Journal of the Korean Society of Mineral and Energy Resources Engineers最新文献_第9页

Detection of Boundary between Pulp and Froth in Flotation Process Using the Measurement of Electrical Resistance 用电阻测量法检测浮选过程中矿浆与泡沫边界

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-04-30 DOI: 10.32390/ksmer.2022.59.2.182

Yun-Ho Seo, Kwanho Kim, Kwang-suk You

引用次数: 0

Development of 4D Seismic Monitoring Tool Considering Anisotropic Media based on Pseudo-acoustic Wave Equation 基于伪声波方程的考虑各向异性介质的四维地震监测工具研制

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-04-30 DOI: 10.32390/ksmer.2022.59.2.161

Seok-Han Kim, Hee-Chan Noh, Sea-Eun Park, Ju-Won Oh, D. Min

引用次数: 0

Current Status in the Mining Industry of Critical Minerals for Battery (Li, Ni, Co, and C) in the Energy Transition Era 能源转型时代电池关键矿产(锂、镍、钴、碳)采矿业现状

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-04-30 DOI: 10.32390/ksmer.2022.59.2.218

R. Kim, Jaewook Lee, Junhyeok Park, S. Shin, I. Park, K. Chung, Jeong‐Hyun Yoo, S. Kim, Seong-Jun Cho, Hoseok Jeon, Han-Chun Chang

{"title":"Current Status in the Mining Industry of Critical Minerals for Battery (Li, Ni, Co, and C) in the Energy Transition Era","authors":"R. Kim, Jaewook Lee, Junhyeok Park, S. Shin, I. Park, K. Chung, Jeong‐Hyun Yoo, S. Kim, Seong-Jun Cho, Hoseok Jeon, Han-Chun Chang","doi":"10.32390/ksmer.2022.59.2.218","DOIUrl":"https://doi.org/10.32390/ksmer.2022.59.2.218","url":null,"abstract":"As the energy transition era begins, securing minerals is becoming critical, and countries worldwide are highly interested in “critical minerals,” which have a supply risk associated with them. Major countries have newly prepared or updated the list of critical minerals, where battery minerals such as lithium, nickel, cobalt, and graphite typically find a place. The demand for these four critical minerals is expected to increase 3 to 42 folds by 2040 in comparison to 2020 owing to the increasing demand for eco-friendly vehicles and energy storage systems. Recently, the supply risk of the four minerals has increased significantly, as commercial products manufactured using these minerals are generally produced in a specific country; furthermore, the prices of the minerals are constantly increasing. In this study, the current status of the production, markets, and relevant technologies of the four critical minerals was investigated, and some recommendations for securing them were presented.","PeriodicalId":17454,"journal":{"name":"Journal of the Korean Society of Mineral and Energy Resources Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91549100","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: 5

A Study on Preparation of Nano Iron Oxides-Based Metal Biochar Using Co-Pyrolysis in a CO2 Environment and Adsorption of Cr(VI) CO2环境下共热解制备纳米氧化铁金属生物炭及吸附Cr(VI)的研究

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-04-30 DOI: 10.32390/ksmer.2022.59.2.127

Jeong-Yun Jang, Sun Joon Kim

{"title":"A Study on Preparation of Nano Iron Oxides-Based Metal Biochar Using Co-Pyrolysis in a CO2 Environment and Adsorption of Cr(VI)","authors":"Jeong-Yun Jang, Sun Joon Kim","doi":"10.32390/ksmer.2022.59.2.127","DOIUrl":"https://doi.org/10.32390/ksmer.2022.59.2.127","url":null,"abstract":"This study explored the effects of blending nano iron (III) oxides (NIO) with coffee grounds (CG) in a pyrolytic process under a CO 2 environment on the generation of syngas (H 2 and CO) and biochar properties regarding the removal of Cr(VI) from aqueous solutions. CG and NIO were physically mixed; CG was mass maintained at 1 g while NIO was added. Based on the mass ratio, the resulting solution was named NICG1(NIO/CG ratio=1:1). Compared with the generation amounts of syngas (0.37 mole% H 2 & 0.28 mole% CO) at 650°C from single pyrolysis of CG, co-pyrolysis with NIO-based additives resulted in increased production of syngas, with the measured concentrations of H 2 and CO reaching 0.99 mole% and 0.86 mole% at the same temperature, respectively. During the pH effect experiments, NICG1 demonstrated the highest removal efficiency under acidic conditions with pH = 2. Adsorption kinetic experiments demonstrated that the pseudo-second-order rate model was suitable for assessing the removal of Cr(VI) by NICG1. Furthermore, the removal of Cr(VI) using NICG1 fitted well with the Freundlich isothernm adsorption model (R 2 = 0.9807). In conclusion, co-pyrolysis of blending nano iron(III) oxide and coffee grounds can be considered an efficient resource for simultaneously producing syngas (H 2 and CO) as a fuel (energy resource) and metal-biochar as an adsorbent.","PeriodicalId":17454,"journal":{"name":"Journal of the Korean Society of Mineral and Energy Resources Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78607349","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

