scholarly journals Obtaining a diesel fuel component from liquid products of oxidative pyrolysis of wood

2021 ◽  
Vol 2094 (5) ◽  
pp. 052040
Author(s):  
F A Buryukin ◽  
V A Safin ◽  
S S Kositcyna
Keyword(s):  
Experimental Studies ◽  
Fuel Component ◽  
Industry Waste ◽  
Wood Processing ◽  
Wood Pyrolysis ◽  
Oxidative Pyrolysis ◽  
Motor Fuels ◽  
Urgent Task ◽  
Liquid Products ◽  
Main Components

Abstract Recycling and rational use of wood-processing industry waste is an urgent task for the economy and industry. On the basis of experimental studies on the oxidative pyrolysis of Siberian pine and Downy birch, a basic technological scheme for components of motor fuels obtaining is proposed. It is shown that the main components of liquid products of wood pyrolysis in water vapor are aromatic and saturated hydrocarbons, as well as oxygen-containing compounds that need to be hydrogenated.

Microbiological substantiation of application of phytopreparations in treatment of inflammatory periodontal diseases

2019 ◽  
Vol 24 (3) ◽  
pp. 196-202 ◽  
Author(s):  
S. A. Abdurakhmanova ◽  
G. S. Runova ◽  
M. S. Podporin ◽  
E. V. Tsareva ◽  
E. V. Ippolitov ◽  
...  
Keyword(s):  
Tooth Loss ◽  
Periodontal Diseases ◽  
Adult Population ◽  
Experimental Studies ◽  
Herbal Medicines ◽  
Growth Dynamics ◽  
Integrated Approach ◽  
Bacterial Populations ◽  
Streptococcus Constellatus ◽  
Urgent Task

Relevance: Inflammatory-destructive periodontal diseases are the most complicated and became the main cause of tooth loss in adult population. Herbal medicines have a variety of pharmacological properties, so the development and introduction of new forms for the treatment of inflammatory periodontal diseases is an urgent task today.Purpose – experimental evaluation of effectiveness of the use of herbal medicines “Tonzinal” and “CM-1” in relation to the priority periodontal pathogenes.Materials and methods: in experimental studies, the basis for the experiment was the system for the cultivation of microorganisms in real time – the Revers-Spinner RTS-1 bioreactor. With the priority strains of periodontitis pathogens, the study of the growth dynamics of the culture was carried out in several parallels.Results: herbal medicines “CM-1” and “Tonsinal” has a multilateral therapeutic effect, exerting a diverse influence on the key stages of development of such bacterial populations as Aggregatibacter actinomycetemcomitans, Streptococcus constellatus, Candida albicans.Conclusion: tan integrated approach in the treatment of patients with inflammatory periodontal diseases is promising and will contribute to a more prolonged remission and increase the effectiveness of treatment. 

Joint Thermal Treatment of Heavy Oil and Liquid Products of Fast Wood Pyrolysis for Producing Fuels and Chemicals

2017 ◽  
Vol 53 (5) ◽  
pp. 638-645 ◽  
Author(s):  
A. N. Grachev ◽  
M. A. Varfolomeev ◽  
D. A. Emel’yanov ◽  
S. A. Zabelkin ◽  
M. F. Gilfanov ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Heavy Oil ◽  
Wood Pyrolysis ◽  
Liquid Products ◽  
Fuels And Chemicals

scholarly journals Evaluation of the security of the scope of culture expert method

2019 ◽  
pp. 115-125
Author(s):  
Sergiy Kuchyn
Keyword(s):  
National Security ◽  
Security Policy ◽  
Rapid Development ◽  
Developed Countries ◽  
Practical Implementation ◽  
Security Culture ◽  
Urgent Task ◽  
Main Components ◽  
Weight Coefficients ◽  
Research Analysis

