Thermal Conversion of Flax Shives in Sub- and Supercritical Ethanol in the Presence of Ru/C Catalyst

Kazachenko, Аleksandr S.; Miroshnikova, Angelina V.; Tarabanko, Valery E.; Skripnikov, Andrey M.; Malyar, Yuriy N.; Borovkova, Valentina S.; Sychev, Valentin V.; Taran, Oxana P.

doi:10.3390/catal11080970

Cited by 20 publications

(15 citation statements)

References 33 publications

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“…The scientific community is constantly on the lookout to find alternative energy sources due to the trend in decreasing fossil energy consumption and increasing environmental pollution [ 1 , 2 , 3 ]. Researchers have been very interested in biomass resources due to their green, renewable, and clean attributes.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Efficiency of Chemical and Thermochemical Depolymerization Methods for Lignin Valorization: Principal Component Analysis (PCA) Approach

et al. 2022

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Energy demand and the use of commodity consumer products, such as chemicals, plastics, and transportation fuels, are growing nowadays. These products, which are mainly derived from fossil resources and contribute to environmental pollution and CO2 emissions, will be used up eventually. Therefore, a renewable inexhaustible energy source is required. Plant biomass resources can be used as a suitable alternative source due to their green, clean attributes and low carbon emissions. Lignin is a class of complex aromatic polymers. It is highly abundant and a major constituent in the structural cell walls of all higher vascular land plants. Lignin can be used as an alternative source for fine chemicals and raw material for biofuel production. There are many chemical processes that can be potentially utilized to increase the degradation rate of lignin into biofuels or value-added chemicals. In this study, two lignin degradation methods, CuO–NaOH oxidation and tetramethyl ammonium hydroxide (TMAH) thermochemolysis, will be addressed. Both methods showed a high capacity to produce a large molecular dataset, resulting in tedious and time-consuming data analysis. To overcome this issue, an unsupervised machine learning technique called principal component analysis (PCA) is implemented.

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Section: Introductionmentioning

confidence: 99%

“…Researchers have been very interested in biomass resources due to their green, renewable, and clean attributes. Lignin is a component of biomass resources that contains aromatic rings [ 1 , 2 , 3 ]. Lignin has versatile applications in many areas, including chemical engineering, materials, and food.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Efficiency of Chemical and Thermochemical Depolymerization Methods for Lignin Valorization: Principal Component Analysis (PCA) Approach

et al. 2022

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“…The model of a circular economy and the European Union's policy on biomass energy use are parts of the overall research and technological development strategy in Europe. Intensive research and development work is focused on new methods of processing biomass into components for motor fuels and chemicals [1][2][3][4][5][6]. Biogas, which is a by-product of the biological decomposition of organic substances under anaerobic conditions, belongs to the important renewable energy sources (RES) [1,7,8].…”

Section: Introductionmentioning

confidence: 99%

Upgrading Biogas from Small Agricultural Sources into Biomethane by Membrane Separation

2021

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The agriculture sector in Poland could provide 7.8 billion m3 of biogas per year, but this potential would be from dispersed plants of a low capacity. In the current study, a membrane process was investigated for the upgrading biogas to biomethane that conforms to the requirements for grid gas in Poland. It was assumed that such a process is based on membranes made from modified polysulfone or polyimide, available in the market in Air Products PRISM PA1020 and UBE UMS-A5 modules, respectively. The case study has served an agricultural biogas plant in southern Poland, which provides the stream of 5 m3 (STP) h−1 of biogas with a composition of CH4 (52 vol.%), CO2 (46.3 vol.%), N2 (1.6 vol.%) and O2 (0.1 vol.%), after a pretreatment. It was theoretically shown that this is possible to obtain the biomethane stream of at least 96 vol.% of CH4 purity, with the concentration of the other biogas components below their respective thresholds, as required in Poland for gas fuel “E”, with methane recovery of up to 87.5% and 71.6% for polyimide and polysulfone membranes, respectively. The energetic efficiency of the separation process is comparable for both membrane materials, as expressed by power excess index, which reaches up to 51.3 kWth kWel−1 (polyimide) and 40.7 kWth kWel−1 (polysulfone). In turn, the membrane productivity was significantly higher in the case of the polyimide membrane (up to 38.3 kWth m−2) than those based on the polysulfone one (up to 3.13 kWth m−2).

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“…Two articles of the Issue are devoted to the study of processing agricultural waste, flax shives, by hydrogenation methods [8,9]. Thermal conversion of flax shives in ethanol with and without molecular hydrogen was studied in the presence of the bifunctional ruthenium catalyst on carbon support.…”

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confidence: 99%

“…Analysis of the molecular weight distribution of liquid products showed that using the catalyst, as well as molecular hydrogen, leads to shifting the molecular weight distribution towards low molecular weight products. The most promising individual compound of the process is guaiacylpropane [8,9].…”

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confidence: 99%

Catalytic Conversion of Lignins for Valuable Chemicals

Tarabanko

2021

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Thermal Conversion of Flax Shives in Sub- and Supercritical Ethanol in the Presence of Ru/C Catalyst

Cited by 20 publications

References 33 publications

Assessment of the Efficiency of Chemical and Thermochemical Depolymerization Methods for Lignin Valorization: Principal Component Analysis (PCA) Approach

Assessment of the Efficiency of Chemical and Thermochemical Depolymerization Methods for Lignin Valorization: Principal Component Analysis (PCA) Approach

Upgrading Biogas from Small Agricultural Sources into Biomethane by Membrane Separation

Catalytic Conversion of Lignins for Valuable Chemicals

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