Effect of conditions on fast pyrolysis of bamboo lignin

Lou, Rui; Wu, Shubin; Lv, Gaojin

doi:10.1016/j.jaap.2010.08.007

Cited by 76 publications

(42 citation statements)

References 16 publications

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“…The yields of aldehydes, ketones and furans rose in contrast to acids and alcohols at higher temperatures. These results are similar to the report of Lou et al [13]. He found that the lower temperature (250-400 °C) pyrolysis products of enzymatic/mild acidolysis lignin were mainly 2,3-dihydrobenzofuran, while at 400-800 °C, phenols were the main products.…”

Section: The Effects Of Pyrolysis Temperature and Timesupporting

confidence: 91%

Fast Pyrolysis of Four Lignins from Different Isolation Processes Using Py-GC/MS

et al. 2015

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Pyrolysis is a promising approach that is being investigated to convert lignin into higher value products including biofuels and phenolic chemicals. In this study, fast pyrolysis of four types of lignin, including milled Amur linden wood lignin (MWL), enzymatic hydrolysis corn stover lignin (EHL), wheat straw alkali lignin (AL) and wheat straw sulfonate lignin (SL), were performed using pyrolysis gas-chromatography/mass spectrometry (Py-GC/MS). Thermogravimetric analysis (TGA) showed that the four lignins exhibited widely different thermolysis behaviors. The four lignins had similar functional groups according to the FTIR analysis. Syringyl, guaiacyl and p-hydroxyphenylpropane structural units were broken down during pyrolysis. Fast pyrolysis product distributions from the four lignins depended strongly on the lignin origin and isolation process. Phenols were the most abundant pyrolysis products from MWL, EHL and AL. However, SL produced a large number of furan compounds and sulfur compounds originating from kraft pulping. The effects of pyrolysis temperature and time on the product distributions from corn stover EHL were also studied. At 350 °C, EHL pyrolysis mainly produced acids and alcohols, while phenols became the main products at

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Section: The Effects Of Pyrolysis Temperature and Timesupporting

confidence: 91%

Fast Pyrolysis of Four Lignins from Different Isolation Processes Using Py-GC/MS

et al. 2015

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“…The needles emission measurements are performed using a flash pyrolysis apparatus (CDS Pyroprobe 5150). This device is widely used to characterize the thermal degradation of various materials [9][10][11]. Needle samples with an average mass of 2.3 mg are placed inside a 40 mm x 2 mm i.d.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Experimental determination of volatile organic compounds emitted byThymus vulgaris

Chetehouna

Courty

Lemée

et al. 2012

Modelling, Monitoring and Management of Forest Fires III

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Thymus vulgaris is a common Mediterranean vegetal species often involved in forest fires. The aim of this work is to characterize the VOCs emitted by the needles of this plant as functions of temperature. Experiments are performed using a flash pyrolysis apparatus. The influence of two parameters, namely the heating time and heating rate are studied: the highest VOCs' emissions are found for a heating time of 30 s at 5000 K/s. Two major compounds are identified for all the temperatures, thymol and p-cymene. The total amount of VOCs emitted increases with temperature and except for the three lowest temperatures, thymol represents more than 50% of the gas mixture. Results are compared to literature available data and to the emissions behaviour of other vegetal species.

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“…Bamboo is composed of hemicellulose, cellulose, and lignin (Dong and Xiong 2014). Bamboo lignin depolymerization leads to the industrial production of valuable industrial and food products, such as vanillin, vinylguaiacol, optically active lignans, ferulic acid, and monolignol dimers (Lou et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Low-Power Microwave Radiation-assisted Depolymerization of Ethanol Organosolv Lignin in Ethanol/Formic Acid Mixtures

Duan

Zhao

et al. 2017

BioResources

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Ethanol organosolv lignin separated from bamboo was depolymerized by low-power microwave radiation (~80 W) using ethanol as a swelling agent and formic acid as a hydrogen donor solvent. After increasing the temperature from 100 to 200 °C, the total amount of phenolic compounds in the products increased from 8.1% to 40.8%, and both the weight average molecular weight (Mw) and number average molecular weight (Mn) of the products from the lignin depolymerization decreased. With extended reaction time from 20 to 60 min, the total amount of phenolic compounds and molecular weight did not remarkably change. In addition, Fourier transform infrared (FT-IR) spectroscopy showed that oxidative fracture was the primary way that lignin depolymerized. The severity factor played an important role in converting lignin into small molecular substances, and the evaluation showed that the microwave temperature was more influential on the lignin depolymerization than the reaction time. Because depolymerization and repolymerization of fragments both occurred during the microwave radiation process, it is critical to inhibit repolymerization of degraded fragments for the efficient degradation of lignin. This study not only provides a theoretical basis for studying the mechanism of microwave-assisted lignin degradation but is also important for the determination of a cost-effective lignin depolymerization method.

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Effect of conditions on fast pyrolysis of bamboo lignin

Cited by 76 publications

References 16 publications

Fast Pyrolysis of Four Lignins from Different Isolation Processes Using Py-GC/MS

Fast Pyrolysis of Four Lignins from Different Isolation Processes Using Py-GC/MS

Experimental determination of volatile organic compounds emitted byThymus vulgaris

Low-Power Microwave Radiation-assisted Depolymerization of Ethanol Organosolv Lignin in Ethanol/Formic Acid Mixtures

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