Introduction. Ensuring national security is an urgent task for modern Ukraine. The national culture and its infrastructure components are given special attention in developed countries. Achieving the pace of rapid development of the national economy is now an important scientific and practical task. Ensuring the security of the sphere of culture is one of the priority directions of state security policy. Methods. The following methods of scientific knowledge are used in the course of the research: analysis, synthesis, grouping, analytical method, forecast method, study of scientific and statistical sources, tabular method, expert method. Results. The article proposes an approach to assessing the level of security of the sphere of culture by the indices of macroeconomic and social and demographic security. The article has received a practical implementation of the approach to assessing the level of security of the sphere of culture by an expert method. The conducted research has allowed to reveal a state of safety of a sphere of culture. The weight coefficients of economic and social and demographic security indices are obtained. Discussion. The prospect of further exploration in this direction is to develop a method of the main components and comparative analysis to assess the level of national security and security of the sphere of culture. Keywords: macroeconomic, social and demographic, security, culture, expert method, algorithm, questionnaire.

scholarly journals WOOD COMPONENTS AS SOURCES OF PENTO-CONTAINING RAW MATERIALS FOR SYNTHESIS OF USEFUL COMPOUNDS, PRODUCTS AND REAGENTS

2021 ◽  
Vol 64 (3) ◽  
pp. 107-115
Author(s):  
Irina A. Chetvertneva ◽  
Oleg Kh. Karimov ◽  
Galina A. Teptereva ◽  
Natalia S. Tivas ◽  
Eldar M. Movsumzade ◽  
...  
Keyword(s):  
Raw Materials ◽  
Condensation Reaction ◽  
Agricultural Waste ◽  
Monomer Unit ◽  
Paper Industry ◽  
Raw Material ◽  
Chemical Transformations ◽  
Covalent Bonds ◽  
Industry Waste ◽  
Wood Processing

The paper considers the main components and products of wood processing, agricultural waste, pulp and paper industry waste and qualifies them as sources of pentose-containing resource-renewable domestic raw materials. The article describes in detail the structural components of wood as a natural polymer, which contains aromatic and carbohydrate parts. It is noted that these poly-mers are promising as raw materials for the production of useful chemical products. The role of lignin, cellolose and hemicellulose in the design of mechanical and structural properties of wood is considered. The article considers the features of the sulfonation reactions of the lignin monomer unit depending on the pH of the medium: acidic, neutral and alkaline. There are three main reac-tions that occur simultaneously with lignin in the process of wood delignification during sulfite cooking, such as the sulfonation reaction, the hydrolytic destruction reaction, and the condensation reaction. It is shown that the lignin-hemicellulose matrix contains three types of interconnected mesh structures: the lignin itself; a network of covalent bonds of lignin with hemicelluloses, and a network whose structure is obtained due to the hydrogen bond and the forces of the physical inter-action of lignin and hemicelluloses. The features of chemical transformations of the monomeric aromatic link of lignosulfonate – phenylpropane unit in the processes of wood delignification, the main chemical reactions of wood raw material delignification under the conditions of sulfite and neutral-sulfite brews are shown. The method of quantitative determination of monosaccharides in the composition of the carbohydrate part is proposed.

scholarly journals Experimental studies of hole drilling operations in stress-strain workpiecematerial

2018 ◽  
Vol 226 ◽  
pp. 01011
Author(s):  
Vadim V. Kuts ◽  
Mikhail S. Razumov ◽  
Aleksandr S. Byshkin
Keyword(s):  
Axial Force ◽  
Experimental Studies ◽  
Hole Drilling ◽  
Drilling Process ◽  
Stress Strain ◽  
Workpiece Material ◽  
South West ◽  
Urgent Task ◽  
Drilling Operations ◽  
Proportionality Limit

Drilling holes is one of the most common operations in the part production. Consequently, increasing the efficiency of this process is an urgent task. To improve the efficiency of the drilling process, the South- West University developed a method of drilling for pre-stressed and prestrained workpiece material, which requires a sample to be subjected to elastic strain under load not exceeding the proportionality limit of the workpiece material. That is, when the load is removed, the dimensions of the workpiece remain unchanged. The paper presents the experimental device designed to determine the axial force and torque when drilling holes in the stress-strain workpiece material. Multi-factor experiments were carried out to obtain empirical dependences of the axial force and torque arising in drilling holes in the stress-strain workpiecematerial on the process parameters.