Seismic Velocity Modeling Building Using Depthwise Separable Convolutional Neural Network 用深度可分卷积神经网络建立地震速度模型

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-04-30 DOI: 10.32390/ksmer.2022.59.2.148

J. Jo, W. Ha

{"title":"Seismic Velocity Modeling Building Using Depthwise Separable Convolutional Neural Network","authors":"J. Jo, W. Ha","doi":"10.32390/ksmer.2022.59.2.148","DOIUrl":"https://doi.org/10.32390/ksmer.2022.59.2.148","url":null,"abstract":"The construction of an accurate velocity model is one of the most important tasks in seismic data processing for hydrocarbon exploration. Because deep neural networks have garnered significant attention in the field of geophysics recently, studies have been performed to predict velocity models using regular convolutional neural networks. Herein, we propose a neural network with depthwise separable convolutional layers and an encoder – decoder structure to construct a velocity model. This network is trained using a supervised learning approach, and we predict P-wave velocity models from time-domain wavefields. In this network structure, depthwise separable convolutions perform spatial-oriented convolutions independently for each input channel. These depthwise separable convolutions can improve network performance while significantly reducing the number of model parameters as compared with regular convolutions. Synthetic velocity models generated for training contain various geological features, including folds, faults, and salt-dome structures. We compare a network with depthwise separable convolutions and a network with regular convolutions based on the same training conditions and hyperparameters. Experiments demonstrate that the network with depthwise separable convolutions is more efficient than the network with regular convolutions for constructing a seismic velocity model.","PeriodicalId":17454,"journal":{"name":"Journal of the Korean Society of Mineral and Energy Resources Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74307136","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: 1

Seismic Interferometry: Research Trends and Technological Introduction 地震干涉测量:研究趋势与技术介绍

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-04-30 DOI: 10.32390/ksmer.2022.59.2.205

Inseok Joung, Ahyun Cho, Hanna Jang, Bitnarae Kim, C. Cho, M. Nam

引用次数: 0

Synthesis and Dispersion Stability Test of Seawater-based Nano-Smart Fluids 海水基纳米智能流体的合成及分散稳定性试验

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-02-28 DOI: 10.32390/ksmer.2022.59.1.091

Jihwan Kim, Jong-Seop Lee

引用次数: 1

Elucidation of the Effect of Functional Group Substitution of BN-cyclohexane for Renewable Energy Hydrogen Storage: Density Functional Theory Approach bn -环己烷官能团取代对可再生能源储氢效果的阐释:密度泛函理论方法

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-02-28 DOI: 10.32390/ksmer.2022.59.1.021

Govindaraja Senthamaraikannan Thillai, Dong-Hee Lim

{"title":"Elucidation of the Effect of Functional Group Substitution of BN-cyclohexane for Renewable Energy Hydrogen Storage: Density Functional Theory Approach","authors":"Govindaraja Senthamaraikannan Thillai, Dong-Hee Lim","doi":"10.32390/ksmer.2022.59.1.021","DOIUrl":"https://doi.org/10.32390/ksmer.2022.59.1.021","url":null,"abstract":"Liquid organic hydrogen carrier (LOHC) has been attracting attention as a hydrogen storage technology. Among the LOHC materials, we explore fluorine (F) and amine (NH2) functional group substituted 1,2-BN cyclohexane-based hydrogen storage materials with improved reversibility of dehydrogenation-hydrogenation reaction. Density functional theory (DFT) calculations were conducted by using Gaussian 16 software to calculate dehydrogenation reaction enthalpy (∆) and reaction free energy (∆). F-BN-cyclohexane and NH2-BN-cyclohexane show ∆ of ‒4.10 and ‒5.38 kJ/mol, respectively, whereas 1,2-BN cyclohexane shows ∆ of ‒5.71 kJ/mol. Because the reversibility of dehydrogenation-hydrogenation reactions is excellent as the ∆ value is close to zero, the functional group substitution enhanced the reversibility of the dehydrogenation-hydrogenation reaction. This DFT study not only presents a systematic methodology to evaluate the dehydrogenation-hydrogenation reaction reversibility that can be improved by substituting F and NH2 functional groups in existing BN-cyclohexane, but also provides the fundamental mechanisms of dehydrogenation of Fand NH2-BN-cyclohexane.","PeriodicalId":17454,"journal":{"name":"Journal of the Korean Society of Mineral and Energy Resources Engineers","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82251867","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

Physical Separation of Heavy Metals in Contaminated Soil Simulant near Abandoned Metal Mines 废弃金属矿山污染土壤模拟物中重金属物理分离研究

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-02-28 DOI: 10.32390/ksmer.2022.59.1.001

D. Jeong, J. Cha

引用次数: 0

Stability Analysis of Pillar in Underground Limestone Mine Using 3D Scanning Techniques 基于三维扫描技术的地下石灰岩矿柱稳定性分析

Journal of the Korean Society of Mineral and Energy Resources Engineers Pub Date : 2022-02-28 DOI: 10.32390/ksmer.2022.59.1.010

Donghui Kim, Gyoungman Kim, H. Baek

引用次数: 0