scholarly journals Pine Wood Particles Pyrolysis and Radiographic Analysis

2020 ◽  
Vol 71 (1) ◽  
pp. 13-18
Author(s):  
Paweł Kazimierski ◽  
Sara Vieira ◽  
Dariusz Kardaś

The goal of this experiment is to assess the mass and volume loss of medium size pine wood particles undergoing pyrolysis. Wood samples of different sizes and shapes were pyrolysed at 500 ºC with different residence times. A thermogravimetric analysis was carried out for comparison purposes. Finally, the pyrolysed samples were analysed using radiographic methods. A connection between the different analyses was found. For larger particles, the heating rate is lower, and a time gap between hemicellulose and cellulose thermal decomposition was noticed. Research shows that an important part of the analysis of the process is the rate of biomass heating and sample size. As the sample size increases, the pyrolysis time increases; however, the increase is not linear. The publication also shows the great possibilities of radiographic methods in analysing the pyrolysis process.

2020 ◽  
Vol 10 (5) ◽  
pp. 545-565
Author(s):  
Teresa Hurley ◽  
Corinne Faure ◽  
Seamus Kelly

PurposeThis quantitative research paper examined factors influencing re-engagement intentions and re-engagement behavior of lapsed health club members and identified which sales promotion incentives are most effective in re-engaging this lapsed member market. While previous studies examined re-engagement intentions and re-engagement behavior in isolation, no research could be located which examined both simultaneously and the impact of promotion incentives in the health and fitness industry.Design/methodology/approachStudy A (mail survey) examined re-engagement intentions of one hundred lapsed members of a medium size suburban health club. Study B (an experimental field study) measured actual true re-engagement behavior using price and gift token as incentives to re-engage 300 lapsed members of the same health club. Ten hypotheses were tested using chi-square, logistic regression and correlation analysis.FindingsResults indicate that price is the most influential incentive in promoting re-engagement intentions, while the experimental field study tested this survey finding and reported that although incentives were more effective than nonincentives in terms of re-engagement behavior, price played a far greater significant role than gift token in actual re-engagement behavior of lapsed members. Highly satisfied customers are likely to have stronger re-engagement intentions with frequent attendees more influenced by price in terms of re-engagement intentions, while those who lapsed most recently demonstrated stronger re-engagement behavior.Research limitations/implicationsStudy A: While acknowledging that the sample size was limited, a respectable response rate of 49% was recorded for the mail survey in Study A but a greater response rate and larger sample size would have allowed for a more comprehensive analysis. However, the study is primarily exploratory in nature and serves to achieve the objectives of the research. The study was based on a medium size suburban health club, therefore no comparisons can be drawn between the results of this study and that involving larger health clubs, chains, urban clubs or those outside of Ireland. Although the inclusion of moderating effects was considered, it was not feasible to develop these interactions due to the limited sample size. Study B: Generalization of the findings in this study with other international markets is not possible due to differences in demographic factors, promotions and differences in the health and fitness industry. No comparison can be drawn either between health clubs which operate in a different environment, such as public or nonmembership-based clubs, urban clubs or those constituting a chain. While the offer incentives were of equal value, it is recognized that the gift token may have appealed more to females than to males.Practical implicationsHealth clubs should consider changing strategic focus, from being overly concentrated on new customer acquisition to actively re-engaging the lapsed member market by finding out why they left and offer an incentive such as price to re-engage. Although loyalty, duration, age, gender and income were found not to be significant in this study, satisfaction, frequency and recency of lapse were significant. Therefore, health clubs should strive to keep members satisfied, monitor and increase frequency of attendance with creative programming and commence the re-engagement process prior to the membership expiry so as to maximize re-engagement and customer retention using price discount as an incentive.Originality/valueThe originality of this study is that is tests statistically consumer re-engagement intentions and actual re-engagement behavior simultaneously in a health club setting using a mail survey in Study A and Experimental Design in Study B.


Holzforschung ◽  
2016 ◽  
Vol 70 (9) ◽  
pp. 895-900 ◽  
Author(s):  
Bernhard Widhalm ◽  
Thomas Ters ◽  
Ewald Srebotnik ◽  
Cornelia Rieder-Gradinger

Abstract Aldehydes and terpenes are the most frequently emitted volatile organic compounds (VOCs) in the wood-processing industry. These emissions are classified as injurious to health and hazardous to the environment. To address this problem, the growth conditions have been identified under which bacteria extensively degrade both aldehydes and particularly terpenes in pine wood particles as a raw material for the production of particle boards. In this study, the focus was on pentanal and hexanal (aldehydes) as well as α- and β-pinene (terpenes). Bacterial strains were selected for their ability to metabolize α-pinene as single carbon source in liquid culture medium. α-Pinene degradation was then determined by gas chromatography (GC) analysis. Strains belonging to the genus Pseudomonas showed the best results (98% degradation after 72 h). Comparably good results were also achieved with the thermophilic strain Bacillus pallidus (90% degradation) at 55°C. Furthermore, an adapted mixed culture of Pseudomonas species was inoculated onto wood particles and incubated at room temperature for 3 days. Solid-phase microextraction (SPME) measurements of emitted volatiles and subsequent gas chromatography-mass spectrometry (GC-MS) analysis indicated a complete removal (100%) of aldehydes and, even more importantly, α- and β-pinene. Pre-treatment of unsterile pine wood particles with Pseudomonas species may have potential for industrial application.


2002 ◽  
Vol 65 (2) ◽  
pp. 173-184 ◽  
Author(s):  
L.F de Diego ◽  
F Garcı́a-Labiano ◽  
A Abad ◽  
P Gayán ◽  
J Adánez

Holzforschung ◽  
2015 ◽  
Vol 69 (4) ◽  
pp. 463-469 ◽  
Author(s):  
Daniel Stratev ◽  
Eva Günther ◽  
Johannes Steindl ◽  
Thomas Kuncinger ◽  
Ewald Srebotnik ◽  
...  

Abstract Pine wood particles were treated with effluents from the wood-board manufacturing industry or from a communal clarification plant, and the effect of these treatments on aldehyde emissions of wood material was tested. Pine wood strands were treated in the same manner and strand boards were produced from the treated material on a laboratory scale. The 28-day volatile organic compound emissions of the boards were determined in a microchamber using Tenax-TDAS/GC-MS analytics. Boards made from treated strands exhibited significantly lower aldehyde emissions compared to control boards. Analyses of microflora and of wood extractives confirmed that microbial metabolism in industrial effluents consumed unsaturated fatty acids (UFAs) present in wood. As UFAs are the source of aldehyde emissions due to auto-oxidation, the aldehyde emission was consequently reduced. A routine treatment of wood raw material with properly chosen industrial effluents may therefore be regarded as a cost-reducing and efficient method for the utilisation of industrial waste waters.


1997 ◽  
Vol 43 (1) ◽  
pp. 27-39 ◽  
Author(s):  
R. Bilbao ◽  
J. Arauzo ◽  
M.B. Murillo ◽  
M.L. Salvador

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