Experimental Studies on Adherence Resistance of Thermally Sprayed Metallic Coatings

2014 ◽  
Vol 657 ◽  
pp. 271-275
Author(s):  
Iuliana Silvia Georgescu ◽  
Alin Marian Cazac ◽  
Elena Raluca Baciu ◽  
Costică Bejinariu ◽  
Constantin Baciu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Data Acquisition ◽  
Adhesion Strength ◽  
Deformation Process ◽  
Experimental Studies ◽  
Data Acquisition System ◽  
Strength Tests ◽  
Main Components ◽  
Sprayed Coating ◽  
Thermally Sprayed

The paper aims to determine, through experiments, the necessary force for detaching the deposited layer (SD) from the support layer (SB). The thermal sprayed coating was formed by successive deposition of two sub-layers, one for anchorage and the second for corrosion resistance. Shear adhesion strength tests were performed on a specialized stand, while force (Fad) and displacement (x) values were recorded with a data acquisition system. The variation curves, Fad = f (x), outline the evolution of the detachment process of the sprayed layer and the two main components of the deformation process: slip and breakage.

scholarly journals Study of Reliability for Main Components and Devices of Die-Cutting Presses for Packaging

2020 ◽  
Vol 19 (4) ◽  
pp. 320-328
Author(s):  
N. S. Kohnenko ◽  
I. I. Karpunin ◽  
V. V. Kuz'mich
Keyword(s):  
Failure Probability ◽  
High Performance ◽  
Residual Life ◽  
Operational Reliability ◽  
Operating Conditions ◽  
Single Type ◽  
Successful Operation ◽  
Urgent Task ◽  
Probabilistic Values ◽  
Main Components

A large variety of machine operating conditions leads to a difference in the wear rate even for their units being of the same type. Operational time terms of single-type units and machines are not the same, and therefore, numerical expressions of operational reliability will be probabilistic values. Incomplete restoration of original properties of a unit, a negligent repair, a poor maintenance usually lead to the fact that any of several parts independently one from another can determine reliability  of  a  machine  (a unit).  This is especially important  to  consider  when  manufacturing packaging in order to avoid rejects. The operational reliability of modern machines consisting of hundreds, and sometimes thousands of parts, wear processes of which are in a complex relationship,  depends on a number of factors. A study on reliability of main components and equipment devices is an urgent task. Successful operation of printing equipment is possible only if there is a clear organization of preventive work, ensuring preparation of printing machines for printing and post-printing processing. High-performance equipment, such as die-cutting presses, should be regularly inspected, adjusted and maintained in such a way as to obtain standard results at the output. The paper has studied reliability of main components and devices of die-cutting presses based on calculation of failure probability. Calculations have been carried out by analogy with the calculation of the probability of events in the fault tree. Failure diagrams of devices and units of die-cutting presses have been built in the paper. Based on the analysis of the failure probability for main components and devices, graphs of residual life for equipment operation on its life cycle have been constructed in the paper.

scholarly journals The influence of wood processing waste on the technical and energy characteristics of the Maikuben coal-based mixed fuels

2021 ◽  
Vol 2057 (1) ◽  
pp. 012128
Author(s):  
G V Kuznetsov ◽  
I V Cherednik ◽  
A A Galaktionova ◽  
S A Yankovsky
Keyword(s):  
Experimental Studies ◽  
Calorific Value ◽  
Wood Biomass ◽  
Processing Waste ◽  
Energy Characteristics ◽  
Mixed Fuel ◽  
Pine Sawdust ◽  
Wood Processing ◽  
Moderate Reduction ◽  
The Republic

