Resource-Efficient Technologies最新文献_第7页

Review on enzymatic synthesis of value added products of glycerol, a by-product derived from biodiesel production 酶法合成生物柴油副产品甘油高附加值产品研究进展

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-04-26 DOI: 10.1016/j.reffit.2017.02.009

J. Pradima, M. Rajeswari Kulkarni, Archna

{"title":"Review on enzymatic synthesis of value added products of glycerol, a by-product derived from biodiesel production","authors":"J. Pradima, M. Rajeswari Kulkarni, Archna","doi":"10.1016/j.reffit.2017.02.009","DOIUrl":"10.1016/j.reffit.2017.02.009","url":null,"abstract":"<div><p>Crude glycerol is produced as a by-product from biodiesel production via trans-esterification with methanol and this process accounts for 10% (w/w) of the total biodiesel produced worldwide. The glycerol glut created can be utilized to increase biodiesel profitability since disposal can pose a threat to the environment. The need is to transform this surplus crude glycerol into added-value products. Biological based conversions are efficient in providing products that are drop-in replacements for petro-chemicals and offer functionality advantage, commanding higher price with the potential to increase bio-refinery revenue. Glycerol is a stable and multifunctional compound used as a building block in fine chemical synthesis like bio-polymers, polyunsaturated fatty acids, ethanol, hydrogen, <em>n</em>-butanol, glycerol carbonate, glycerol acetyl esters etc. Bio-catalysts add higher value to bio based products by catalyzing not only their selective modification, but also their synthesis under controlled and mild conditions. This article focuses on different bioconversion technologies of crude-glycerol to value added industrial products – obtained as waste from current bio-diesel production. We abridge the recent relevant approach for the production of various platform chemicals from bio-glycerol over enzyme and chemical catalysts.</p></div>","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"3 4","pages":"Pages 394-405"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.reffit.2017.02.009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75900182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 61

Performance investigation of vapour recompressed batch distillation for separating ternary wide boiling constituents 蒸汽再压缩间歇精馏分离三元宽沸组分的性能研究

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-05-11 DOI: 10.1016/j.reffit.2017.04.007

Rohith R Nair, Uday Bhaskar Babu G, Amol Raykar

引用次数: 6

A review on biogenic synthesis of gold nanoparticles, characterization, and its applications 纳米金的生物合成、表征及其应用研究进展

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-08-14 DOI: 10.1016/j.reffit.2017.08.002

Soumya Menon, Rajeshkumar S., Venkat Kumar S.

引用次数: 227

Virtual lab based real-time data acquisition, measurement and monitoring platform for solar photovoltaic module 基于虚拟实验室的太阳能光伏组件实时数据采集、测量与监测平台

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-05-05 DOI: 10.1016/j.reffit.2017.04.006

Amit Kumar Rohit, Amit Tomar, Anurag Kumar, Saroj Rangnekar

引用次数: 22

Mathematical modeling of drying behavior of cashew in a solar biomass hybrid dryer 腰果在太阳能生物质混合干燥器中干燥行为的数学建模

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-01-13 DOI: 10.1016/j.reffit.2016.12.002

S. Dhanushkodi , Vincent H. Wilson , K. Sudhakar

引用次数: 64

Optimization studies on extraction of phytocomponents from betel leaves 槟榔叶中植物成分提取工艺的优化研究

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-04-19 DOI: 10.1016/j.reffit.2017.02.007

