Bulletin of the Saint Petersburg State Institute of Technology (Technical University)最新文献_第7页

CFD MODELING OF FLOW IN A STATIONARY ADSORBENT BED FOR PRESSURE SWING ADSORPTION PROCESS OF HYDROGEN PURIFICATION 变压吸附床内氢气净化过程的CFD模拟

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-61-87-92-97

O. Golubyatnikov, E. Akulinin, Alexey A. Kolomoets

{"title":"CFD MODELING OF FLOW IN A STATIONARY ADSORBENT BED FOR PRESSURE SWING ADSORPTION PROCESS OF HYDROGEN PURIFICATION","authors":"O. Golubyatnikov, E. Akulinin, Alexey A. Kolomoets","doi":"10.36807/1998-9849-2022-61-87-92-97","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-61-87-92-97","url":null,"abstract":"The paper presents the results of numerical studies of the aerodynamic structure of the flow in a fixed layer of granular adsorbent in the adsorber of a pressure swing adsorption (PSA) unit for synthesis gas separation and hydrogen purification. Сomputational experiments were conducted in COMSOL Multiphysics software using 1-D and 2-D mathematical models to calculate the velocity field in the bulk layer of the 13X adsorbent for the PSA process of hydrogen purification. When assessing the accuracy of calculating the aerodynamic structure of the gas flow in the adsorbent, it was found that the use of a 2-D mathematical model provides an increase in the accuracy of calculations by an average of ~ 1-2% compared with the 1-D model. It is determined that when using an adsorbent with a particle diameter of more than 2 mm in the PSA unit, the use of 2-D and 3-D mathematical models for calculations is promising at speeds of more than 0.3 m/s, due to an increase in the velocity divergence in the center of the vertical cylindrical adsorber and on its walls","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"275 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83189215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

APPLICATION OF DIFFERENT MODIFICATIONS OF CRYSTALLINE STRUCTURES OF MANGANESE DIOXIDE IN TECHNOLOGICAL PROCESSES 不同改性二氧化锰晶体结构在工艺过程中的应用

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-63-89-58-64

D. A. Novikova, O. M. Flisyuk, N. A. Martsulevich, I. G. Likhachev

引用次数: 0

PROSPECTS OF THE USAGE OF SILICATE WASTE IN VANADIUM CATALYST TECHNOLOGY 硅酸盐废弃物在钒催化剂技术中的应用前景

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-63-89-3-8

A. Y. Postnov, S. A. Lavrishcheva, O. I. Kopylova, J. V. Alexandrova

引用次数: 0

EVALUATION OF THE CARBON MATERIAL SURFACE BY CAPACITIVE MEASUREMENTS OF A DOUBLE-LAYER SUPERCAPACITOR 用双层超级电容器的电容性测量评价碳材料表面

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-63-89-23-27

Igor V. Yesarev, Yu. V. Surovikin, D. Agafonov

{"title":"EVALUATION OF THE CARBON MATERIAL SURFACE BY CAPACITIVE MEASUREMENTS OF A DOUBLE-LAYER SUPERCAPACITOR","authors":"Igor V. Yesarev, Yu. V. Surovikin, D. Agafonov","doi":"10.36807/1998-9849-2022-63-89-23-27","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-63-89-23-27","url":null,"abstract":"The paper considers the possibility of calculating the surface of carbon materials by measuring the capacitance of symmetric supercapacitors. It is shown that this approach allows us to obtain results that are in good agreement with the BET method. Traditional carbon materials for symmetric supercapacitors - activated carbons and carbon composites based on carbon black - are considered and compared. The capacitances of supercapacitors at different charge rates were measured in the work. When using the exponential model for almost all samples, the values of the maximum possible specific area of the sorbed ions are close to the specific surface of the materials calculated by the BET method. The exception is SX1G, for which a twofold difference between the values of specific areas is observed. This difference may be due to the non-equipotential, mostly microporous structure of the material, which is difficult for large solvated cations. Based on the experimental data obtained, it was suggested that it is possible to estimate the specific surface area of carbon materials based on the calculated capacitance. An important conclusion for practice is made - the limit of supercapacitor capacity growth is reached for materials with a specific surface area of 1500 m2/g","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80587549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ELECTROPHYSICAL INTENSIFICATION AND SIMULATION OF GRINDING AND MIXING OF INORGANIC MATERIALS 无机材料研磨与混合的电物理强化与模拟