Abstract The manuscript presents the results of experimental studies of the energy and technical characteristics of mixed fuels based on lignite from the Maikuben basin of the Republic of Kazakhstan and wood processing waste, pine sawdust from the Tomsk LPC. The addition of wood biomass to coal is found to result in a significant reduction in the ash content of the mixed fuel (by 73.1 %) with a wood fraction equal to 50 % and a moderate reduction in calorific value (by 8.2 %) with the same concentration of biomass in the mixed fuel.

scholarly journals Algorithm Analysis and Assessment of the Information Objects in Adaptive Systems

2021 ◽  
Vol 2096 (1) ◽  
pp. 012028
Author(s):  
A Obukhov ◽  
A Volkov
Keyword(s):  
Adaptive Systems ◽  
Complex Structure ◽  
The State ◽  
Assessment Process ◽  
Algorithm Analysis ◽  
Information Object ◽  
Urgent Task ◽  
Speed Up ◽  
Main Components ◽  
Information Objects

Abstract Analysis and assessment of the state of information objects is an urgent task in adaptive systems. Information about the current state of the system, its constituent components, the object of observation can be used in the decision-making process or in the implementation of control algorithms. However, an information object can have a complex structure or be characterized by many features, among which it is difficult to distinguish the main components. Therefore, an algorithm for analyzing and assessing the state of information objects is proposed, based on obtaining the compressed state of objects using neural networks. The resulting compressed state sufficiently characterizes the original object, but has a lower dimension. This can be used to speed up the analysis and assessment process and improve its accuracy in adaptive systems.

scholarly journals Analysis of the mixing efficiency of the components of the iron-phosphate mixture in the dry state

2021 ◽  
Vol 1,2021 (1,2021(126)) ◽  
pp. 23-27
Author(s):  
Selyverstov Vadim ◽  
Dotsenko Yurii
Keyword(s):  
Mixing Time ◽  
Experimental Studies ◽  
Iron Phosphate ◽  
Original Method ◽  
Cold Hardening ◽  
Mixing Efficiency ◽  
Experiment Research ◽  
Metal Component ◽  
Dispersed Particles ◽  
Urgent Task

The results of researches of influence of time of mixing of initial components in a dry condition on degree of assimilation of iron-containing component of forming and core iron-phosphate cold-hardening mixes are presented. The percentage of assimilation of the dispersed iron-containing component after each minute of mixing in laboratory runners with a total mixing time of 15 minutes was determined experimentally. Using the original method of particle separation, under the microscope were separated scale particles that were not assimilated (not distributed on the surface of the sand), and weighed them. The dependences of the degree of assimilation of the metal component of the iron-phosphate mixture on the mixing time at different initial contents are obtained. It is shown that the highest degree of absorption of the iron-containing component of iron-phosphate mixtures is achieved by mixing the components of the mixture for the first four to five minutes. Then this figure begins to decrease as the grains begin to collapse under the action of the rolls of the runners, and the forces of electrostatic interaction between the surfaces of the grains and the dispersion medium are reduced compared to the forces of mutual gravity between the dispersed particles of iron-containing component of the mixture. Based on the analysis of theoretical positions and the results of experimental studies, the assumption is made about the possibility of adjusting the conditions and parameters of solidification of phosphate binder systems, in particular using iron-containing filler of a certain dispersion and mixing the components in the dry state for some time. It is known that for mixing the components and assimilation of the required part of the iron-containing component of the mixture uses a significant amount of energy (depending on the type of unit used). To reduce the energy consumption of this process, the urgent task is to determine the degree of assimilation of the iron-containing component of phosphate cold-hardening mixtures in their manufacture by mixing the components in the dry state. Keywords: iron-phosphate cold-hardening mixture, mixing in the dry state, interaction, adhesion, experiment, research, dependence

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