MAP of biomass is strongly dependent on the operation parameters. Based on the recent researches, this study reviews the effects of the main operation parameters including microwave power, pyrolysis temperature, and pyrolysis time on the bio-oil yield obtained from MAP of biomass. The results show that microwave power, pyrolysis temperature, and pyrolysis time usually increase the bio-oil yield initially and decrease the bio-oil yield finally. The reported optimal microwave powers, pyrolysis temperatures, and pyrolysis times were mainly in the ranges of 300–1500 W, 400–800 °C, and 6–25 min, respectively. The mechanisms for bio-oil produced from MAP of biomass as affected by the main operation parameters were also analyzed.

scholarly journals Bio-Oil Characterizations of Spirulina Platensis Residue (SPR) Pyrolysis Products for Renewable Energy Development

2020 ◽  
Vol 849 ◽  
pp. 47-52
Author(s):  
Siti Jamilatun ◽  
Aster Rahayu ◽  
Yano Surya Pradana ◽  
Budhijanto ◽  
Rochmadi ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Spirulina Platensis ◽  
Pyrolysis Temperature ◽  
Renewable Energy Sources ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Oil Yield ◽  
Optimum Temperature ◽  
Pyrolysis Products ◽  
Bio Oil

Nowadays, energy consumption has increased as a population increases with socio-economic developments and improved living standards. Therefore, it is necessary to find a replacement for fossil energy with renewable energy sources, and the potential to develop is biofuels. Bio-oil, water phase, gas, and char products will be produced by utilizing Spirulina platensis (SPR) microalgae extraction residue as pyrolysis raw material. The purpose of this study is to characterize pyrolysis products and bio-oil analysis with GC-MS. Quality fuel is good if O/C is low, H/C is high, HHV is high, and oxygenate compounds are low, but aliphatic and aromatic are high. Pyrolysis was carried out at a temperature of 300-600°C with a feed of 50 grams in atmospheric conditions with a heating rate of 5-35°C/min, the equipment used was a fixed-bed reactor. The higher the pyrolysis temperature, the higher the bio-oil yield will be to an optimum temperature, then lower. The optimum temperature of pyrolysis is 550°C with a bio-oil yield of 23.99 wt%. The higher the pyrolysis temperature, the higher the H/C, the lower O/C. The optimum condition was reached at a temperature of 500°C with the values of H/C, and O/C is 1.17 and 0.47. With an increase in temperature of 300-600°C, HHV increased from 11.64 MJ/kg to 20.63 MJ/kg, the oxygenate compound decreased from 85.26 to 37.55 wt%. Aliphatics and aromatics increased, respectively, from 5.76 to 36.72 wt% and 1.67 to 6.67 wt%.

scholarly journals Identification of VOCs in essential oils extracted using ultrasound- and microwave-assisted methods from sweet cherry flower

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Huimin Zhang ◽  
Hongguang Yan ◽  
Quan Li ◽  
Hui Lin ◽  
Xiaopeng Wen
Keyword(s):  
Essential Oil ◽  
Sweet Cherry ◽  
Dimethyl Sulfide ◽  
Solid Phase ◽  
Oil Yield ◽  
Gas Chromatography Mass Spectrometry ◽  
Process Conditions ◽  
Important Indicator ◽  
Microwave Assisted ◽  
Essential Oil Yield

AbstractThe floral fragrance of plants is an important indicator in their evaluation. The aroma of sweet cherry flowers is mainly derived from their essential oil. In this study, based on the results of a single-factor experiment, a Box–Behnken design was adopted for ultrasound- and microwave-assisted extraction of essential oil from sweet cherry flowers of the Brooks cultivar. With the objective of extracting the maximum essential oil yield (w/w), the optimal extraction process conditions were a liquid–solid ratio of 52 mL g−1, an extraction time of 27 min, and a microwave power of 435 W. The essential oil yield was 1.23%, which was close to the theoretical prediction. The volatile organic compounds (VOCs) of the sweet cherry flowers of four cultivars (Brooks, Black Pearl, Tieton and Summit) were identified via headspace solid phase microextraction (SPME) and gas chromatography–mass spectrometry (GC–MS). The results showed that a total of 155 VOCs were identified and classified in the essential oil from sweet cherry flowers of four cultivars, 65 of which were shared among the cultivars. The highest contents of VOCs were aldehydes, alcohols, ketones and esters. Ethanol, linalool, lilac alcohol, acetaldehyde, (E)-2-hexenal, benzaldehyde and dimethyl sulfide were the major volatiles, which were mainly responsible for the characteristic aroma of sweet cherry flowers. It was concluded that the VOCs of sweet cherry flowers were qualitatively similar; however, relative content differences were observed in the four cultivars. This study provides a theoretical basis for the metabolism and regulation of the VOCs of sweet cherry flowers.

