Study on Reducing the Volatile Organic Compounds Emissions from Different Processing Particleboards

The aim of this paper is to study on how to control VOC emissions from wood-based panel manufacturing. Total volatile organic compounds (TVOC) emissions from larch particleboard under different processing conditions were collected by an environmental chamber. VOC samples were prepared by desiccator, adsorbed by activated carbon, desorpted with Methylene dichloride and measured by GC/MS. The result showed that the optimal process parameters were single-layer structure, moisture content of 6%, density of 0.60 g•cm-3, thickness of 8mm, resin content of 7%, hot-pressing time of 4min.TVOC increased with board density going up，hot-pressing time increasing, moisture content and resin content rising. The predominant compounds emissions from the particleboards are aromatic compound and hydrocarbon. 24 kinds of compounds were identified from the standard board. With hydrocarbon decreasing, aromatic VOC type increased.

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Volatile Organic Compounds Emissions of Particleboards in Response to Processing Parameters

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.943 ◽

2011 ◽

Vol 250-253 ◽

pp. 943-946

Author(s):

Yu Liu ◽

Jun Shen ◽

Xiao Dong Zhu

Keyword(s):

Moisture Content ◽

Organic Compounds ◽

Single Layer ◽

Processing Parameters ◽

Board Density ◽

Voc Emissions ◽

Volatile Organic ◽

Panel Type ◽

Positive Effect ◽

Selection Of

The purpose of this study is to reveal the concentration variations of VOC concentrations of larch particleboards with different processing parameters. The mat moisture content (MC), panel type and density were chosen as the influencing factors to investigate the VOC emissions after processing, and consequently provide basic guideline for the selection of processing parameters of particleboards to control the pollutants. 1m3 environmental chamber and portable VOC monitor were used for VOC sampling and analysis. The results showed that these factors had significant impact on VOC concentrations. The increase of MC, board panel and density had a positive effect on VOC emissions. With the MC and board density various in the ranges from 6%-14% and 0.60-0.80 g·cm-3, the TVOC concentrations increased 42.6% and 74.7% separately. The three layers particleboard had the higher concentration than the single layer particleboard.

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Characteristics of TVOC, Aldehydes and Ketones Emitted from Fiber Hot-Pressing in Manufacturing of MDF made from Poplar and Pine

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.567.9 ◽

2013 ◽

Vol 567 ◽

pp. 9-13

Author(s):

Y.L. Wang ◽

Zhi Gang Lu ◽

P.P. Zhang ◽

Han Dong Zhou

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Hot Pressing ◽

Medium Density Fiberboard ◽

Production Capacity ◽

Saturated Hydrocarbons ◽

Volatile Organic ◽

Aldehydes And Ketones ◽

Main Components ◽

Total Volatile Organic Compounds

This study, by means of GC-MS and HPLC, investigated the characteristics of volatile organic compounds (VOCs) released from fiber hot-pressing in a medium density fiberboard (MDF) production line with a production capacity of 80,000 m3/a. The quantity of total volatile organic compounds (TVOC), aldehydes and ketones were calculated. The results showed that the concentration of TVOC reached 1.8940 mg/m3. The main components include terpenes, acrolein and acetone, benzenes series and saturated hydrocarbons. The concentration of the mixture of aldehydes and ketones was 5.1136 mg/m3.

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Fingerprinting of volatile organic compounds for quick assessment of vigour status of seeds

Seed Science Research ◽

10.1017/s0960258520000252 ◽

2020 ◽

Vol 30 (2) ◽

pp. 112-121 ◽

Cited By ~ 1

Author(s):

R. Umarani ◽

M. Bhaskaran ◽

C. Vanitha ◽

M. Tilak

Keyword(s):

