Study on Clean Treatment of Urea-Formaldehyde Waste Using Fast Pyrolysis

A large amount of urea-formaldehyde (UF) resin waste is generated accompanied with discarded wood-based panels in China. In order to find out a safe and clean technology to recover these wastes, characterization of the nitrogen species released from fast pyrolysis of UF resin was investigated using PY-GC/MS.The results show that nitrogen atom trends to form nitrogen heterocyclic species rather than aliphatic species, especially at high temperature during UF fast pyrolysis. The number of produced species reaches its maximum when temperature was setto the range of 500-600 °C, the proper temperature range for wood fast pyrolysis. During UF resin fast pyrolysis, neither NO, NO2, N2O nor their precursors (HCN and HNCO) were observed. These substances were proven to be very harmful to the environment. Most produced nitrogen species havestrong antibacterial activity, andcan greatly enhance the high-valued utilization of bio-oil. Based on these, we concluded that fast pyrolysis is a promising technology to recover the UF resin waste in a safe and clean manner.

Download Full-text

Fuel Characterization of Bio-oil from Fast Pyrolysis of Tectona grandis in a Fixed Bed Reactor

International Journal of Energy for a Clean Environment ◽

10.1615/interjenercleanenv.2020035930 ◽

2020 ◽

Author(s):

Pious Okekunle ◽

Akinola Ogunsola ◽

Oluwapelumi Babayemi ◽

Emmanuel Abodunrin ◽

Olanrewaju Daramola

Keyword(s):

Fast Pyrolysis ◽

Fixed Bed ◽

Tectona Grandis ◽

Fixed Bed Reactor ◽

Bio Oil ◽

Fuel Characterization

Download Full-text

Characterization of particleboard made from oil heat-treated rubberwood particles at different mixing ratios

BioResources ◽

10.15376/biores.15.3.6795-6810 ◽

2020 ◽

Vol 15 (3) ◽

pp. 6795-6810

Author(s):

Nurul Fatiha Osman ◽

Paimon Bawon ◽

Seng Hua Lee ◽

Pakhriazad Hassan Zaki ◽

Syeed SaifulAzry Osman Al-Eldrus ◽

...

Keyword(s):

Mechanical Properties ◽

Oil Content ◽

Urea Formaldehyde ◽

Physical And Mechanical Properties ◽

Thermal Characterization ◽

High Dimensional ◽

Mixing Ratios ◽

Uf Resin ◽

Heat Treated

Particleboard was produced by mixing oil heat-treated rubberwood particles at different ratios, with the goal of achieving high dimensional stability. Rubberwood particles were soaked in palm oil for 2 h and heat treated at 200 °C for 2 h. The treated particles were soaked in boiling water for 30 min to remove oil and were tested for chemical alteration and thermal characterization via Fourier-transform infrared spectroscopy and thermogravimetric analysis. Particleboard was fabricated by mixing treated rubberwood particles (30%, 50%, and 70%) with untreated particles (70%, 50%, and 30%, respective to previous percentages) and bonded with urea-formaldehyde (UF) resin. The results revealed that oil-heat treated particles had greater thermal stability than the untreated particles. The addition of oil heat treated particles improved the physical properties of the particleboard with no significant reduction in mechanical strength. However, this was only valid for ratios of 70% untreated to 30% treated and 50% untreated to 50% treated. When a ratio of 70% oil heat treated particles was used, both the physical and mechanical properties were reduced drastically, due to bonding interference caused by excessive oil content. Particleboard made with a ratio of 5:5 (treated to untreated) exhibited the best physical and mechanical properties.

Download Full-text

Characterization of fast pyrolysis bio-oil properties by near-infrared spectroscopic data

Journal of Analytical and Applied Pyrolysis ◽

10.1016/j.jaap.2018.05.009 ◽

2018 ◽

Vol 133 ◽

pp. 9-15 ◽

Cited By ~ 9

Author(s):

Torbjörn A. Lestander ◽

Linda Sandström ◽

Henrik Wiinikka ◽

Olov G.W. Öhrman ◽

Mikael Thyrel

Keyword(s):

Spectroscopic Data ◽

Near Infrared ◽

Fast Pyrolysis ◽

Bio Oil ◽

Infrared Spectroscopic

Download Full-text

Synthesis and characterization of epoxy resins from fast pyrolysis bio-oil

Green Materials ◽

10.1680/jgrma.17.00038 ◽

2018 ◽

Vol 6 (2) ◽

pp. 76-84 ◽

Cited By ~ 5

Author(s):

Mehul Barde ◽

Sushil Adhikari ◽

Brian K Via ◽

Maria L Auad

Keyword(s):

Epoxy Resins ◽

Fast Pyrolysis ◽

Synthesis And Characterization ◽

Bio Oil

Download Full-text

Production and Characterization of the Bio-Oil Obtained by the Fast Pyrolysis of Spent Coffee Grounds of the Soluble Coffee Industry

Journal of the Brazilian Chemical Society ◽

10.21577/0103-5053.20190059 ◽

2019 ◽

Author(s):

Maurício Krause ◽

Adriana Moitinho ◽

Luiz Fernando Ferreira ◽

Ranyere de Souza ◽

Laiza Krause ◽

...

Keyword(s):

Fast Pyrolysis ◽

Spent Coffee Grounds ◽

Coffee Grounds ◽

Bio Oil ◽

Soluble Coffee

Download Full-text

Preparation of High Heating Value Gas, High Quality Bio-Oil and Added Value Carbon Materials from Caragana Pyrolyzed via Super-High Temperature Steam

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.512-515.2152 ◽

2012 ◽

Vol 512-515 ◽

pp. 2152-2161

Author(s):

Jun Li Liu ◽

Jian Chun Jiang ◽

Wei Hong Yang

Keyword(s):

High Temperature ◽

Liquid Fraction ◽

Biomass Energy ◽

Added Value ◽

Gas Composition ◽

Heating Value ◽

High Heating Value ◽

Bio Oil ◽

High Temperature Steam

Caragana is an abundant plant as the feedstock of biomass energy in China. In this study, pyrolysis of Caragana in the presence of high temperature medium and characterization of products has been carried out. Evaluation of experimental results showed that faster devolatilization and char with increased surface area obtained in the presence of high temperature steam comparing to N2. Analysis of the obtained liquid revealed that the H/C and O/C ratios in the liquid are 1.5 and 0.16 respectively. Further more gas composition during high temperature steam pyrolysis differs from gas composition derived from N2pyrolysis which indicates interaction of steam with vapors and solid species even at low treatment temperatures. The derived products’ yields and characteristics indicate possible exploitation of derived char as activate carbon precursor. Liquid fraction composition makes it suitable for exploitation as liquid fuel and/or chemical feedstock.

Download Full-text