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.

Bio-oil production via catalytic microwave pyrolysis of model municipal solid waste component mixtures

RSC Advances ◽  
2015 ◽  
Vol 5 (71) ◽  
pp. 57619-57631 ◽  
Author(s):  
Dadi V. Suriapparao ◽  
R. Vinu
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Energy Recovery ◽  
Oil Production ◽  
Microwave Pyrolysis ◽  
Microwave Assisted ◽  
Paraffin Oil ◽  
Bio Oil ◽  
Garden Waste

Microwave assisted co-pyrolysis of model MSW components such as cellulose, paraffin oil, garden waste and kitchen wastes reveals the potential to tailor the oil yields, their quality and energy recovery using different susceptors.

scholarly journals The Eco-Friendly Biochar and Valuable Bio-Oil from Caragana korshinskii: Pyrolysis Preparation, Characterization, and Adsorption Applications

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3391 ◽  
Author(s):  
Tongtong Wang ◽  
Hongtao Liu ◽  
Cuihua Duan ◽  
Rui Xu ◽  
Zhiqin Zhang ◽  
...  
Keyword(s):  
Pyrolysis Temperature ◽  
Mesoporous Structure ◽  
Gas Chromatography Mass Spectrometry ◽  
Batch Adsorption ◽  
Pyrolysis Process ◽  
X Ray ◽  
Adsorption Performance ◽  
Caragana Korshinskii ◽  
Bio Oil ◽  
By Products

Carbonization of biomass can prepare carbon materials with excellent properties. In order to explore the comprehensive utilization and recycling of Caragana korshinskii biomass, 15 kinds of Caragana korshinskii biochar (CB) were prepared by controlling the oxygen-limited pyrolysis process. Moreover, we pay attention to the dynamic changes of microstructure of CB and the by-products. The physicochemical properties of CB were characterized by Scanning Electron Microscope (SEM), BET-specific surface area (BET-SSA), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), and Gas chromatography-mass spectrometry (GC-MS). The optimal preparation technology was evaluated by batch adsorption application experiment of NO3−, and the pyrolysis mechanism was explored. The results showed that the pyrolysis temperature is the most important factor in the properties of CB. With the increase of temperature, the content of C, pH, mesoporous structure, BET-SSA of CB increased, the cation exchange capacity (CEC) decreased and then increased, but the yield and the content of O and N decreased. The CEC, pH, and BET-SSA of CB under each pyrolysis process were 16.64–81.4 cmol·kg−1, 6.65–8.99, and 13.52–133.49 m2·g−1, respectively. CB contains abundant functional groups and mesoporous structure. As the pyrolysis temperature and time increases, the bond valence structure of C 1s, Ca 2p, and O 1s is more stable, and the phase structure of CaCO3 is more obvious, where the aromaticity increases, and the polarity decreases. The CB prepared at 650 °C for 3 h presented the best adsorption performance, and the maximum theoretical adsorption capacity for NO3− reached 120.65 mg·g−1. The Langmuir model and pseudo-second-order model can well describe the isothermal and kinetics adsorption process of NO3−, respectively. Compared with other cellulose and lignin-based biomass materials, CB showed efficient adsorption performance of NO3− without complicated modification condition. The by-products contain bio-soil and tail gas, which are potential source of liquid fuel and chemical raw materials. Especially, the bio-oil of CB contains α-d-glucopyranose, which can be used in medical tests and medicines.

An efficient, sensitive and fast microextraction method followed by gas chromatography-mass spectrometry for the determination of polycyclic aromatic hydrocarbons in bread samples

2017 ◽  
Vol 9 (44) ◽  
pp. 6246-6253 ◽  
Author(s):  
Reza Rostampour ◽  
Mahdie Kamalabadi ◽  
Marzieh Kamankesh ◽  
Zahra Hadian ◽  
Sahar Jazaeri ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Gas Chromatography Mass Spectrometry ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Polycyclic Aromatic ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Microwave-assisted extraction and dispersive liquid–liquid microextraction (MAE–DLLME) coupled with GC-MS allowed the simultaneous determination of 16 polycyclic aromatic hydrocarbons (PAHs) in bread samples.

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