Molecular Weight ◽

Volatile Organic Compounds ◽

Moisture Content ◽

Organic Compounds ◽

Low Molecular Weight ◽

Organic Substances ◽

Seed Deterioration ◽

Volatile Organic ◽

Quick Assessment ◽

Storage Reserves

AbstractSeed is a fertilized mature ovule, which possesses an embryonic plant. When the dry, mature seeds are subjected to imbibition, they release a wide range of organic substances, which include low molecular weight carbonyl compounds (gases and volatiles) and water-soluble organic substances (enzymes and polysaccharides). The volatile organic compounds (VOCs) are molecules of low molecular weight (300 g mol−1) and high vapour pressure (0.01 kPa at 20°C) and include diverse chemical compounds. The nature and emission kinetics of volatiles produced from seeds vary, depending on the moisture content of the seeds. Orthodox seeds stored at ‘low seed moisture content’ undergo seed deterioration, predominantly due to lipid peroxidation, initiated by autoxidation or enzymatic oxidation of unsaturated or polyunsaturated fatty acids. This peroxidation leads to emission of volatile compounds. The quantity of VOCs emitted is positively correlated with the advancement of seed deterioration. With respect to the seed germination process, exposure of seeds to ‘high moisture conditions’ leads to increased respiration, triggers glycolysis and mobilization of storage reserves, resulting in the emission of volatile metabolic products. The quantity of VOCs emitted on commencement of metabolic activity in germinating seeds depends on (1) vigour status and (2) amount of storage reserves. Since it has been established that there is a significant difference between high and low vigour seeds with respect to quantity and profile of VOCs emitted, there is great potential for utilizing the VOC profile to obtain a quick and reproducible test of vigour status of crop seeds. In order to harness the VOC profile for quick assessment of vigour status of seeds, research has to be taken up to develop standard protocols for fingerprinting of VOCs for the purpose of seed vigour assessment and to fix the standard volatile biomarker(s) specific to crop and vigour status of seeds.

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Identification and analysis of odor-active compounds from Choerospondias axillaris (Roxb.) Burtt et Hill with different moisture content levels and lacquer treatments

Scientific Reports ◽

10.1038/s41598-020-71698-0 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Qifan Wang ◽

Jun Shen ◽

Bin Zeng ◽

Huiyu Wang

Keyword(s):

Volatile Organic Compounds ◽

Moisture Content ◽

Organic Compounds ◽

Inhibitory Effect ◽

Waterborne Coating ◽

Active Compounds ◽

Antiseptic Solution ◽

Volatile Organic ◽

Gas Chromatography Mass Spectroscopy ◽

Total Volatile Organic Compounds

Abstract The problem of indoor odors can greatly affect a room’s occupants. To identify odorants and comprehensively evaluate emissions from wooden materials, emissions and odors from Choerospondias axillaris (Roxb.) Burtt et Hill with different moisture content percentages and lacquer treatments were investigated in this study. Thermal desorption–gas chromatography–mass spectroscopy/olfactometry was used to analyze the release characteristics. In total, 11 key odor-active compounds were identified as moisture content gradually decreased, concentrating between 15 and 33 min. Total volatile organic compounds, total very volatile organic compounds, and total odor intensity decreased as moisture content decreased. In addition, 35 odor-active compounds, including aromatics, alkenes, aldehydes, esters, and alcohols, were identified in the odor control list. Polyurethane (PU), ultraviolet (UV), and waterborne coatings had a good inhibitory effect on eight odor characteristics, but some scents arose after lacquer treatment. For equilibrium moisture content, the major characteristics of Choerospondias axillaris were fragrant (9.4) and mint-like (3.0) compared with the fragrant (8.2), fruity (7.8), and pleasant (5.8) characteristics of PU coating; the flowery (5.9), fragrant (5.0), glue-like (4.3), and pineapple-like (4.3) characteristics of UV coating; and the antiseptic solution (3.6), fragrant (2.9), cigarette-like (2.8), and fruity (2.5) characteristics of waterborne coating. Based on multicomponent evaluation, a Choerospondias axillaris board with waterborne coating was suggested for use indoors.

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Study on the Volatile Organic Compounds (VOC) Emission of Wood Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.113-116.474 ◽

2010 ◽

Vol 113-116 ◽

pp. 474-478 ◽

Cited By ~ 1

Author(s):

Wen Chao Zhang ◽

Jun Shen ◽

Feng Chen

Keyword(s):

Organic Compounds ◽

Hot Pressing ◽

High Flow ◽

Resin Content ◽

Wood Composites ◽

Particle Board ◽

Pressing Temperature ◽

Volatile Organic ◽

Rapid Dissemination ◽

Environment Chamber

In this paper, TVOC emission of veneered wood-based panel and coating processing was systematically discussed. The results showed that resin content and hot-pressing temperature of veneered wood-based particle board had obvious impact on TVOC releasing. When velocity of flow was 0.02 m/s, after 10 hours experiment, TVOC concentration in the environment chamber was 263μg/m3. While velocity of flow 0.04m/s, TVOC concentration was 29 μg/m3. High-flow velocity was helpful for rapid dissemination of TVOC. The research also found after 10 hours experiment, concentration of TVOC in environment chamber is 31μg/m3, 220μg/m3 and 400μg/m3 corresponding amount of paint was 20g, 40g and 60g. The thicker the layer was, the longer the time of layer dehumidification and TVOC diffusion needed.

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