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Characterization of Nanocomposite Membrane Based Bacterial Cellulose Made of Pineapple Waste Reinforced by Graphite Nanoplatelets

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Journal of Renewable Materials 2022年第9期10卷 2465-2475页

作者： Heru Suryanto Bili Darnanto Susilo Jibril Maulana Aminnudin Uun Yanuhar Surjani Wonorahardjo Husni Wahyu Wijaya Abu Saad Ansari Center of Excellence for Cellulose Composite(CECCom) Department of Mechanical EngineeringUniversitas Negeri MalangMalang65145Indonesia Centre of Advanced Material for Renewable Energy(CAMRY) Universitas Negeri MalangMalang65145Indonesia Master Program of Mechanical Engineering Faculty of EngineeringUniversitas Negeri MalangMalang65145Indonesia Department of Aquatic Resources Management Faculty of Fisheries and Marine SciencesBrawijaya UniversityMalang65145Indonesia Department of Chemistry Faculty of Mathematics and Natural SciencesUniversitas Negeri MalangMalang65145Indonesia Department of Materials Science&Engineering Incheon National UniversityIncheon464-742South Korea

Waste is the main problem for the *** waste for various useful applications has a benefit for the *** work has been studied for handling pineapple peel waste to make composite film bacterial cellulose nanocomposite membrane(BCNM)with addition graphite nanoplatelet(GNP).The concentration of GNP in the membrane influence the membrane *** bacterial cellulose(BC)pellicle was synthesized by using media from pineapple peel waste *** pellicle is cleaned with water and NaOH solution to be free from *** is synthesized through the mechanical disintegration *** results of disintegration using high pressure homogenizer at 150 bar and five ***/GNP is synthesized with varying addition of GNP of 2.5,5.0,10 and 100 wt%of dry bacterial nanocellulose(BNC).The BC and GNP solution were dried in an oven for 14 h at 80℃.BCNM morphology was observed using *** is dispersed and distributed in the BC matrix as *** analysis shows many peaks of BNC less pronounced with increasing of *** higher concentration of GNP,the rougher of *** optimum tensile strength of BCNM was achieved after addition GNP of 2.5 wt%.

关键词： Bacterial nanocellulose graphite nanoplatelet membrane nanocomposite pineapple waste

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Amorphous silicon solar cells using metallic fishnet nanostructures simultaneously for Schottky contact and plasmonics enhancement

Amorphous silicon solar cells using metallic fishnet nanostr...

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39th IEEE Photovoltaic Specialists Conference, PVSC 2013

作者： Huang, Liang Deng, Huixu Pham, Thach Young, Matthew Naseem, Hameed Abu-Safe, Husam Hamza Yang, Xiaodong Yu, Shui-Qing Arkansas GREEN Research Center for Solar Cells Department of Electrical Engineering University of Arkansas Fayetteville AK 72701 United States Program of Microelectronics and Photonics University of Arkansas Fayetteville AK 72701 United States Department of Mechanical and Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 United States German-Jordanian University School of Natural Resources Engineering and Management Madaba Jordan

ISBN: (纸本)9781479932993

In this paper, an a-Si solar cell using metallic fishnet nanostructures simultaneously as Schottky contact and light trapping structures is presented. The photogenerated carrier could be collected more efficiently when the metal line spacing is engineered to be less than minority carrier diffusion length. Since no heavily doped regions are used in the device, the Shockley-Read-Hall recombination saturation current density could be two orders of magnitude lower than that of p-i-n a-Si solar cell, which will substantially reduce the device loss. The fishnet structure design is optimized through numerical simulation. Improved light absorption inside intrinsic a-Si layer is observed, especially at the wavelength of 632 nm. The detailed device fabrication results are presented. © 2013 IEEE.

关键词： Amorphous silicon

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Broadband Absorptance High Efficiency Silicon Nanowire Fractal Arrays for Photovoltaic Applications

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MRS Online Proceedings Library (OPL) 2014年第1期1707卷 mrss14-1707-uu06-02-mrss14-1707-uu06-02页

作者： Omar H. Alzoubi Husam Abu-Safe Khalid Alshurman Hameed A. Naseem Department of Electrical Engineering University of Arkansas Fayetteville AR 72701 U.S.A. Natural Resources Engineering and Management German-Jordanian University Madaba Jordan Microelectronics and photonics program University of Arkansas Fayetteville AR 72701 U.S.A.

