Catalytic torrefaction of pelletized agro-residues with Cu/Al2O3 catalysts

Tippayawong, Nakorn; Onsree, Thossaporn; Williams, Travis; McCullough, Katie; MacQueen, Blake; Lauterbach, Jochen A.

doi:10.1007/s13399-019-00535-w

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…The difference was clearer for temperatures above 260 °C, and an average difference of approximately 1.3 MPa was maintained. In the mixtures, this may have been due to the initiation of the thermal decomposition of the lignocellulosic biomass at temperatures of about 200 °C, which generated many different substances in the container (Tippayawong et al 2019 ). Higher temperatures increased the thermal decomposition of biomass (Onsree and Tippayawong 2020b ), leading to a more complicated mixture in the batch container.…”

Section: Resultsmentioning

confidence: 99%

Conversion of tobacco processing waste to biocrude oil via hydrothermal liquefaction in a multiple batch reactor

Saengsuriwong

Onsree

Phromphithak

et al. 2021

Clean Techn Environ Policy

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Graphic abstract Fossil fuels are the primary energy source of almost all societies and economies, but it is finite and scarce. The use of non-renewable fossil fuels threatens earth’s environment. At the same time, waste from agricultural and industrial activities is increasing. Most of this waste is discarded or poorly managed, causing many other environmental issues. Converting waste to energy is a promising route to address these challenges. We investigated the hydrothermal liquefaction (HTL) of high moisture content, tobacco-processing waste in a multiple batch thermal reactor to produce biocrude oil. The effects of operating conditions were studied and optimized for maximum liquid biocrude oil yield. HTL operating conditions considered were temperatures from 280 to 340 °C and residence times from 15 to 45 min for a fixed ratio of biomass to deionized water of 1:3. The reaction temperature was found to affect the yields and distribution of products significantly. The maximum yield of the liquid biocrude oil obtained was more than 52% w/w at 310 °C and 15 min. Under these conditions, almost 90% of the energy was recovered in biocrude oil and solid products. The liquid fraction was mainly composed of phenols, ketones, and nitrogenous compounds. This study provides a potential framework for eco-technologies for biomass waste-to-energy conversion with respect to converting tobacco processing residues to liquid biofuels and biochemicals.

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Section: Resultsmentioning

confidence: 99%

Conversion of tobacco processing waste to biocrude oil via hydrothermal liquefaction in a multiple batch reactor

Saengsuriwong

Onsree

Phromphithak

et al. 2021

Clean Techn Environ Policy

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“…28,29 With torrefaction, thermo-chemical decomposition of agro-residues occurs via reactions of dehydration, initial devolatilization, and/or decarboxylation. 30 The three main compounds of lignocellulosic biomass generally respond to this decomposition at different temperature ranges. Hemicellulose is the most sensitive component to the torrefaction process between 220 and 315 C. 31 Cellulose decomposes within 260-410 C, while lignin gradually decomposes from 160 to 900 C. 32 Hence, in this work, tobacco residues thermochemically decomposed between 20-25% w/w at 220 and 260 C by partial decompositions of hemicellulose and lignin except for cellulose, but about 35% w/w at 300 C, when the hemicellulose was almost gone and the other components increasingly degraded.…”

Section: Resultsmentioning

confidence: 99%

Bio-oils from vacuum ablative pyrolysis of torrefied tobacco residues

et al. 2020

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“…Biofuels from conversions of lignocellulosic biomass are expected to be used alongside conventional fuels. 1 , 2 Lignocellulosic biomass is considered a universal carbon resource on the Earth, in which it can be recycled from sunlight to chemical energy via CO 2 and water in the presence of plant photosynthetic systems. 3 , 4 In the past decades, sustainable development, based on biorefining of biomass to produce value-added biochemicals, such as alcohols, furfurals, and organic acids, and to substitute fossil fuels (in views of hydrogen, methane, ethanol, and butanol productions), has increasingly been of considerable interest.…”

Section: Introductionmentioning

confidence: 99%

Compositional analysis of bio-oils from hydrothermal liquefaction of tobacco residues using two-dimensional gas chromatography and time-of-flight mass spectrometry

et al. 2021

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Sustainable energy from biomass is one of the most promising alternative energy sources and is expected to partially replace fossil fuels. Tobacco industries have normally rid their processing residues by landfilling or incineration, affecting the environment negatively. These residues can be used to either extract high-value chemicals or generate bio-energy via hydrothermal liquefaction. The main liquid product or bio-oil consists of highly complicated chemicals. In this work, the bio-oil from hydrothermal liquefaction of tobacco processing residues was generated in a batch reactor at biomass-to-deionized water ratio of 1:3, temperature of 310°C, and 15 min residence time, yielding the maximum liquid products for more than 50% w/w. The liquid products were analyzed, using two-dimensional gas chromatography and time-of-flight mass spectrometry (GC × GC/TOF MS). This technique allowed for a highly efficient detection of numerous compounds. From the results, it was found that hydrothermal liquefaction can cleave biopolymers (cellulose, hemicellulose, and lignin) in tobacco residues successfully. The hydrothermal liquefaction liquid products can be separated into heavy organic, light organic, and aqueous phase fractions. By GC × GC/TOF MS, the biopolymers disintegrated into low molecular weight compounds and classified by their chemical derivatives and functional groups could be detected. The major chemical derivative/functional groups found were cyclic ketones and phenols for heavy organic and light organic, and carboxylic acids and N-containing compounds for the aqueous phase. Additionally, by the major compounds found in this work, simple pathway reactions occurring in the hydrothermal liquefaction reaction were proposed, leading to a better understanding of the hydrothermal liquefaction process for tobacco residues.

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Catalytic torrefaction of pelletized agro-residues with Cu/Al2O3 catalysts

Cited by 11 publications

References 31 publications

Conversion of tobacco processing waste to biocrude oil via hydrothermal liquefaction in a multiple batch reactor

Conversion of tobacco processing waste to biocrude oil via hydrothermal liquefaction in a multiple batch reactor

Bio-oils from vacuum ablative pyrolysis of torrefied tobacco residues

Compositional analysis of bio-oils from hydrothermal liquefaction of tobacco residues using two-dimensional gas chromatography and time-of-flight mass spectrometry

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