Catalytic pyrolysis of cellulose and chitin with calcined dolomite – Pyrolysis kinetics and products analysis

Fuel ◽  
2022 ◽  
Vol 312 ◽  
pp. 122875
Author(s):  
Pu Wang ◽  
Yafei Shen
Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 702 ◽  
Author(s):  
Justas Eimontas ◽  
Nerijus Striūgas ◽  
Mohammed Ali Abdelnaby ◽  
Samy Yousef

Recently, the pyrolysis process has been adapted as a sustainable strategy to convert metallized food packaging plastics waste (MFPW) into energy products (paraffin wax, biogas, and carbon black particles) and to recover aluminum. Usually, catalysts are used in pyrolysis treatment to refine pyrolysis products and to increase their yield. In order to study the effect of a catalyst on the formulated volatile products, this work aims to study the pyrolysis behavior of MFPW in presence of catalyst, using TG-FTIR-GC–MS system. The pyrolysis experiments were conducted with ZSM-5 Zeolite catalyst with different concentrations (10, 30, and 50 wt.%) at different heating rates (5, 10, 15, 20, 25, and 30 °C/min). In addition, TG-FTIR system and GC-MS unit were used to observe and analyze the thermal and chemical degradation of the obtained volatile compounds at maximum decomposition peaks. In addition, the kinetic results of catalytic pyrolysis of ZSM-5/MFPW samples matched when model-free methods, a distributed activation energy model (DAEM), and an independent parallel reaction kinetic model (IPR) were used. The TGA-DTG results showed that addition of a catalyst did not have a significant effect on the features of the TGA-DTG curves with similar weight loss of 87–90 wt.% (without taking the weight of the catalyst into account). Meanwhile, FTIR results manifested strong presence of methane and high-intensity functional group of carboxylic acid residues, especially at high concentration of ZSM-5 and high heating rates. Likewise, GC-MS measurements showed that Benzene, Toluene, Hexane, p-Xylene, etc. compounds (main flammable liquid compounds in petroleum oil) generated catalysts exceeding 50%. Finally, pyrolysis kinetics showed that the whole activation energies of catalytic pyrolysis process of MFPW were estimated at 289 kJ/mol and 110, 350, and 174 kJ/mol for ZSM-5/MFPW samples (10, 30, and 50 wt.%, respectively), whereas DAEM and IPR approaches succeeded to simulate TGA and DTG profiles with deviations below <1.


2001 ◽  
Vol 23 (7) ◽  
pp. 657-663 ◽  
Author(s):  
Yilser Güldoğan ◽  
Tülay Durusoy ◽  
Tijen Bozdemir

2014 ◽  
Vol 2014 (1) ◽  
pp. 36-44 ◽  
Author(s):  
Mahir Said ◽  
◽  
Geofrey John ◽  
Cuthbert Mhilu ◽  
Samwel Manyele ◽  
...  

Author(s):  
I. Nikishkin ◽  
L. Zakonnova

The most rational way to reduce the eutrophic load on reservoirs-coolers of energy enterprises, in which the technological processes of energy production and growing fish products are not disrupted, is the introduction of fish-reclaimers into the reservoir. In this regard, full-system fisheries of this type include the production of fish-planting material of herbivorous species, in particular grass carp Ctenopharyngodon idella in their work plan. In the production conditions of Belovsky Fisheries LLC, a technology for growing planting material and commercial products of the white Amur has been developed, which has fully justified itself. At the same time, certain difficulties are associated with obtaining high-quality sexual products of herbivorous fish. Due to the technological features and hydrochemical regime of the reservoir, the production of plant-eating fish planting material is carried out with a high risk of over-aging of sexual products. Analysis of the results of spawning campaigns revealed a number of problems, including: zero percent of fertilization, early maturation and release of part of the eggs by females after a permissive injection, and gonad thrombosis. To solve the problem of low fertilization rate, special attention should be paid to sufficient oxygen concentration in water during pre-spawning operations with producers of Cupid. The problem of over-aging of sexual products and gonad thrombosis is proposed to be solved by using a flexible scheme of hormonal stimulation of producers.


2018 ◽  
Vol 50 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Ruijuan Wang ◽  
Fang Liang ◽  
Changle Jiang ◽  
Zehui Jiang ◽  
Jingxin Wang ◽  
...  

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