A hybrid kinetic and optimization approach for biomass pyrolysis: The hybrid scheme of the isoconversional methods, DAEM, and a parallel-reaction mechanism

2020 ◽  
Vol 208 ◽  
pp. 112531 ◽  
Author(s):  
Hui Liu ◽  
Muhammad Sajjad Ahmad ◽  
Hesham Alhumade ◽  
Ali Elkamel ◽  
Shervin Sammak ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Isoconversional Methods ◽  
Optimization Approach ◽  
Parallel Reaction ◽  
Biomass Pyrolysis ◽  
Hybrid Scheme

scholarly journals A Global Dynamic Harmony Search for Optimization of a Hybrid Photovoltaic–Battery Scheme: Impact of Type of Solar Panels

2021 ◽  
Vol 14 (1) ◽  
pp. 109
Author(s):  
Jingchao Liu ◽  
Lixue Mei ◽  
Akbar Maleki ◽  
Roghayeh Ghasempour ◽  
Fathollah Pourfayaz
Keyword(s):  
Harmony Search ◽  
Cost Effective ◽  
Optimization Method ◽  
Optimization Approach ◽  
Solar Panels ◽  
Hybrid Scheme ◽  
Total Cost ◽  
Optimal Sizing ◽  
Global Dynamic ◽  
Performance Optimizations

The type of solar panels has a great impact on the optimal sizing of a hybrid photovoltaic–battery scheme. The optimization of these schemes based on a powerful optimization approach results in more cost-effective schemes. In this paper, a new global dynamic harmony search method, as an optimization method, is presented for the optimal sizing of a hybrid photovoltaic–battery scheme. The new optimization method is aimed at minimizing the total cost and loss of load supply probability of the scheme at the same time. In this regard, the effect of the type of solar panels on the optimal sizing of the hybrid scheme is investigated. Furthermore, performance optimizations are performed with an original global dynamic harmony search, an original harmony search, and simulated annealing to determine the effectiveness of the suggested optimization method. The effects of the initial costs and efficiency of monocrystalline and polycrystalline solar panels on the optimization of hybrid systems are analyzed. The superiority of the suggested method in terms of time and cost indicators of the hybrid scheme is presented comparing the other algorithm.

scholarly journals Non-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m-Li2ZrO3) during solid-state reaction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Juan P. Yasnó ◽  
Susana Conconi ◽  
Arnaldo Visintin ◽  
Gustavo Suárez
Keyword(s):  
Reaction Mechanism ◽  
Solid State ◽  
Kinetic Analysis ◽  
Solid State Reaction ◽  
Diffusion Mechanism ◽  
Model Fitting ◽  
Isoconversional Methods ◽  
Heating Rates ◽  
Isothermal Reaction ◽  
Lithium Zirconate

AbstractNon-isothermal reaction mechanism and kinetic analysis for the synthesis of monoclinic lithium zirconate (m-Li2ZrO3) were investigated by processing of TG-DTA, along with XRD, DLS, and HRTEM. For this purpose, the solid-state reaction of Li2CO3 with ZrO2 was carried out by TG-DTA at different heating rates (10, 20, and 30 °C/min) from room temperature to 1100 °C. The thermal data was used to calculate the kinetic parameters by two types of isoconversional methods: Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS). The reaction mechanism was determined by the model-fitting method, applying the Coats-Redfern (CR) approximation to the different solid-state reaction models. The results confirmed the formation of pure m-Li2ZrO3, consists of semispherical particles of about 490 nm, using a very short reaction time. The average activation energy obtained by FWO and KAS methods were 274.73 and 272.50 kJ/mol, respectively. It was found that the formation of m-Li2ZrO3 from Li2CO3 with ZrO2 is governed by the three-dimensional diffusion mechanism. Based on these results, a microscopic reaction model of the formation of m-Li2ZrO3 was proposed.

A contribution to the study of the catalytic action of clays on the polymerization of styrene: II. Reaction mechanism

Clay Minerals ◽  
1988 ◽  
Vol 23 (1) ◽  
pp. 35-43 ◽  
Author(s):  
D. Njopwouo ◽  
G. Roques ◽  
R. Wandji
Keyword(s):  
Reaction Mechanism ◽  
Thermal Effect ◽  
Reaction Mechanisms ◽  
Nmr Spectra ◽  
Reaction Medium ◽  
Clay Content ◽  
Thermal Polymerization ◽  
Radical Mechanism ◽  
Parallel Reaction ◽  
C Nmr

AbstractThe study of 13C NMR spectra of polystyrene thermally obtained on clays shows that thermal polymerization of styrene on these minerals proceeds by two parallel reaction mechanisms: the radical mechanism due to the thermal effect, and the cationic mechanism in which the initiatory cation H+ is provided by the clay. The latter mechanism, accelerated by increase in temperature, becomes more important as the clay content increases in the reaction medium. Otherwise, the thermal polymerization on clays is accompanied by the hydrogenation of some α carbons of the polystyrene molecule and the oxidation of certain aromatic carbons.

How to determine consistent biomass pyrolysis kinetics in a parallel reaction scheme

Fuel ◽  
2014 ◽  
Vol 123 ◽  
pp. 230-240 ◽  
Author(s):  
Andrés Anca-Couce ◽  
Anka Berger ◽  
Nico Zobel
Keyword(s):  
Reaction Scheme ◽  
Parallel Reaction ◽  
Biomass Pyrolysis ◽  
Pyrolysis Kinetics

Arylation of enelactams using TIPSOTf: reaction scope and mechanistic insight

2021 ◽  
Author(s):  
Tomasz J. Idzik ◽  
Zofia M. Myk ◽  
Łukasz Struk ◽  
Magdalena Perużyńska ◽  
Gabriela Maciejewska ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Multinuclear Nmr ◽  
Mechanistic Insight ◽  
Nmr Study ◽  
Wide Range

Triisopropylsilyltrifluoromethanesulfonate can be effectively used for the arylation of a wide range of enelactams. The multinuclear NMR study provided deep insights into the reaction mechanism.

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