International Journal of Energy, Environment and Economics最新文献_第3页

Effects of Parameters on Solvent Extraction of Oil From Sandbox (Hura Crepitans) Seed Oil Using 2^4 Factorial Design 用2^4析因设计研究各参数对沙盒种籽油溶剂提取的影响

International Journal of Energy, Environment and Economics Pub Date : 2021-04-13 DOI: 10.46300/91012.2021.15.9

Owhor Sampson Chisa, J. D. Ami̇ne, Abdul Gambo Alim, Luka Bobby Shakarau, Isaiah Kehinde Ogbobame, Samaila Yohanna Adidauki

{"title":"Effects of Parameters on Solvent Extraction of Oil From Sandbox (Hura Crepitans) Seed Oil Using 2^4 Factorial Design","authors":"Owhor Sampson Chisa, J. D. Ami̇ne, Abdul Gambo Alim, Luka Bobby Shakarau, Isaiah Kehinde Ogbobame, Samaila Yohanna Adidauki","doi":"10.46300/91012.2021.15.9","DOIUrl":"https://doi.org/10.46300/91012.2021.15.9","url":null,"abstract":"The present work deals with the production of biodiesel from Sandbox (Hura crepitans) seed oil and the optimization of the parameters that influence the transesterification of Sandbox (Hura crepitans)seed oil into biodiesel using Response Surface Methodology. Hura crepitans oil was obtained from by using hydraulic press for Mechanical and n-hexane for solvent extraction. Esterification was done using methanol and sodium hydroxide. A total of 48 experiments using Central Composite Design were carried out. The R-Squared, Adequate Precision, Predicted and Adjusted R-Squared values were 0.9367, 19.219, 0.8576 and 0.9070 respectively. The result of the extraction of oil, physiochemical properties, and optimization process shows that sandbox (Hura crepitans) seed oil has characteristics that are more favorable to biodiesel production. The optimal conditions for extraction of oil from sandbox seed oil were given as alcohol/ oil ratio of 5.0, catalyst amount of 20 g/ml, extraction temperature of 60 ºC, and extraction time of 45.01 minutes, with the predicted oil yield as 97.33% respectively which shows that the experimental values are in good agreement with predicted values.","PeriodicalId":39336,"journal":{"name":"International Journal of Energy, Environment and Economics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85475278","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

The Impact of Climate Change on Farm Business Performance in Western Australia. Understanding Farmer’s Adaptation Responses and Their Key Characteristics in Response to a Changing and Variable Climate 气候变化对西澳大利亚州农场经营绩效的影响。了解农民对气候变化的适应反应及其关键特征

International Journal of Energy, Environment and Economics Pub Date : 2021-03-24 DOI: 10.46300/91012.2021.15.6

L. Anderton, R. Kingwell, D. Feldman, J. Speijers, N. Islam, V. Xayavong, A. Wardell-Johnson

{"title":"The Impact of Climate Change on Farm Business Performance in Western Australia. Understanding Farmer’s Adaptation Responses and Their Key Characteristics in Response to a Changing and Variable Climate","authors":"L. Anderton, R. Kingwell, D. Feldman, J. Speijers, N. Islam, V. Xayavong, A. Wardell-Johnson","doi":"10.46300/91012.2021.15.6","DOIUrl":"https://doi.org/10.46300/91012.2021.15.6","url":null,"abstract":"This study examines ten years of financial and production data of 249 farm businesses operating in southwestern Australia. It also identifies the behavioural characteristics of the farm operators through a comprehensive socio-managerial survey of each farm business. The study area has a Mediterranean climate, where three quarters of the rainfall is received during the growing season from April and October. Growers have learned to produce 2 tonnes per hectare of wheat on less than 200 ml of growing season rainfall. Australia is the driest continent in the world and is renowned for its climate variability. In addition, evidence is emerging that its southern parts, like south-western Australia, are experiencing a warming, drying trend in their climate. Average annual rainfall over the last thirty years in the study area has declined and average minimum and maximum temperatures have risen. Moreover, in the last ten years a number of droughts have occurred. This multidisciplinary study examines the business performance of 249 farms from 2002 to 2011 and identifies the strategies farm managers have adopted to adapt to a drying, warming environment. Farms are categorised according to their performance. Their characteristics are compared and contrasted. We find many significant differences between farm performance categories and the adaptation strategies used by the farmers in each category. There are also different socio-managerial and behavioural characteristics between the groups of farmers identified.","PeriodicalId":39336,"journal":{"name":"International Journal of Energy, Environment and Economics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76862224","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

