Pyrolysis kinetics of tannin–phenol–formaldehyde resin by non-isothermal thermogravimetric analysis

2015 ◽  
Vol 121 (2) ◽  
pp. 867-876 ◽  
Author(s):  
Zhao Yi ◽  
Cheng Li ◽  
Jinxue Jiang ◽  
Jizhi Zhang ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Pyrolysis Kinetics ◽  
Kinetics Of

Pyrolysis kinetics of phenol–formaldehyde resin by non-isothermal thermogravimetry

Carbon ◽  
2010 ◽  
Vol 48 (2) ◽  
pp. 352-358 ◽  
Author(s):  
Haiyun Jiang ◽  
Jigang Wang ◽  
Shenqing Wu ◽  
Baosheng Wang ◽  
Zhangzhong Wang
Keyword(s):  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Pyrolysis Kinetics ◽  
Isothermal Thermogravimetry ◽  
Kinetics Of

scholarly journals Pulsating Gas Dosage in the Moulding Sands Hardening Process in the Cold-Box Technology

2013 ◽  
Vol 58 (3) ◽  
pp. 837-840 ◽  
Author(s):  
J. Zych
Keyword(s):  
Water Glass ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Technological Properties ◽  
Ultrasound Method ◽  
Hardening Process ◽  
Gas Consumption ◽  
Kinetics Of ◽  
Cold Box

Abstract The results of investigations of the moulding sands hardening process in the cold-box technology - with an application of two ways of gas dosage - are presented in the paper. A new, ultrasound method of testing the kinetics of hardening of moulding sands with chemical binders was applied. Moulding sands with phenol-formaldehyde resin and moulding sands with water-glass hardened by CO2:, were subjected to investigations. A continuous gas dosage was substituted by the pulsating one. It was shown, that the change of the dosage mode could lead to decreasing the gas consumption (even several times). In addition, it was found that the pulsating way of dosage provides improvements of moulding sands technological properties, mainly strength. Investigations concerned the cold-box processes, in which one or two technological gases were used.

Purification of water contaminated with heavy metals by example of lead as promising material based on graphene nanostructures

2020 ◽  
pp. 34-43
Author(s):  
N. R. Memetov ◽  
◽  
A. V. Gerasimova ◽  
A. E. Kucherova ◽  
◽  
...  
Keyword(s):  
Adsorption Process ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Parameter Estimates ◽  
Maximum Adsorption Capacity ◽  
Ecological Situation ◽  
Characteristic Parameters ◽  
Purification Of Water ◽  
Graphene Nanostructures

The paper evaluates the effectiveness of the use of graphene nanostructures in the purification of lead (II) ions to improve the ecological situation of water bodies. The mechanisms and characteristic parameters of the adsorption process were analyzed using empirical models of isotherms at temperatures of 298, 303, 313 and 323 K, which correspond to the following order (based on the correlation coefficient): Langmuir (0.99) > Temkin (0.97) > Dubinin – Radushkevich (0.90). The maximum adsorption capacity of the material corresponds to the range from 230 to 260 mg/g. We research the equilibrium at the level of thermodynamic parameter estimates, which indicates the spontaneity of the process, the endothermic nature and structure change of graphene modified with phenol-formaldehyde resin during the adsorption of lead (II) ions, leading to an increase in the disorder of the system.

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