Nanowire arrays have been proposed to enhance light trapping, increase efficiencies, and reduced material cost in photovoltaic solar cells. In this work we present a new crystalline silicon nanowire array structure, inspired by fractal geometry. The array structure is assumed to be an infinite 2D array in the x and y directions, and composed of vertically aligned SiNW suspended in air. Hexagonal fractal-like geometry is adapted in arranging cylindrical SiNW in these arrays. Full-wave finite element method 3D simulation is used to compute reflectance, transmittance and absorptance of the array for a normal incidence plane wave. The proposed fractal-like distribution of SiNW arrays yield broad absorption spectrum and enhanced efficiency while using less material. The efficiency of the proposed fractal-like SiNW arrays achieve ∼100% enhancement over that of the equivalent thickness flat c-Si film, and ∼18% enhancement over an equivalent height hexagonal array. The proposed optimized structures achieved a filling ratio ∼25%, which is ∼33% less than the corresponding hexagonal array.

关键词： photovoltaic optical nanostructure

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Conversion of biochar into sulfonate-bearing solid acids used for the hydrolysis of tylosin:the effect of aromaticity and degree of condensation

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Biochar 2023年第1期5卷 1514-1526页

作者： Qianqian Xie Xiao Yang Binoy Sarkar Xiaomin Dou Piumi Amasha Withana Yong Sik Ok College of Environmental Science and Engineering Beijing Forestry UniversityBeijing 100083People’s Republic of China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101People’s Republic of China Future Industries Institute University of South AustraliaMawson LakesSA 5095Australia Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841Republic of Korea International ESG Association(IESGA) Seoul 06621Republic of Korea

In the last few decades,sulfonated carbon materials have garnered significant attention as Brøsted solid acid *** sulfonation process and catalytic activity of sulfonated biochar can be influenced by the aromaticity and degree of condensation exhibited by ***,the relationships between the aromaticity,sulfonating ability,and resultant catalytic activity are not fully *** this study,biochar samples pyrolyzed at 300-650℃ exhibiting different aromaticity and degrees of condensation were sulfonated and employed as sulfonate-bearing solid catalysts for hydrolytically removing *** exhibited excellent hydrolytic performance and their kinetic constants were positively correlated with the total acidity and negatively correlated with their *** study has uncovered the relationship between the structure,properties,sulfonating ability,and subsequent hydrolytic performance of biochar *** was observed that the aromaticity of biochar decreased as the pyrolysis temperature *** pyrolysis temperatures resulted in a reduced degree of condensation,smaller ring size,and an increased number of ring edge sites available for sulfonation,ultimately leading to enhanced catalytic *** findings provide valuable insights into the fundamental chemistry behind sulfonation upgrading of biochar,with the aim of developing functional catalysts for mitigating antibiotics in contaminated water.

关键词： Biochar upgrading Sulfonation Hydrolytic mitigation Tylosin removal Biochar-based solid acids

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Assessment of the Impact of COVID-19 Lockdown on the Spatio-Temporal Distribution of PM2.5 in Thailand 1

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8th Asia Conference on Environment and Sustainable Development, ACESD 2023

作者： Simatupang, Cathleen Ariella Piyaviriyakul, Pitchaya Pongkiatkul, Prapat Strezov, Vladimir Boontanon, Narin Jindal, Ranjna Boontanon, Suwanna Kitpati Graduate Program in Environmental and Water Resources Engineering Department of Civil and Environmental Engineering Faculty of Engineering Mahidol University Nakhon Pathom73170 Thailand School of Natural Sciences Faculty of Science and Engineering Macquarie University SydneyNSW2109 Australia Department of Environmental Engineering King Mongkut’s University of Technology Thonburi 10800 Bangkok Thailand Faculty of Environment and Resource Studies Mahidol University Nakhon Pathom73170 Thailand Environmental Engineering and Management Program Department of Energy Environment and Climate Change School of Environment and Resources Development Asian Institute of Technology 12120 Pathumthani Thailand Graduate School of Global Environmental Studies Kyoto University 606-8501 Yoshida Sakyo-Ku Kyoto Japan

