The effect of chemical reaction kinetic parameters on the bench-scale pyrolysis of lignocellulosic biomass

Ding, Yanming; Ezekoye, Ofodike A.; Zhang, JiaQing; Wang, Changjian; Lu, Shouxiang

doi:10.1016/j.fuel.2018.05.140

Cited by 82 publications

(23 citation statements)

References 30 publications

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“…The optimized parameters could be used in the pyrolysis reactor design and numerical simulation. Our previous study proved the applicability of optimized parameters in the pyrolysis model coupled with mass and heat transfer [32] and even the complicated direct combustion process in the field of numerical simulation [33].…”

Section: Estimation Of Kinetic Parameters By Scementioning

confidence: 74%

Energy Utilization of Algae Biomass Waste Enteromorpha Resulting in Green Tide in China: Pyrolysis Kinetic Parameters Estimation Based on Shuffled Complex Evolution

2020

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Enteromorpha is a species of algae biomass that is spread widely and has resulted in green tides in China in recent years. It was urgent to explore an appropriate method for taking advantage of the ocean waste as an energy supply in the current sustainable development. Pyrolysis, as the first step of thermochemical conversion in energy utilization, was given attention in order to study its behavior based on thermogravimetric experiments over a wide heating-rate range from 5 to 60 K/min. The whole pyrolysis process was divided into three stages: water evaporation, the main components decomposition, and carbonate decomposition. To estimate the detailed kinetic parameters (activation energy, the pre-exponential factor, and reaction order etc.), the Kissinger method was used to establish the original kinetic parameters at different stages and provide the parameter search range for the next heuristic algorithm, and then the Shuffled Complex Evolution optimization algorithm was coupled and first applied to the algae biomass pyrolysis. Eventually, the predicted results of mass loss rate based on the optimized kinetic parameters agreed well with the thermogravimetric experimental data, with the R 2 value being up to 0.92 for all the heating rates.

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Section: Estimation Of Kinetic Parameters By Scementioning

confidence: 74%

Energy Utilization of Algae Biomass Waste Enteromorpha Resulting in Green Tide in China: Pyrolysis Kinetic Parameters Estimation Based on Shuffled Complex Evolution

2020

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“…With the increase of tunnel mileage, the driving density of vehicles will also be increased, so the tunnel safety becomes increasingly serious. Fire is one of the disasters, which may occur in the tunnel, as the vehicles always carry a lot of solid, liquid, and gaseous combustibles . When a fire occurs in the tunnel, because of its long‐narrow structure, hot smoke will quickly spread throughout the tunnel, and it will be difficult to be discharged in time .…”

Section: Introductionmentioning

confidence: 99%

“…Fire is one of the disasters, which may occur in the tunnel, [9][10][11][12][13][14][15][16][17][18][19][20] as the vehicles always carry a lot of solid, liquid, and gaseous combustibles. [21][22][23] When a fire occurs in the tunnel, because of its long-narrow structure, hot smoke will quickly spread throughout the tunnel, and it will be difficult to be discharged in time. [24][25][26][27][28] The toxic gases produced by fire source will seriously affect the evacuation of stranded persons and rescue work of fire department.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on the effects of naturally ventilated shaft and fire locations in urban tunnels

Fan

Chen

Mao³

et al. 2019

Fire and Materials

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Summary In more and more tunnels, natural ventilation mode with vertical shafts has been gradually employed. However, there are few studies investigating the influences of fire and shaft positions on natural ventilation performance currently. Therefore, this study investigated the effects of the transverse distance from fire source to tunnel sidewall, the longitudinal distance from fire source to shaft, and the transverse distance from shaft to sidewall on natural ventilation effectiveness in a tunnel fire by using Fire Dynamics Simulator. The typical characteristic parameters of smoke, such as mass flow rate, temperature distribution, and velocity vector were analyzed; besides, the phenomenon of plug‐holing was discussed. The results have shown that the mass flow rate of gas exhausted by the shaft decreases slightly with the increase of longitudinal distance from fire source to shaft. When the longitudinal distance from fire source to shaft is constant, changing the transverse distance from shaft to sidewall will have a more obvious effect on the effectiveness of exhausting smoke than changing the transverse distance from fire source to sidewall; in addition, the phenomenon of plug‐holing is more serious when the shaft is close to the sidewall.

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“…Flame spread over solid fuels has been extensively investigated in recent years . Among them, several investigations are focused on the effect of high pressure on flame spread characteristics of solid fuel.…”

Section: Introductionmentioning

confidence: 99%

“…Flame spread over solid fuels has been extensively investigated in recent years. [1][2][3][4] Among them, several investigations are focused on the effect of high pressure on flame spread characteristics of solid fuel. Such as McAlevy and Magee 5 have described a theoretical and experimental research of flame spread over surfaces of polystyrene and polymethylmethacrylate (PMMA) in pressures between 4 and 415 psia.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on flame spread along fuel cylinders in high pressures

et al. 2019

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Summary Flame spread over solid fuels in high‐pressure situations, such as nuclear containment shells during a pressurized period, has potential to result in catastrophic disaster, thus requiring further knowledge. This paper experimentally reveals the flame spread behaviors over fuel cylinders in high pressures. Polyethylene and polymethyl‐methacrylate cylinders with the diameter of 4.0 mm are used in this study. Ambient gas is air, and total pressures are varied from naturally normal pressure (100 kPa) to elevated pressure (500 kPa). Flame characteristics including flame appearance and flame size and burning rate and flame spread rate are investigated. Results show that in high pressure, the flame appearance is significantly affected. As the pressure increases, the blue flame disappeared, and the color of flame tip changes from luminous yellow to orange as well the orange part extends down towards the base of flame. The dimensionless flame height increases with pressure for pressure below 150 kPa and then decreases with pressure above that level. The burning rates show increasing trend with pressure and are proportional to P0.6 and P0.79 for polymethyl‐methacrylate and polyethylene, respectively. Besides, flame spread rates for polymethyl‐methacrylate and polyethylene both were found to be proportional to P0.5.

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The effect of chemical reaction kinetic parameters on the bench-scale pyrolysis of lignocellulosic biomass

Cited by 82 publications

References 30 publications

Energy Utilization of Algae Biomass Waste Enteromorpha Resulting in Green Tide in China: Pyrolysis Kinetic Parameters Estimation Based on Shuffled Complex Evolution

Energy Utilization of Algae Biomass Waste Enteromorpha Resulting in Green Tide in China: Pyrolysis Kinetic Parameters Estimation Based on Shuffled Complex Evolution

A numerical study on the effects of naturally ventilated shaft and fire locations in urban tunnels

Experimental study on flame spread along fuel cylinders in high pressures

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