Air Quality in East Asia during the heavy haze event period of 10 to 15 January 2013 2013年1月10日至15日东亚地区重霾事件期间的空气质量

International Journal of Energy, Environment and Economics Pub Date : 2021-03-24 DOI: 10.46300/91012.2021.15.1

Soon-Ung Park, J. Cho

{"title":"Air Quality in East Asia during the heavy haze event period of 10 to 15 January 2013","authors":"Soon-Ung Park, J. Cho","doi":"10.46300/91012.2021.15.1","DOIUrl":"https://doi.org/10.46300/91012.2021.15.1","url":null,"abstract":"A prolonged heavy haze event that has caused for the Environmental Protection Bureau (EPB) in Beijing to take emergency measures for the protection of the public health and the reduction of air pollution damages in China has been analyzed with the use of the Aerosol modeling System (AMS) to identify causes of this event. It is found that the heavy haze event is associated with high aerosols and water droplets concentrations. These high aerosol concentrations are mainly composed of anthropogenic aerosols, especially secondary inorganic aerosols formed by gas-to-particle conversion of gaseous pollutants in the eastern part of China whereas those in the northeastern parts of China are composed of the mixture of the anthropogenic aerosols and the Asian dust aerosol originated from the dust source regions of northern China and Mongolia. These high aerosol concentrations are found to be subsequently transported to the downwind regions of the Korean Peninsula and Japan causing a prolonged haze event there. It is also found that the Asian dust aerosol originated from northern China and Mongolia and the anthropogenic aerosols produced by chemical reactions of pollutants in the high emissions region of eastern China can cause significantly adverse environmental impacts in the whole Asian region by increased atmospheric aerosol loadings that may cause respiration diseases and visibility reduction and by excess deposition of aerosols causing adverse impacts on terrestrial and marine eco-systems.","PeriodicalId":39336,"journal":{"name":"International Journal of Energy, Environment and Economics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74724336","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

A New Consideration About Floating Storage and Regasification Unit for Liquid Natural Gas 液化天然气浮式储存再气化装置的新思考

International Journal of Energy, Environment and Economics Pub Date : 2021-03-24 DOI: 10.46300/91012.2021.15.8

M. Sagau, M. Panaitescu, F. Panaitescu, Scupi Alexandru-Andrei

引用次数: 0

Sustainable Pneumatic Transport Systems of Cereals 谷物可持续气动运输系统

International Journal of Energy, Environment and Economics Pub Date : 2021-03-24 DOI: 10.46300/91012.2021.15.4

M. Panaitescu, Gabriel Dumitrescu, A. Scupi

{"title":"Sustainable Pneumatic Transport Systems of Cereals","authors":"M. Panaitescu, Gabriel Dumitrescu, A. Scupi","doi":"10.46300/91012.2021.15.4","DOIUrl":"https://doi.org/10.46300/91012.2021.15.4","url":null,"abstract":"Technological pneumatic transport installations are designed to move materials from one place to another in various phases of the production process. For example: loadingunloading materials (cereals) using rail and marine transport, air tunnel container transport, supplying combustion installations with burning coal dust. The main parameter in pneumatic transport installations is the velocity of air. For the regime of motion with material particles in suspension, for a given flow material, the higher the velocity is the greater the pressure loss will be and thus the energy consumption for transportation will increase. In horizontal pipes at the beginning of motion flow we have a compact regime, and then due to decrease air velocity a continuous layer regime is forming. This is the apparent motion in wich the pressure losses increase with the decrease of velocity. By reducing the air velocity the thickness of the deposited material increases and the real air passage section decreases and therefore the real air velocity increases, which explains the increase in pressure loss. In vertical pipes if the air velocity decreases below the lower limit of volant transport, after a critical area of instability, a transportation fluidized bed is established, the pressure losses being much larger than the particles in suspension mode. If the velocity further decreases the particles can not be entrained in the air.","PeriodicalId":39336,"journal":{"name":"International Journal of Energy, Environment and Economics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89451604","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

Modeling of Thermophilic Anaerobic Digestion of Municipal Sludge Waste using Anaerobic Digestion Model No. 1 (ADM1) 基于厌氧消化模型1 (ADM1)的城市污泥垃圾嗜热厌氧消化建模