Muruganandam L, Anantha Krishna, Jashwanth Reddy, G.S. Nirmala

{"title":"Optimization studies on extraction of phytocomponents from betel leaves","authors":"Muruganandam L, Anantha Krishna, Jashwanth Reddy, G.S. Nirmala","doi":"10.1016/j.reffit.2017.02.007","DOIUrl":"10.1016/j.reffit.2017.02.007","url":null,"abstract":"<div><p>The present study aims at finding out the optimum parameters for the extraction of components from Betel leaves possessing medicinal applications using ethanol solvent by Soxhlet apparatus. The optimum conditions for the extract were calculated based on the extract yield by varying four parameters: material quantity (A: 2–4 g), solvent quantity (B: 250–300 ml), mantle temperature (C: 65–75 °C) and extraction time (D: 1–3 hours) and optimized using a four factor three level Box–Behnken response surface design (BBD) coupled with desirability function methodology. Results showed that temperature and extraction time had significant effect on yield of extract. Optimum conditions for highest yield of extract (10.94%) are as follows: material quantity (2 g), solvent quantity (281.4 ml), temperature (72 °C) and time (3 hours). The extract at the maximum yield condition was analyzed for phytocomponents by FTIR and GC–MS. The results indicated the presence of Hydroxy chavicol (69.46%), 4-Chromanol (24%) and Eugenol (4.86%), which possess wide application including as antioxidant, anti-inflammatory, anti-platelet and antithrombotic, antibacterial and antifungal agents.</p></div>","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"3 4","pages":"Pages 385-393"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.reffit.2017.02.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72674695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 45

An experimental analysis of quenching of continuously heated vertical rod with aqueous Al2O3 nanofluid Al2O3纳米流体连续加热竖杆淬火的实验分析

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-04-18 DOI: 10.1016/j.reffit.2017.02.006

Nirupama Patra , Vivek Gupta , Ravi Singh , R.S. Singh , Pradyumna Ghosh , Arun Nayak

{"title":"An experimental analysis of quenching of continuously heated vertical rod with aqueous Al2O3 nanofluid","authors":"Nirupama Patra , Vivek Gupta , Ravi Singh , R.S. Singh , Pradyumna Ghosh , Arun Nayak","doi":"10.1016/j.reffit.2017.02.006","DOIUrl":"10.1016/j.reffit.2017.02.006","url":null,"abstract":"<div><p>Quenching characteristics of metallic vertical rod with an internal heater has been investigated in pure water and water-based nanofluid with alumina nanoparticles of 0.001% by volume. Initial temperature of the testing rod (12 mm diameter and 1000 mm length) ranges from 200 °C to 250 °C. The internal heater may be used to simulate the decay heat generated by the nuclear fuel rod after the power plant shutdown. Tests have been performed with varied range of experimental conditions of decay heat, constant water and nanofluid flow rates. The cooling curves follow a general trend of a rapid temperature drop up to almost 100 °C of the rod surface temperature irrespective of the operating parameters and the location of the thermocouple. The obtained results during quenching process indicated that HTC (heat transfer coefficient) for nanofluids are more than de-ionized water. It was also observed that in identical circumstances, the quenching time of the specimen in Al<sub>2</sub>O<sub>3</sub> nanofluid considerably decreased as compared to water. The results exhibit that nanofluids can enhance the reflood heat transfer performance in terms of quenching rate for a long vertical rod causing liquid-droplets-induced depositions of nanoparticles resulting in making a pre-coating effect characterized by higher wettability.</p></div>","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"3 4","pages":"Pages 378-384"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.reffit.2017.02.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88282172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

A new fuzzy framework for the optimal placement of phasor measurement units under normal and abnormal conditions 提出了一种新的模糊框架，用于正常和异常情况下相量测量单元的优化配置

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-09-15 DOI: 10.1016/j.reffit.2017.08.005

Ragab A. El-Sehiemy , Shady H.E. Abdel Aleem , Almoataz Y. Abdelaziz , Murat E. Balci

