Torrefaction of pelletized corn residues with wet flue gas

Onsree, Thossaporn; Tippayawong, Nakorn; Williams, Travis; McCullough, Katie; Barrow, Elizabeth; Ravindra, Pogaku; Lauterbach, Jochen A.

doi:10.1016/j.biortech.2019.121330

Cited by 54 publications

(17 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At this temperature, the helium gaseous atmosphere (He) was switched to a mixture of water vapor and helium (H 2 O/He, 20% v/v) with the same total flow rate. The moisture content of the gaseous atmosphere was selected to reproduce the typical average moisture content of the torrefaction gases [15,37]. Calculations were performed to check that the chemical regime was reached under these experimental conditions [46].…”

Section: Biomass Samplesmentioning

confidence: 99%

“…These conditions of temperature and pressure drastically differ from those encountered in typical torrefaction, and thus, clearly prevent the drawing of conclusions that are valid for this process [17,[34][35][36] The significant water vapor content of the torrefaction gases may impact biomass solid degradation kinetics in torrefaction, and thus, needs to be considered so as to optimize the process at an industrial scale. Recently, a study considered the torrefaction of corn cob pellets under a flue gas atmosphere composed by a mixture of steam (0- [37]. In this case, the individual effect of each gas of the torrefaction atmosphere was not discussed, but only the effect of the moisture content.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Torrefaction of Woody and Agricultural Biomass: Influence of the Presence of Water Vapor in the Gaseous Atmosphere

et al. 2020

View full text Add to dashboard Cite

Biomass preheating in torrefaction at an industrial scale is possible through a direct contact with the hot gases released. However, their high water-content implies introducing moisture (around 20% v/v) in the torrefaction atmosphere, which may impact biomass thermochemical transformation. In this work, this situation was investigated for wheat straw, beech wood and pine forest residue in torrefaction in two complementary experimental devices. Firstly, experiments in chemical regime carried out in a thermogravimetric analyzer (TGA) showed that biomass degradation started from lower temperatures and was faster under a moist atmosphere (20% v/v water content) for all biomass samples. This suggests that moisture might promote biomass components’ degradation reactions from lower temperatures than those observed under a dry atmosphere. Furthermore, biomass inorganic composition might play a role in the extent of biomass degradation in torrefaction in the presence of moisture. Secondly, torrefaction experiments on a lab-scale device made possible to assess the influence of temperature and residence time under dry and 100% moist atmosphere. In this case, the difference in solid mass loss between dry and moist torrefaction was only significant for wheat straw. Globally, an effect of water vapor on biomass transformation through torrefaction was observed (maximum 10%db), which appeared to be dependent on the biomass type and composition.

show abstract

Section: Biomass Samplesmentioning

confidence: 99%

mentioning

confidence: 99%

Torrefaction of Woody and Agricultural Biomass: Influence of the Presence of Water Vapor in the Gaseous Atmosphere

et al. 2020

View full text Add to dashboard Cite

show abstract

“…For instance, while the torrefaction of hemicellulose leads to more devolatilization and carbonization, the depolymerization of cellulose plays a vital role in the decomposition mechanism. The study on the kinetics of biomass torrefaction is very important because it represents the torrefaction reaction thereby predicting the optimum thermal degradation conditions which can ultimately enhance the process control for continuous torrefaction reactor [39,40]. Meanwhile, at the temperature range of 230-300°C [41], the kinetics of torrefaction reactions can be best described by a two-step mechanism; cellulose and hemicellulose decomposition.…”

Section: Reaction Kinetics Of Biomass Torrefactionmentioning

confidence: 99%

Economics, Sustainability, and Reaction Kinetics of Biomass Torrefaction

Olugbade¹

2021

Biotechnological Applications of Biomass

View full text Add to dashboard Cite

Biomass torrefaction is capable of significantly improving the quality and properties of solid biofuels. It is often referred to as complex reactions involving the decomposition of lignin, cellulose, and hemicellulose as well as moisture evaporation due to several reactions involved. To evaluate the efficiency of the torrefaction process as well as the reactor performance, considering the economics of biomass torrefaction including the total production cost and capital investment, production capacity, feedstock input, feedstock type, pre-treatment, procurement and transportation costs is of high importance. In this Chapter, the economics of torrefaction process will be discussed. In addition, ways to ensure competitiveness of torrefaction technology will be explained provided factors including the use of plant with larger capacity, integrated system features such as pelletization, and moisture content of the feedstock, are properly considered. Thereafter, the concept of sustainability of biomass torrefaction in relation with the environmental factor (sustainable forest management), social factor (revitalization of rural areas), and economic factor (fossil fuels dependence and renewable energy consumption) will be presented.

show abstract

“…In the past decades, biomass conversion processes have been extensively studied for converting biomass into liquid biofuel via gasification (Fan et al 2020 ), pyrolysis (Onsree et al 2018a , 2018b , 2019 ; Onsree and Tippayawong 2020a ), and hydrothermal processing (Kantakanit et al 2018 ). Among these processes, only hydrothermal liquefaction (HTL) can be efficiently applied to convert high moisture content or wet biomass materials generally having a moisture content of more than 50% w/w, such as fresh biowaste, food waste, algal biomass, and wastewater sludge to biocrude oil without a drying requirement.…”

Section: Introductionmentioning

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Torrefaction of pelletized corn residues with wet flue gas

Cited by 54 publications

References 42 publications

Torrefaction of Woody and Agricultural Biomass: Influence of the Presence of Water Vapor in the Gaseous Atmosphere

Torrefaction of Woody and Agricultural Biomass: Influence of the Presence of Water Vapor in the Gaseous Atmosphere

Economics, Sustainability, and Reaction Kinetics of Biomass Torrefaction

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

Contact Info

Product

Resources

About