ISBN: (数字)9789819733200

ISBN: (纸本)9789819733194

During COVID-19 pandemic several countries have implemented quarantines in response to the virus’ spread, which was considered an emergency. Thailand was under a state of emergency from January to December 2020, which has had an impact on the state of environment. Based on real-time data from the Pollution Control Department, the impact of COVID-19 lockdown on PM2.5 pollution in Thailand was examined. Inverse Distance Weighted interpolation was used to generate a more accurate visual representation of the PM2.5 pollution through a spatial distribution of atmospheric pollutants across the provinces of Thailand. PM2.5 levels in all considered areas reduced considerably between 2017 and 2020, with the most significant decrease occurring during the lockdown period of April-July in 2020. As the pre-COVID-19 period occurred during late winter in Thailand, the monthly average PM2.5 concentrations in all selected provinces were gradually increased from December 2019 to March 2020. During the lockdown period, the concentration of PM2.5 was reduced in Pathum Thani (48.9%), Samut Sakhon (35.6%) Samut Prakarn (33.6%), and Bangkok (31.7%) The spatial–temporal distribution of the PM2.5 levels in Samut Sakhon and Samut Prakarn provinces were analyzed for October 2020, during the new normal period. The results showed a significant decrease in concentration of up to 31% compared to previous years where industrial operations were situated. This study showed that the government enforced lockdown during COVID-19 pandemic was beneficial in understanding the impact of reduced human activities on anthropogenic air pollutants’ concentrations. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： COVID-19

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Fresh fruit bunch production of oil palm plantation in the lowland area of Sembilang Dangku Landscape 1

Fresh fruit bunch production of oil palm plantation in the l...

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1st International Conference on natural resources and Environmental Conservation: Impact of Oil Palm Plantation on Physical and Chemical Environment, Biodiversity and Local Social Economic, ICNREC 2018

作者： Segara, Rio Octarizza Hariyadi, H. Sukarman, S. Santoso, Kresno Dwi Study Program of Natural Resource and Environmental Management Science Postgraduate School Bogor Agricultural University Baranangsiang IPB Campus Bogor16143 Indonesia Department of Agronomy and Horticulture Faculty of Agriculture Bogor Agricultural University Dramaga IPB Campus Bogor16680 Indonesia Indonesian Agency for Agriculture Research and Development of Land Resources Ministry of Agriculture Republic Indonesia Cimanggu Bogor16680 Indonesia Indonesia Programme Palembang16128 Indonesia

The results of the study showed that Sembilang Dangku Landscape had known two types of soil namely peat soil and mineral soil. Detail information for peat soil in this area namely Typic Haplosaprists and Typic Haplohemists meanwhile, for mineral soil, there are two types of soil that have been identified at these locations namely Inceptisols (Typic Endoaquepts and Typic Humaquepts) and Entisols (Typic Sulfaquents). This study aimed to analyze the production of oil palm plantations in lowland areas on marginal land. This research was conducted at six locations of oil palm plantations in Musi Banyuasin Regency, South Sumatra province. The methods used were descriptive quantitative and qualitative calculation of FFB (fresh fruit bunches) production that compared the standard potential production of the Palm Oil Research Center (PPKS referred in Indonesia). The yield of FFB oil palm productivity (ton/ha) on marginal land showed that Typic Haplosaprists, Typic Haplohemists and Typic Endoaquepts, Typic Humaquepts did not have a significant effect because yield from plantation management produced FFB production oil palm was quite good. The effect that has quite a different production is Entisols (Typic Sulfaquents) or L6 locations. Based on this research, the type of soil is a factor that greatly affects the productivity of oil palm. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Location

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Optimal Strategy to Reduce Energy Waste in an Electricity Distribution Network Through Direct/Indirect Bulk Load Control

SSRN

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SSRN 2023年

作者： Cerna, Fernando Vladimir Dantas, Jamile T. Naderi, Ehsan Contreras, Javier Department of Electrical Engineering Federal University of Roraima Boa Vista69310-000 Brazil Postgraduate Program in Natural Resources Research Area in Management and Dynamics of Natural Resources – Renewable Energies Federal University of Roraima Av. Nova Iorque – Aeroporto Boa Vista69310-000 Brazil School of Electrical Computer and Biomedical Engineering Southern Illinois University CarbondaleIL62901 United States School of Industrial Engineering University of Castilla-La Mancha Ciudad Real13071 Spain

In recent decades, the ever-increasing demand for electricity in large cities is leading the electricity distribution network (EDN) to an operational state of fatigue, especially at peak load times. Thus, the lifetime of feeders, transformers, circuit breakers, among others, can be compromised. In this context, load congestion, technical losses, and voltage deviations across the EDN can contribute to the high waste of electricity as well as to the worsening of the supply service. To face this problem, this paper proposes a mixed integer linear programming (MILP) model that aims to reshape the demand profile (i.e., load reduction in peak periods without load rebound in the remaining periods of the day) of total consumers while the voltage deviations and technical losses are minimized. In the proposed model, the demand profile reshaping is carried out through direct (DC) and indirect (IC) bulk control of residential, commercial, and industrial loads, while the load factor (LF), i.e., indicator related to the efficient use of electricity, is improved. Due to the scheduling of these loads at certain times of the day, the occurrence of voltage deviations and technical losses can be mitigated by the efficient control of capacitor banks (CBs). © 2023, The Authors. All rights reserved.

