Investigation on microwave torrefaction: Parametric influence, TG-MS-FTIR analysis, and gasification performance

Yan, Beibei; Jiao, Liguo; Li, Jian; Zhu, Xiaochao; Ahmed, Sarwaich; Chen, Guanyi

doi:10.1016/j.energy.2021.119794

Cited by 47 publications

(11 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The herb residue was thermally pre-treated with microwave technology, and it was found that the energy yield of the herb residue was increased by 85.813% while processing the residue at 225 • C for 8.55 min. [13]. However, the proposed method was found to be relatively less effective than the quasi-static approach used for processing raw pine [14].…”

Section: Introductionmentioning

confidence: 88%

Modelling of a Torrefaction Process Using Thermal Model Object

Dhaundiyal

Tóth

2021

Energies

View full text Add to dashboard Cite

So far, the torrefaction process has been merely discussed based on the physical and chemical characteristics of the final product, but the mechanism has not been yet pondered and investigated. Thus far, microwave torrefaction has been predominately used for thermal pre-treatment; therefore, a paradigm shift in the methodology has been introduced by using a Joule heating system. The article mainly focuses on the thermal engineering aspect of the torrefaction process. The densified black pine underwent thermal pre-treatment at a temperature of 523 K. The furnace used for torrefaction was initially improvised to carry out thermal degradation at quasi-static/dynamic conditions. A 3D PDE thermal model was developed to determine the numerical solution and temperature distribution across a black pine pellet. To compare the effect of the linear ramping profile, time-dependent as well as fixed Dirichlet conditions were applied to the proposed model. The mass distribution, duration of the torrefaction process, the effect of Nusselt and Reynold’s number of inert gas, and thermal history are some of the factors whose influence on the numerical solution was investigated. The simulation of thermal pre-treatment and its effect on the heat transfer characteristic was examined with help of a PDE thermal model, whereas the numerical solution of diffusion of the product of reactions was determined by solving the partial differential equations with the help of the discretisation method (PDEPE). The densification of black pine was performed in a ring die, whereas initial milling of biomass was carried out using a 1.5 mm sieve size. The system was found to have a homogeneous distribution in energy and temperature with time, whereas the amplitude of heat flux along the radial direction was reduced by 15% if the same pellet underwent torrefaction for a duration of 5 min in dynamic mode. Similarly, a 64.46% drop in amplitude of heat flux along the azimuth plane could be seen while performing torrefaction in a time-dependent thermal history. However, the relative amplitude of the heat flux at the centre of the pellet was estimated to be lowered by 98.41% along the vertical axis for heating a pellet in a quasi-static condition. The net change in the mass fraction of carbon dioxide across the boundary film was seen to be 40% higher than that of carbon monoxide. The rate of change of mass fraction of carbon monoxide across the boundary film was increased by 7–11% with the increase in torrefaction time. A 6.8% rise in the evaporation of water was noticed during the first half interval of torrefaction (from 5 min to 10 min). In the second half, from 10 min to 15 min, it was merely increased by 5.8%. A relative drop of 17.24% in water evaporation was estimated in the dynamic state of the system.

show abstract

Section: Introductionmentioning

confidence: 88%

Modelling of a Torrefaction Process Using Thermal Model Object

Dhaundiyal

Tóth

2021

Energies

View full text Add to dashboard Cite

show abstract

“…However, this moisture percentage is considered low, and conditions, to the contrary, are not conducive to pyrolysis. Adequate thermal pre-treatment is recommended in such cases [7]. Each sample exhibited distinct temperature ranges for the degradation of lignocellulosic components (hemicellulose, cellulose, and lignin), considering their specific characteristics.…”

Section: Biomass Characterizationmentioning

confidence: 99%

“…Lignocellulosic waste has been identified as an attractive feedstock for fuel production due to its potential for zero CO2 emissions, abundant availability, and low cost. Biofuel is considered carbon-neutral and has garnered attention as a potential renewable energy source, alongside its capacity to mitigate greenhouse gas emissions [6][7][8]. Consequently, the biomass composition is crucial in assessing the generated products and their properties.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Lignocellulosic Biomasses for Pyrolysis Product Generation

Meire Ane Pitta da Costa,

Valter Doria Rocha Neto,

Maria Karolaine Barbosa de Matos

et al. 2024

JBTH

View full text Add to dashboard Cite

This study aimed to assess agroindustrial residues, namely acerola seeds, poultry litter, bean pods, corn cobs, coconut fiber, pine nut shells, peanut shells, pine, and passion fruit, for the production of pyrolysis products, thereby adding value to these environmental assets. The characterization of these biomasses was carried out through elemental analysis (CHN), thermogravimetry (TG), higher heating value (HHV), ash content, and protein content determination. The samples exhibited low ash content (1.04% to 11.92%), protein content (1.22% to 15.06%), and moisture content (7.82% to 15.31%). Thermogravimetric analysis revealed that compound degradation occurred between 115°C and 500°C, with higher heating values (16.73% to 19.94 MJ.kg⁻1), indicating strong applicability in pyrolysis processes.

show abstract

“…EGA-MS and a tube furnace indicated most syngas were produced at 250–380 °C, and the reactions were slowed down under the Tibetan atmosphere. Results provided insights into using gasification for treating herb residue and even the environment-sustainably of other wastes in Tibet [ 252 , 253 ].…”

Section: Applications To Environment and Healthmentioning

confidence: 99%

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

et al. 2022

View full text Add to dashboard Cite

Advances in on-line thermally induced evolved gas analysis (OLTI-EGA) have been systematically reported by our group to update their applications in several different fields and to provide useful starting references. The importance of an accurate interpretation of the thermally-induced reaction mechanism which involves the formation of gaseous species is necessary to obtain the characterization of the evolved products. In this review, applications of Evolved Gas Analysis (EGA) performed by on-line coupling heating devices to mass spectrometry (EGA-MS), are reported. Reported references clearly demonstrate that the characterization of the nature of volatile products released by a substance subjected to a controlled temperature program allows us to prove a supposed reaction or composition, either under isothermal or under heating conditions. Selected 2019, 2020, and 2021 references are collected and briefly described in this review.

show abstract

Investigation on microwave torrefaction: Parametric influence, TG-MS-FTIR analysis, and gasification performance

Cited by 47 publications

References 47 publications

Modelling of a Torrefaction Process Using Thermal Model Object

Modelling of a Torrefaction Process Using Thermal Model Object

Evaluation of Lignocellulosic Biomasses for Pyrolysis Product Generation

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

Contact Info

Product

Resources

About