Indian Chemical Engineer最新文献_第8页

Thermal degradation of calcium lactate pentahydrate using TGA/FTIR/MS: thermal kinetic and thermodynamics studies 热降解五水乳酸钙的热动力学和热力学研究

IF 1.5

Indian Chemical Engineer Pub Date : 2021-12-22 DOI: 10.1080/00194506.2021.2017359

S. Polat

{"title":"Thermal degradation of calcium lactate pentahydrate using TGA/FTIR/MS: thermal kinetic and thermodynamics studies","authors":"S. Polat","doi":"10.1080/00194506.2021.2017359","DOIUrl":"https://doi.org/10.1080/00194506.2021.2017359","url":null,"abstract":"ABSTRACT The objective of this study is to investigate the thermal degradation kinetics and thermodynamics of the calcium lactate pentahydrate (CLP) crystals by means of a thermogravimetric analyzer (TGA) at four different heating rates from 25°C to 1000°C in N2 atmosphere. First, the CLP crystals were precipitated at pH 6 and 25°C in a batch-type crystallizer and the obtained crystals were characterised by X-ray powder diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The XRD result showed that the calcium l-lactate pentahydrate (L-CLP) was the only crystalline phase produced. Then, the activation energy and pre-exponential factor of thermal degradation were determined based on the Coats–Redfern, Flynn–Wall–Ozawa (FWO), Kissinger–Akahira–Sunose (KAS), and Starink models. The degradation reaction order was determined as 1.5 by Coats-Redfern model. The average activation energy of the CLP was 34.7, 33.0, and 33.3 kJ/mol for the FWO, KAS, and Starink models, respectively. Thermodynamic parameters as changes in enthalpy, entropy and Gibbs free energy were calculated depending on the conversion degree. Finally, TGA in combination with FTIR and mass spectrometer (MS) was utilised to detect the evolved gases during the degradation of CLP. H2O and CO2 were identified as the main evolved products. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"402 - 415"},"PeriodicalIF":1.5,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43078216","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: 2

Physical, mechanical, and electrical properties of rice starch-based films plasticised by ionic liquid 离子液体塑化大米淀粉基薄膜的物理、机械和电学特性

IF 1.5

Indian Chemical Engineer Pub Date : 2021-12-16 DOI: 10.1080/00194506.2021.2013737

Joydev Roy, S. Bhattacharya, P. Sahu, A. Das

引用次数: 0

Optimising hydrodynamic conditions for inhibiting scale deposition on metal surfaces in the presence of aspartic acid 优化水动力条件以抑制天冬氨酸存在下金属表面的水垢沉积

IF 1.5

Indian Chemical Engineer Pub Date : 2021-12-14 DOI: 10.1080/00194506.2021.2013736

Shahid Z. Ansari, A. Pandit

引用次数: 3

Efficient separation and quantification of methyl palmitate and methyl oleate in biodiesel mixture using reverse-phase high performance liquid chromatography 反相高效液相色谱法高效分离和定量生物柴油混合物中的棕榈酸甲酯和油酸甲酯

IF 1.5

Indian Chemical Engineer Pub Date : 2021-11-04 DOI: 10.1080/00194506.2021.1997652

Venkatesh Mandari, S. Devarai

{"title":"Efficient separation and quantification of methyl palmitate and methyl oleate in biodiesel mixture using reverse-phase high performance liquid chromatography","authors":"Venkatesh Mandari, S. Devarai","doi":"10.1080/00194506.2021.1997652","DOIUrl":"https://doi.org/10.1080/00194506.2021.1997652","url":null,"abstract":"ABSTRACT\u0000 The excessive utilization of petroleum resources leads to global warming, crude oil price fluctuations, and fast depletion of petroleum reserves. Biodiesel (Fatty Acid Methyl Ester, FAME) has gained importance as a clean and renewable energy source over the last few years. It is produced by reacting vegetable oils and short-chain alcohols via transesterification/esterification reaction. The properties of biodiesel depend on the vegetable oils’ fatty acid composition due to the saturated and unsaturated fatty acid content variation. During the FAME quantification analysis, separation of methyl palmitate (MeP) and methyl oleate (MeO) are major challenges in the C18 column in High Performance Liquid Chromatography (HPLC). These components are difficult to quantify as they elute simultaneously by forming an overlapping peak. A new reverse-phase HPLC separation method with C18 column has been developed to efficiently separate and quantify FAMEs derived from palm oil. UV-VIS detector was used at 205 nm. The FAMEs separation was achieved using ternary mobile phase solvents acetonitrile, water, and acetone with the composition of 62%, 33%, and 5% in an isocratic flow with 2.20 mL/min flowrate and 45 °C column temperature. Methyl esters were analyzed with satisfactory linearity (r 2 >0.99), repeatability (relative standard deviation <2%), and sensitivity (limit of quantification). GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"359 - 367"},"PeriodicalIF":1.5,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47395474","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

Ultrasonic characterisation of the binary mixture of 2,3-dichloroaniline with methanol and ethanol 2,3-二氯苯胺与甲醇和乙醇二元混合物的超声表征

IF 1.5

Indian Chemical Engineer Pub Date : 2021-10-25 DOI: 10.1080/00194506.2021.1988872