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-60-86-18-22

Andrey A. Panferov, G. K. Ivakhnyuk, Nikolay F. Fedorov, Tazhir E. Mametnabiev, A. S. Drinberg

{"title":"ELECTROPHYSICAL INTENSIFICATION AND SIMULATION OF GRINDING AND MIXING OF INORGANIC MATERIALS","authors":"Andrey A. Panferov, G. K. Ivakhnyuk, Nikolay F. Fedorov, Tazhir E. Mametnabiev, A. S. Drinberg","doi":"10.36807/1998-9849-2022-60-86-18-22","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-60-86-18-22","url":null,"abstract":"The working hypothesis previously confirmed at Phosphorit JSC (Kingisepp, Leningrad Region) on the significant effect of static electricity on the efficiency of grinding in cement clinker ball mills was successfully tested at the cement production. The method of electrophysical neutralization of static electricity charges has opened up the possibility not only to increase the productivity of grinders (by 12-18% wt.) or save energy for the electric drive (up to 20% rel.), but also made it possible to obtain homogeneous mixtures of dispersed inorganic powders, for example, a clinker encryption preparation, for example, when clinker is charged with sludge incineration ash. The homogeneity of such mixtures experimentally confirms the validity of the proposed mathematical model of the mixing process. The resulting dry mixtures showed the practical invariability of the mechanical strength of the cement stone based on them. The saving of the main binder-clinker was up to 15 wt. %, thus solving the problem of sludge incineration ash utilization","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84855193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DETERMINATION OF THE OPTIMAL MODES OF OPERATION OF ELECTROCHROMIC DEVICES 电致变色器件最佳工作模式的确定

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-61-87-39-43

S. Lebedev

{"title":"DETERMINATION OF THE OPTIMAL MODES OF OPERATION OF ELECTROCHROMIC DEVICES","authors":"S. Lebedev","doi":"10.36807/1998-9849-2022-61-87-39-43","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-61-87-39-43","url":null,"abstract":"Every year, the production volume of electrochromic devices steadily grows; the growth is associated with the spread of energy-saving technologies in many developed countries of the world. These electrochemical products are highly demanded and competitive, but the problems associated with their operation remain unresolved. The aim of the work was to increase the service life of electrochromic devices by determining the optimal ranges of their operation. A new operational evaluation parameter was considered – electrochromic productivity, based on the correlation of optical transmission and consumed electrical energy; the parameter makes it possible to take into account the influence of side uncontrolled processes unrelated to the electrochromic effect. The studies were carried out using the method of multi-stage electrical control actions developed by us. The optimal ranges for the functioning of ECD samples – made using different technologies –were determined; the ranges were from 100% to 40% of light transmission relating to the initial state. The electrochromic productivity for the inorganic technology was 4.8%∙cm2/(mW∙s), and for the organic technology it was 8.0%∙cm2/(mW∙s).","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85637631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IDENTIFICATION OF THE PHARMACOLOGICAL PROPERTIES OF A CHEMICAL COMPOUND ON THE BASIS OF PREDICTING THE RESULTS OF PRECLINICAL LABORATORY TESTS 在预测临床前实验室试验结果的基础上鉴定化合物的药理学性质

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-62-88-66-75

V. Loshmanov, A. Kravets

引用次数: 0

"NEUTRALIZATION" OF REACTOR GRAPHITE: PROBLEMS AND SOLUTIONS 反应器石墨的“中和”:问题与解决方法

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-61-87-22-26

Alexander F. Alexander F., V. Vinnitskii

引用次数: 0

DEVELOPMENT OF TECHNICAL SOLUTIONS FOR THE PRODUCTION OF HYBRID FERTILIZERS FROM PHOSPHOGYPSUM 磷石膏生产杂交肥料技术方案的开发

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-60-86-23-27

V. Lipin, Teodor G. Milberger, E. Gorbachev, D. M. Shapot, Sergey N. Akhmedov

引用次数: 0

EFFECT OF AN INCREASE IN THE SODIUM AND LITHIUM OXIDES CONTENT ON THE PROCESS OF CRYSTALLIZATION OF GLASSES IN THE Li2O–Al2O3–SiO2 SYSTEM 在Li2O-Al2O3-SiO2体系中，钠和锂氧化物含量的增加对玻璃结晶过程的影响

Bulletin of the Saint Petersburg State Institute of Technology (Technical University) Pub Date : 2022-01-01 DOI: 10.36807/1998-9849-2022-60-86-3-6

F. al-Saeedi

引用次数: 0