Article
Green & Sustainable Science & Technology
Rui Diao, Chu Wang, Zejun Luo, Xifeng Zhu
Summary: The study investigated the co-pyrolysis of walnut shells and bio-oil distillation residues to produce bio-oils, with analysis of the effect of lyophilization. The results showed that temperature and mass ratios significantly influenced the bio-oil yield and element distribution, leading to increased phenols in the bio-oils.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Analytical
Brenda J. Alvarez-Chavez, Stephane Godbout, Vijaya Raghavan
Summary: The study evaluates the impact of fractional condensation on the properties of pyrolytic oil by assessing the number of condensation stages and temperatures used in the bio-oil recovery process. It was found that using three condensation stages resulted in a 35% increase in condensation efficiency. Two fractions of bio-oil obtained at different condensing temperatures exhibited distinct moisture content and liquid yield. Additionally, a quantitative analysis of acids and furans in the third bio-oil fraction showed the presence of various acids, with butyric acid being the most abundant component.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
J. Xu, N. Brodu, L. Abdelouahed, B. Taouk
Summary: The storage stability of bio-oils obtained from beech wood intermediate pyrolysis was improved using a combination of three-stage condensation and an additional water extraction system. The physicochemical properties and composition of the bio-oil were studied during aging at different storage temperatures and times, revealing changes in chemical composition. The bio-oil stored at 4 degrees C and room temperature for 4 weeks showed relatively high stability, while the bio-oil stored at 50 degrees C experienced significant changes in chemical composition. The additional water extraction step improved the stability of the water-insoluble fractions, but the water-soluble fractions were not as stable as before extraction.
Article
Chemistry, Multidisciplinary
Alessandro Mati, Marco Buffi, Stefano Dell'Orco, Giacomo Lombardi, Pilar Maria Ruiz Ramiro, Sascha R. A. Kersten, David Chiaramonti
Summary: Fast pyrolysis of biomass is a sustainable alternative for fuel production, but bio-oil needs further upgrading. Fractional condensation is a complementary process to hydrotreatment or co-processing, separating and concentrating specific compounds from bio-oil.
APPLIED SCIENCES-BASEL
(2022)
Article
Agricultural Engineering
Haiqing Sui, Jingai Shao, Foster A. Agblevor, Yanhua Zhang, Xianhua Wang, Haiping Yang, Hanping Chen
Summary: This study investigates a multi-condenser system to separate pyrolytic vapors and produce bio-oils that are more resistant to aging. Bio-oil vapors from fast pyrolysis of cotton stalk were fractionated into four fractions using a fractional condensation system. The results demonstrate that the stability of the bio-oil was improved by effectively separating reactive aliphatic compounds, such as water rich organic acids, aldehydes, and ketones, from the other components. The study also found that the stability of bio-oil is influenced by active chemicals derived from fast pyrolysis and the aqueous acidic conditions because certain reactions require the presence of H+ as a catalyst. Additionally, the observation suggests that separating conventional bio-oils into different stages and concentrating the initial suspended solid particles (SS) in a certain fraction can suppress the presence of SS in bio-oils.
BIOMASS & BIOENERGY
(2023)
Article
Agricultural Engineering
J. Xu, N. Brodu, M. Mignot, B. Youssef, B. Taouk
Summary: The study proposes a method of producing phenol-rich wood pyrolysis bio-oil fractions using fractional condensation and water extraction methods. The polymerization process of model phenol acetaldehyde (MPA) resins, mimic resins, and bio-oil acetaldehyde (BOA) resins were studied. The results demonstrate the potential of treated bio-oil products to effectively replace commercial phenols.
BIOMASS & BIOENERGY
(2022)
Article
Thermodynamics
Erwei Leng, Ben He, Jingwei Chen, Gaoliang Liao, Yinjie Ma, Feng Zhang, Shuai Liu, E. Jiaqiang
Summary: By establishing regression prediction models, this study shows that the random forest algorithm is suitable for predicting three-phase product distribution and bio-oil heating value, with significant impacts from factors such as pyrolysis temperature, carbon, and hydrogen content.
Article
Polymer Science
Yiyang Li, Guanyan Li, Yafeng Yang, Xiangmeng Chen, Wanxi Peng, Hanyin Li
Summary: This study explores the potential of Staphylea holocarpa wood as a bio-oil and improves its production using nanocatalysts. The extract from S. holocarpa wood contains abundant chemical components that can be used in biomedicine, cosmetics, and biofuels, with broad industrial application prospects.
Article
Green & Sustainable Science & Technology
Shasha Liu, Gang Wu, Yi Gao, Bin Li, Yu Feng, Jianbin Zhou, Xun Hu, Yong Huang, Shu Zhang, Hong Zhang
Summary: The study showed that catalytic reaction with activated char could increase the relative content of phenolic substances in bio-oil and create more active sites. At higher temperatures, the content of aromatic hydrocarbons in bio-oil increased while oxygen-containing compounds (such as ketones, acids, aldehydes) decreased.