International Journal of Energy, Environment and Economics Pub Date : 2021-03-24 DOI: 10.46300/91012.2021.15.3

T. Lee, Y. H. Lee

引用次数: 1

Monitoring System of Environment Noise and Pattern Recognition 环境噪声监测系统与模式识别

International Journal of Energy, Environment and Economics Pub Date : 2021-03-24 DOI: 10.46300/91012.2021.15.2

L. S. Fernández, L. A. S. Pérez, José Juan Carbajal Hernández

{"title":"Monitoring System of Environment Noise and Pattern Recognition","authors":"L. S. Fernández, L. A. S. Pérez, José Juan Carbajal Hernández","doi":"10.46300/91012.2021.15.2","DOIUrl":"https://doi.org/10.46300/91012.2021.15.2","url":null,"abstract":"This paper presents an overview of the wireless monitoring system of environment noise, placed throughout Historical Centre of México City which represents an attractive technological innovation. It takes permanent measurements of noise levels and stream the data back to the main monitoring station every five minutes and the measurements of noise produced during the take-off in a location of the International Airport. The data acquisition is made at 25 KHz at 24 bits resolution. This work allows analyzing the urban noise level and its frequency range. Additionally, a computational model for aircraft recognition using take-off noise spectral features is analyzed based on other previous results. Eight aircraft categories with all signals acquired in real environments are used. The model has an identification level between 65 and 70% of success. These spectral features are used to allow comparison with other aircraft recognition methods using speech processing techniques in real environments. This system type helps to foresee potential effects to health of environment noise. Keywords—noise, aircraft, pattern, recognition, monitoring.","PeriodicalId":39336,"journal":{"name":"International Journal of Energy, Environment and Economics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87759432","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

Municipal Waste Water Toxicity Evaluation with Vibrio Fisheri 用费氏弧菌评价城市污水毒性

International Journal of Energy, Environment and Economics Pub Date : 2021-03-24 DOI: 10.46300/91012.2021.15.7

H. Raclavská, Jarmila Drozdová, S. Hartmann

引用次数: 0

Clearing Break Points of Overcurrent Protection Coordination for Parallel Distribution Feeder 并联配电馈线过流保护协调断点清除

International Journal of Energy, Environment and Economics Pub Date : 2021-01-18 DOI: 10.46300/91012.2020.14.8

Mahmoud A. Elsadd, A. Taalab, T. Kawady, N. Elkalashy

引用次数: 0

Effect of Recycled Concrete Aggregates on Compressive Strength and Water Permeability of Concrete 再生混凝土骨料对混凝土抗压强度和透水性的影响

International Journal of Energy, Environment and Economics Pub Date : 2020-12-30 DOI: 10.46300/91012.2020.14.6

Asad-ur-Rehman Khan, T. Ayub, Wajeeha Mahmood

{"title":"Effect of Recycled Concrete Aggregates on Compressive Strength and Water Permeability of Concrete","authors":"Asad-ur-Rehman Khan, T. Ayub, Wajeeha Mahmood","doi":"10.46300/91012.2020.14.6","DOIUrl":"https://doi.org/10.46300/91012.2020.14.6","url":null,"abstract":"This paper discusses the effects of recycled concrete aggregates (RCA) on compressive strength and permeability of recycled aggregate concrete (RAC) by using recycled concrete aggregates as a replacement of natural coarse aggregates (NCA). Four replacement percentages were used to study the effect of replacement. Replacement percentages used were 30%, 50%, 70% and 100% with 0% replacement was used as control. Mix design of 1:1.24:2.6 was used in the study with water to cement ratio of 0.43. Influence of RCA on compressive strength was determined for all the mixes as per ASTM C39 standard. The permeability of all the mixes was determined by measuring absorption, sorptivity and Darcy’s coefficient. Results of compressive strength indicated that concrete with 30% replacement of NCA can be successfully used in structural concrete without compromising too much on strength. Whereas, the replacement of natural aggregates with RCA has a negative impact on the permeability of concrete at all replacement levels. Absorption, sorptivity and permeability of natural aggregate concrete is lower as compared to RAC with 30% replacement showing the better performance as compared to other replacement ratios.","PeriodicalId":39336,"journal":{"name":"International Journal of Energy, Environment and Economics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82435348","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