关键词： Electric circuit breakers

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Inherently safer reactor design for complex reactions based on calorimetry studies

Inherently safer reactor design for complex reactions based ...

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2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, 11AIChE

作者： Pineda-Solano, Alba L. Saenz-Noval, Lina Carreto-Vazquez, Victor H. Rogers, William J. Mannan, Sam Gao, Jun Papadaki, Maria Waldram, Simon Nayak, Subramanya Mary Kay O'Connor Process Safety Center Artie McFerrin Department of Chemical Engineering Texas A and M University College Station TX 77843-3122 United States IPSE SPEME University of Leeds LS2 9JT United Kingdom Department of Environmental and Natural Resources Management University of Ioannina Seferi 2 Agrinio GR 30100 Greece Chemical Engineering Program Texas A and M University at Qatar PO Box 23874 Doha Qatar

ISBN: (纸本)9780816910670

The N-oxidation of alkylpyridines by hydrogen peroxide is a reaction widely used in the pharmaceutical industry. This reaction is accompanied by the undesired gas-generating decomposition reaction of hydrogen peroxide. The oxygen generation, combined with the flammability of the alkylpyridines, represents a serious hazard of fire and explosion. In this work, a new operation strategy and reactor type for the N-oxidation of alkylpyridines are proposed based on calorimetrically obtained data. Previous studies on this system [8] showed that Langmuir-Hinshelwood type kinetics fits well with the Noxidation of this family of reactions and that increased temperature and catalyst concentration favor the N-oxidation reaction. New calorimetric measurements have been performed over an extended range of temperatures and catalyst concentrations in a closed reactor. These measurements confirm that the N-oxidation of alkylpyridines can actually be performed in a much more efficient and inherently safer manner if a closed reactor is used. The advantages and characteristics of such a reactor are explained and a preliminary design is proposed.

关键词： Calorimetry

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Load Factor Improvement of the Electricity Grid Considering Distributed resources Operation and Regulation of Peak Load

SSRN

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SSRN 2022年

作者： Cerna, Fernando Vladimir Naderi, Ehsan Marzband, Mousa Contreras, Javier Coêlho, John K. Fantesia, Maurício P. Department of Electrical Engineering Federal University of Roraima Boa Vista69310-000 Brazil Postgraduate Program in Natural Resources Research Area in Management and Dynamics of Natural Resources – Renewable Energies Federal University of Roraima Av. Nova Iorque – Aeroporto Boa Vista69310-000 Brazil School of Electrical Computer and Biomedical Engineering Southern Illinois University CarbondaleIL62901 United States Department of Mathematics Physics and Electrical Engineering Faculty of Engineering and Environment Northumbria University Newcastle upon TyneNE1 8ST United Kingdom School of Industrial Engineering University of Castilla-La Mancha Ciudad Real13071 Spain

The load factor (LF) of an electricity network (EN) is an indicator related to the efficient electricity usage within a time horizon (e.g., day, month, year, etc.). LF improvement can be achieved through an efficient operational scheme that combines several strategies. Among them, peak load regulation in the demand profile of all the consumers together with the operation of distributed resources (DREs), such as renewable sources (RSs) and capacitor banks (CBs) represents a promising alternative. To address this efficient scheme, this work proposes a mixed-integer linear programming (MILP) model that aims to increase the LF through the bulk scheduling of residential, commercial, and industrial electrical appliances during the day, considering a baseline demand and an hourly rate. At the same time, voltage fluctuations and technical losses are mitigated by the presence of DREs in the EN. Operational constraints related to the performance of EN, RSs, and CBs are considered. Uncertainties in the habitual demand profiles and solar radiation incidence during the day are represent through simulation algorithms. In order to evaluate our proposal, a modified 14-node IEEE EN was used. The results corroborate the applicability of this proposed MILP model, reducing electricity waste and ensuring the efficient EN operation. © 2022, The Authors. All rights reserved.

关键词： Integer programming

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Load Factor Improvement of the Electricity Grid Considering Distributed resources Operation and Regulation of Peak Load

SSRN

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SSRN 2022年

关键词： Integer programming

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