Thermogravimetric Analysis–Fourier Transform Infrared Spectroscopy Study on the Effect of Extraction Pretreatment on the Pyrolysis Properties of Eucalyptus Wood Waste

Abstract

Eucalyptus wood is one of the important hardwood resources with attractive properties of rapid growth and good quality, which are widely used for the manufacture of wood-based boards, furniture, pulp and paper, and so on. In order to explore the potential of sawdust waste from the eucalyptus wood furniture factory as a bioenergy feedstock, its pyrolysis properties after different solvent extractions were examined using thermogravimetric analysis coupled with Fourier transform infrared spectrometry. The mass ratio of extractives in eucalyptus wood sawdust by benzene–alcohol, hot water, and sodium hydroxide solution was 4.25, 9.68, and 16.11%, respectively. After extraction, the thermal decomposition process of eucalyptus wood was promoted with a higher weight loss rate, lower activation energy, and lower residue content compared to the raw sample without pretreatment, and the promotion level was positively correlated to the strength of extracting solvent. CO 2 , CO, CH 4 , H 2 O, acids, aldehydes, aromatics, ethers, and alcohols were identified as the important intermediates in pyrolysis vapors, which can be tuned by different extraction pretreatments. In terms of typical gas products, benzene–alcohol enhanced the release of carbon dioxide, and hot water enhanced the water generation from dehydration reactions and slightly increased the production of carbon monoxide, while sodium hydroxide promoted the formation of methane at the early stage under 280 °C and later stage over 460 °C during the pyrolysis of eucalyptus wood. It is believed that the extraction pretreatment can not only obtain the bioactive extractive products but also benefit the pyrolysis process by lowering the energy barrier and tuning the composition of pyrolysis products.

Pyrolysis and Combustion Behavior of Flax Straw as Biomass: Evaluation of Kinetic, Thermodynamic Parameters, and Qualitative Analysis of Degradation Products

“…Pyrolysis Real-time monitoring of evolved volatiles from the pyrolysis of flax straw biomass was conducted using FTIR at a heating rate of 20 • C min −1 , as shown in Figure 8a,b, displaying diverse peaks within the range of wavenumbers from 650 to 4000 cm −1 . Different decomposition reactions occur during the biomass pyrolysis process, including decarboxylation, decarbonylation, demethylation, demethoxylation, and dehydration in the pyrolysis stage [69]. The primary pyrolysis products identified from flax straw were carboxylic acids, aldehydes, methane, carbon mono and dioxide, alcohols, aromatics, and ethers [70].…”

Entropy analysis and grey correlation coefficient cluster analysis of multiple indexes of 5 kinds of condiments

“…Through retrieval, it is found that the application of thermogravimetric analysis (Bajaj et al, 2020;Chen et al, 2020b;Gong et al, 2021;Ingale et al, 2020;Moseson et al, 2020;Olopade et al, 2020;Porshnov et al, 2020;Pyra et al, 2020;Ren et al, 2020;Wu et al, 2020) technology in the evaluation of condiment combustion stability has not been reported. Therefore, the research on the combustion heat and thermogravimetric analysis of condiments has important theoretical and practical significance,which can make up for the gaps in this area and provide scientific basis and research significance for the study of condiment quality.…”

Inventory Data for the Pyrolysis of Waste Wood

“…2 The liquid product can be further generated into biofuel or used to manufacture highvalue chemicals, and gases can be burned directly to provide a heat source or used to produce syngas. 13 The pyrolysis of biomass material like waste wood can reduce CO 2 emissions 14−16 through the beneficial utilization of its products. However, the technology may also have negative impacts on the environment, 17 such as producing nitrogen oxides.…”

“…Char can be utilized to produce activated carbon, , soil amendment, electrode material, and graphene production . The liquid product can be further generated into biofuel or used to manufacture high-value chemicals, and gases can be burned directly to provide a heat source or used to produce syngas …”