{"title":"A new fuzzy framework for the optimal placement of phasor measurement units under normal and abnormal conditions","authors":"Ragab A. El-Sehiemy , Shady H.E. Abdel Aleem , Almoataz Y. Abdelaziz , Murat E. Balci","doi":"10.1016/j.reffit.2017.08.005","DOIUrl":"10.1016/j.reffit.2017.08.005","url":null,"abstract":"<div><p>This paper presents a new procedure for finding the optimal placement of the phasor measurement units (PMUs) in modern power grids to achieve full network observability under normal operating conditions, and also abnormal operating conditions such as a single line or PMU outage, while considering the availability of PMU measuring channels. The proposed modeling framework is implemented using the fuzzy binary linear programming (FBLP) technique. Linear fuzzy models are proposed for the objective function and constraints alike. The proposed procedure is applied to five benchmark systems such as the IEEE 14-bus, 30-bus, 39-bus, 57-bus, and 118-bus. The numerical results demonstrate that the proposed framework is capable of finding a fine-tuned optimal solution with a simple model and acceptable solution characteristics compared with early works in the literature. Besides, four evaluation indices are introduced to assure the various criteria under study such as the observability depth, measurement redundancy, and robustness of the method under contingencies. The results show that full network observability can be met under normal conditions using 20% PMUs penetration; however, under contingencies, approximately 50% PMUs penetration is required. The novelty of the proposed procedure has proven the capability of the proposed linear fuzzy models to find better optimal number of PMUs with lower number of channels compared to other algorithms under various operating conditions. Hence, the proposed work represents a potential tool to monitor power systems, and it will help the operators in a smart grid environment.</p></div>","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"3 4","pages":"Pages 542-549"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.reffit.2017.08.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74145828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Biosynthesis of ZnO/SiO2 nanocatalyst with palash leaves’ powder for treatment of petroleum refinery effluent 用芭蕉叶粉生物合成氧化锌/二氧化硅纳米催化剂处理炼油废水

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-08-30 DOI: 10.1016/j.reffit.2017.08.004

Rajani Bharati, S. Suresh

{"title":"Biosynthesis of ZnO/SiO2 nanocatalyst with palash leaves’ powder for treatment of petroleum refinery effluent","authors":"Rajani Bharati, S. Suresh","doi":"10.1016/j.reffit.2017.08.004","DOIUrl":"10.1016/j.reffit.2017.08.004","url":null,"abstract":"<div><p>This work aims the synthesis and characterization of ZnO/SiO<sub>2</sub> nanocatalyst from plant waste material by green route and application of this ZnO/SiO<sub>2</sub> nanocatalyst for the treatment of petroleum refinery effluent. Butea monosperma (Palash) leaves’ powder was used as reducing and stabilizing agent for synthesis of ZnO/SiO<sub>2</sub> nanocatalyst. Palash leaves contain broad variability of biomolecules which work as reducing and capping agent. In this research work, COD and acenaphthylene which is Polycyclic Aromatic Hydrocarbons (PAH) were degraded by synthesizing ZnO/SiO<sub>2</sub> nanocatalyst under UV-light in an annular photocatalytic reactor. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), FIELD emission gun-Scanning electron microscopy (FEG-SEM), Energy dispersive X-ray (EDX) and Transmission electron microscopy (TEM) analysis confirmed the formation of ZnO/SiO<sub>2</sub> nanocatalyst. Characterization studies revealed that spherical and hexagonal nanoparticles with particle size ranging from 8 ± 5 nm to 40 ± 5 nm and mean particle with diameter of 20 ± 5 nm were synthesized using this method which is stable in the environment. Brunauer, Emmett and Teller (BET) surface area of ZnO/SiO<sub>2</sub> nanocatalyst is found to be 150.25 m<sup>2</sup>/g. Fractional Factorial design was applied to find optimum condition of process parameters and found that optimum percent. Removal of COD (mg/l), and acenaphthylene were achieved at reaction condition of 1 g/L of ZnO/SiO<sub>2</sub> nanocatalyst loading, 30<span></span>°C temperature and 4 h reaction time and found that optimum percent removal of COD (mg/l), and acenaphthylene is 75%, and 73% respectively. Various metals, naturally present in palash leaves’ powder, decrease band gap of energy and improve photocatalytic activity of nanocatalyst.</p></div>","PeriodicalId":21019,"journal":{"name":"Resource-Efficient Technologies","volume":"3 4","pages":"Pages 528-541"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.reffit.2017.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81517602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Wind characteristics observation using Doppler-SODAR for wind energy applications 利用多普勒- sodar进行风能特征观测

Resource-Efficient Technologies Pub Date : 2017-12-01 Epub Date: 2017-10-26 DOI: 10.1016/j.reffit.2017.07.001

Prem Kumar Chaurasiya, Siraj Ahmed, Vilas Warudkar

引用次数: 19