Mahendra Kumar, Mohd Aftab Khan, Chandreshvar Prasad Yadav, D. Pandey, Dhananjay Singh

引用次数: 1

Adsorption of acetic acid on ion exchange resin in aqueous and non-aqueous conditions: batch equilibrium study and thermodynamic analysis 离子交换树脂在水和非水条件下对乙酸的吸附：间歇平衡研究和热力学分析

IF 1.5

Indian Chemical Engineer Pub Date : 2021-10-20 DOI: 10.1080/00194506.2021.1988871

Manisha A. Khedkar, Pranhita R. Nimbalkar, S. Bankar, P. Chavan

引用次数: 0

Accelerated mass transfer enhancement by density-driven natural convection 由密度驱动的自然对流加速传质增强

IF 1.5

Indian Chemical Engineer Pub Date : 2021-09-23 DOI: 10.1080/00194506.2021.1978873

C. Has

引用次数: 1

Enhanced extraction of soluble dietary fibre and seed oil from tomato pomace 番茄渣中可溶性膳食纤维和籽油的强化提取

IF 1.5

Indian Chemical Engineer Pub Date : 2021-09-23 DOI: 10.1080/00194506.2021.1978874

Sheetal S. Kothawale, Pradip B. Dhamole

{"title":"Enhanced extraction of soluble dietary fibre and seed oil from tomato pomace","authors":"Sheetal S. Kothawale, Pradip B. Dhamole","doi":"10.1080/00194506.2021.1978874","DOIUrl":"https://doi.org/10.1080/00194506.2021.1978874","url":null,"abstract":"ABSTRACT This paper reports the extraction of soluble dietary fibre (SDF) and seed oil, from tomato peel and seed respectively. SDF was extracted using the alkaline extraction method, while the oil was extracted by a surfactant-assisted aqueous extraction method (SAAE). The alkaline extraction method reported for papaya peels is optimised in the present work for tomato peels. Maximum SDF yield of 17.2 g/ 100 g of defatted peel was achieved with the following extraction conditions: NaOH 1% (w/w); temperature 50°C; solid/liquid (L/S) 50:1 and time 60 min. Extracted SDF showed a low molar mass of 1.27×106 Da which is desirable as it helps in the formation of a gel. For SAAE, surfactants were screened from a range of surfactants (L61, L62, L64, Tween 80, and Triton X-100). Out of these, L62, at 1% (v/v) concentration showed 70% (w/w) extraction yield in a single-stage extraction with a L/S ratio of 25:1. SDF and oil yield obtained from these methods were higher than previously reported extraction techniques. Thus, both the alkaline extraction and SAAE were found to be better methods for SDF and seed oil extraction respectively. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"326 - 335"},"PeriodicalIF":1.5,"publicationDate":"2021-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49210987","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

Optimisation of absorption power cycle for generator temperatures 60–210°C with LiBr water as a working fluid 发电机温度为60–210°C，以溴化锂为工作流体的吸收式功率循环优化

IF 1.5

Indian Chemical Engineer Pub Date : 2021-09-02 DOI: 10.1080/00194506.2021.1963851

Rahul S. Patil, S. Bhagwat

引用次数: 0

Green synthesis and kinetic study of eco-friendly chelating agent by hydrothermal process for remediation of heavy metals 水热法环境友好型重金属螯合剂的绿色合成及动力学研究

IF 1.5

Indian Chemical Engineer Pub Date : 2021-08-23 DOI: 10.1080/00194506.2021.1965039

Abhay Sahu, N. Rane, Badal G. Lodaya, A. Pandit

{"title":"Green synthesis and kinetic study of eco-friendly chelating agent by hydrothermal process for remediation of heavy metals","authors":"Abhay Sahu, N. Rane, Badal G. Lodaya, A. Pandit","doi":"10.1080/00194506.2021.1965039","DOIUrl":"https://doi.org/10.1080/00194506.2021.1965039","url":null,"abstract":"ABSTRACT Water management forms a critical issue in the world because water accessibility increments due to the lack of freshwater assets and contamination effects. Water contamination brought about by toxic elements is one of the most significant natural issues in the world. Heavy metals are poisonous to human and threatening for the surroundings. The goal of this study has been to examine the impacts of newly synthesised eco-friendly chelating agent on the removal of heavy metal ions from synthetic water. Here a new eco-friendly chelating agent based on the glycine and citric acid has been synthesised successfully in the high-pressure reactor without the use of any harmful chemicals, using only water as a solvent. Developed eco-friendly chelating agent, 2,2′-((2-(2-((carboxymethyl)amino)-2-oxoethyl)-2hydroxysuccinyl)bis(azanediyl)diacetic acid has been studied in the framework of green chemistry to address the issues of cleaner synthesis. In the perspective of green chemical synthesis and sustainable development, atom economy (AE), Environmental – Factor (E-Factor) and Process Mass Intensity has been estimated for the studied amide synthesis process. The effect of various parameters like pH of the solution, contact time, ratio of metal to chelate and temperature was examined for the removal of heavy metals like chromium, copper and zinc from synthetic water. GRAPHICAL ABSTRACT","PeriodicalId":13430,"journal":{"name":"Indian Chemical Engineer","volume":"64 1","pages":"227 - 242"},"PeriodicalIF":1.5,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42987298","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