Article
Chemistry, Analytical
Hector Hernando, Gema Gomez-Pozuelo, Juan A. Botas, David P. Serrano
Summary: Fractional pyrolysis of lignocellulosic biomass was assessed as a method to in-situ speciate bio-oil components, showing potential for extracting valuable compounds or for catalytic upgrading. Selecting operational temperatures of 350 and 700 degrees C, the fractional thermal treatment of wheat straw and pine woodchips led to reduced bio-oil yield but improved properties, with significant differences observed in the bio-oil composition obtained at the two steps.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Analytical
Jiaxing Wang, Shuping Zhang, Minzi Chen, Yuheng Feng, Huiyan Zhang
Summary: Fast pyrolysis coupled with fractional condensation using CaO catalyst was investigated for the efficient utilization of food waste digestate and upgrading pyrolysis oil. The optimal fractional condensation temperature was determined for enriching nitrogen-containing components (NCCs), water, and phenols. The use of CaO suppressed water formation and increased the heating values of pyrolysis oil. The process led to a decrease in oxygen-containing compounds (OCCs) and enrichment of NCCs, particularly pyrroles, at low-temperature condensation stages.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Green & Sustainable Science & Technology
Chu Wang, Xinhua Yuan, Shanshan Li, Xifeng Zhu
Summary: The study conducted walnut shell pyrolysis liquefaction experiments with torrefaction pretreatment and fractional condensation to enrich phenolic compounds in bio-oil. Significant increment in lignin pyrolytic products was observed after high-temperature torrefaction. Fractional condensation further separated water and small molecular compounds, leading to improved phenolic content in the target bio-oil. Enrichment of detectable phenols from 2.7 wt% to 13.3 wt% was achieved, demonstrating enhanced economic efficiency.
Article
Energy & Fuels
Haipeng Liu, Haifeng Jiang, Jiaxing Song, Ling Zhang, Yu Zhang, Yuhang Li, Wenpeng Hong
Summary: This study synthesized a series of Co-Ce, Co-Fe, and Co-Mg composite metal catalysts and used them to produce furans and ketones from cellulose pyrolysis. The catalyst effectively promoted the depolymerization of cellulose and improved the oxygen transfer behavior. CO2 as a reaction medium influenced the carbon distribution of products, increasing syngas yield and promoting the formation of furans and ketones. These works provide an important pathway for the efficient preparation of furans and ketones from biomass pyrolysis.
Article
Energy & Fuels
Zengtong Deng, Syed Shatir A. Syed-Hassan, Yuanjing Chen, Long Jiang, Jun Xu, Song Hu, Sheng Su, Yi Wang, Jun Xiang
Summary: In this study, it was found that adding Ni/Al2O3 to bio-oil can inhibit the formation of coke during pyrolysis, especially at high temperatures. The catalytic cracking of small molecules enhances the formation of hydrogen radicals, promoting thermal decomposition and preventing coke formation.
Article
Energy & Fuels
J. Xu, N. Brodu, J. Wang, L. Abdelouahed, B. Taouk
Summary: The successful separation of target chemicals from beech wood pyrolytic bio-oil was achieved by combining fractional condensation and water extraction methods. The effects of different condenser temperatures on chemical distribution were studied, with emphasis on the key factors like polarity, boiling point, and water solubility. Water allowed for the recovery of sugars in the water-soluble fraction while keeping phenolics in the water-insoluble fraction.
JOURNAL OF THE ENERGY INSTITUTE
(2021)
Article
Green & Sustainable Science & Technology
Farai Chireshe, Francois-Xavier Collard, Johann F. Gorgens
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Thermodynamics
Abdul M. Petersen, Oseweuba Okoro, Farai Chireshe, Talia Moonsamy, Johann F. Gorgens
Summary: The study evaluated different process technologies for bioethanol production and their costs, with 1G ethanol from A-molasses being the most cost-effective option. Energy self-sufficiency for 3G ethanol reduced production costs but also decreased ethanol yields.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Applied
Abdul M. Petersen, Farai Chireshe, Oseweuba Okoro, Johann Gorgens, Johan Van Dyk
Summary: This study provides comprehensive comparisons of different refinery configurations for producing sustainable aviation fuels from bio-ethanol or Fischer-Tropsch bio-syncrude through techno-economic evaluations. It found that refining bio-ethanol into higher alkanes using the Hybrid Process was the most efficient, while scenarios with simpler configurations generally had lower efficiency and economic potential.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Thermodynamics
Abdul M. Petersen, Farai Chireshe, Johann F. Gorgens, Johan Van Dyk
Summary: The study evaluates the potential of producing sustainable aviation fuel from invasive alien plants and analyzes the economic models of gasification-Fischer-Tropsch scenarios and refining systems to determine minimum product prices and production costs.
Article
Chemistry, Analytical
Guanshuai Zhang, Shanjian Liu, Dongmei Bi, Zhisen He, Jia Liu, Yinjiao Liu
Summary: Hydrogen peroxide pretreatment was applied for fast pyrolysis of corn stalks, and it was found that the pretreatment effectively promoted lignin depolymerization and decreased the reaction activation energy. The pretreatment also increased the cellulose content and removed alkali and alkaline earth metals from the biomass. The pH of the hydrogen peroxide solution affected the removal of lignin and ash by the pretreatment, and the composition of bio-oil changed significantly, with a significant increase in the relative content of levoglucosan after pretreatment.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2024)
