To further discuss the extraction of CQD from EFB biochar a mechanism based on hydrothermal-induced extraction of CQD is proposed The optimal structure of CQD deduced by density functional theory (DFT) in energy and dipole momentum was about 2057 4905 Hatree and 18 1699 Debye respectively Microwave assisted extraction has been found to provide good results It allows to reduce extraction time and the amount of solvent required However during this work microwave radiation has been used as a pretreatment for a conventional process: instead of irradiating the sample up to a mild temperature (difficult industry implementation

Extraction

Aug 05 2016Microwave-assisted Extraction :Microwave-assisted Extraction : 46 Microwaves are electromagnetic radiations with a frequency from 0 3 to 300 GHz (Camel 2001) In order to avoid interferences with radio communications domestic and industrial microwaves generally operate at 2 45 GHz (Fig 1)

article{Matharu2016AcidfreeMH title={Acid-free microwave-assisted hydrothermal extraction of pectin and porous cellulose from mango peel waste – towards a zero waste mango biorefinery} author={Avtar Singh Matharu and Joseph A Houghton and Covadonga Lucas-Torres and Andr{'e}s Moreno} journal={Green Chemistry} year={2016} volume={18

Microwave assisted hydrothermal extraction of carbohydrates from macroalgae and the impact of seasonal variation In order to make the best use of the macroalgal feedstock a three step hydrothermal microwave assisted biorefinery is proposed with utilisation of the waste as a feedstock for fuel production or as a fertiliser being considered

Extraction and separation of nickel and cobalt from saprolite laterite ore were studied by using a method of microwave-assisted hydrothermal leaching and chemical deposition The effects of leaching temperature and time on the extraction efficiencies of Ni 2+ and Co 2+ were investigated in detail under microwave conditions

The power used effect of microwave-assisted to the extraction process was obtained decreasing of 81% and the extraction time could be efficiency from 6 to 2 hours The microwave extraction process can increase a yield of TiO gel hydrothermal solvothermal chemical vapor deposition electrodeposition direct oxidation (anodizing) and the

Microwave assisted hydrothermal extraction of

Feb 01 2018Microwave assisted hydrothermal extraction of polysaccharides was carried out using UWave-2000 Sineo Microwave Chemistry Technology Co LTD Extraction procedure followed our previous method with some modifications (Yuan Macquarrie 2015b) Briefly 5 g seaweed powder was suspended in 100 mL aqueous solution with different HCl

Apr 16 2018Du Y Schuur B Samor C Tagliavini E Brilman DWF (2013) Secondary amines as switchable solvents for lipid extraction from non-broken microalgae Bioresour Technol 149:253–260 CrossRef Google Scholar Elaigwu SE Greenway GM (2016a) Microwave-assisted hydrothermal carbonization of rapeseed husk: a strategy for improving its solid fuel

Microwave-assisted heating under controlled conditions has been shown to be a valuable technology for any application that requires heating of a reaction mixture since it often dramatically reduces reaction times – typically from days or hours to minutes or even seconds even with non-polar solvents If however the mixture is non-polar

Profiling of essential oil chemical composition of some Lamiaceae species extracted using conventional and microwave‐assisted hydrodistillation extraction methods via chemometrics tools Author: Hassanein Heba D El‐Gendy Abd El‐Nasser G Saleh Ibrahim A Hendawy Saber F Elmissiry Moustafa M Omer Elsayed A

As a staple food for much of the world rice production is widespread However it also results in the generation of large quantities of non-food biomass primarily in the form of straw and husks Although they have been little utilized and much rice straw is still simply burned these lignocellulosic materials potentially have considerable values

The power used effect of microwave-assisted to the extraction process was obtained decreasing of 81% and the extraction time could be efficiency from 6 to 2 hours The microwave extraction process can increase a yield of TiO gel hydrothermal solvothermal chemical vapor deposition electrodeposition direct oxidation (anodizing) and the

1 2 This method is provided as a rapid multi-e lement microwave assisted acid digestion prior to analysis protocol so that decisions can be made about the site or material Digests an d hydrofluor ic acid or the use of specialized non-glass components during instrumental analysis

A systematic investigation of the interaction of microwave irradiation with microcrystalline cellulose has been carried out covering a broad temperature range (150 → 270 C) A variety of analytical techniques (e g HPLC 13C NMR FTIR CHN analysis hydrogen–deuterium exchange) allowed for the analysis of the obtained liquid and solid products Based on these results a mechanism

The kinetics of inhibitor production resulting from

Mar 29 2014The kinetic profiles for the total mass loss could be successfully fitted to a first order kinetic equation () overlayed on the data in Figure 1a where S t is the mass removed at time t in units of g/kg-original dry mass S inf is the mass removed at infinite time and k is the rate constant The fitted rate constants for each temperature are summarised in Table 2 from which

In this study we report a facile ligand‐assisted in situ hydrothermal approach for preparation of compact [Al(OH)(1 4‐NDC)] (1 4‐NDC=1 4‐naphthalenedicarboxylate) MOF membranes on porous γ‐Al 2 O 3 substrates which also served as the Al 3+ source of MOF membranes Simultaneously it was observed that the heating mode exerted significant influence on the

materials Article Acid-Free Hydrothermal-Extraction and Molecular Structure of Carbon Quantum Dots Derived from Empty Fruit Bunch Biochar Norhanisah Jamaludin 1 Tong Ling Tan 1 * Alif Syafiq Kamarol Zaman 1 Amir Reza Sadrolhosseini 2 and Suraya Abdul Rashid 1 3 * 1 Materials Processing and Technology Laboratory Institute of Advanced Technology Universiti

materials Article Acid-Free Hydrothermal-Extraction and Molecular Structure of Carbon Quantum Dots Derived from Empty Fruit Bunch Biochar Norhanisah Jamaludin 1 Tong Ling Tan 1 * Alif Syafiq Kamarol Zaman 1 Amir Reza Sadrolhosseini 2 and Suraya Abdul Rashid 1 3 * 1 Materials Processing and Technology Laboratory Institute of Advanced Technology Universiti

Extraction and separation of nickel and cobalt from saprolite laterite ore were studied by using a method of microwave-assisted hydrothermal leaching and chemical deposition The effects of leaching temperature and time on the extraction efficiencies of Ni 2+ and Co 2+ were investigated in detail under microwave conditions

A green process for the microwave-assisted hydrothermal selective dissolution and utilisation of hemicellulose in Phyllostachys heterocycla cv Pubescens (shortened to pubescens) was developed The process facilitated the efficient dissolution of hemicellulose at 200 C while obtaining hemicellulose-free residue that could be further used as starting materials within

Nov 01 2019Microwave-assisted hydrothermal extraction of non-structural carbohydrates and hemicelluloses from tobacco biomass was investigated Non-structural carbohydrates extraction was optimized by an Optimal design The maximum yields for the leaf and stem were 118 57 mg/g and 120 33 mg/g biomass respectively