scholarly journals Parametric gasification process of sugarcane bagasse for syngas production

2019 ◽  
Vol 44 (31) ◽  
pp. 16234-16247 ◽  
Author(s):  
Abdul Raheem ◽  
Ming Zhao ◽  
Wafa Dastyar ◽  
Abdul Qadir Channa ◽  
Guozhao Ji ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Syngas Production ◽  
Gasification Process

Effect of Steam on Syngas Production in New-Designed Dual-Bed Gasifier

2012 ◽  
Vol 622-623 ◽  
pp. 1125-1129
Author(s):  
Sukrit Pakavechkul ◽  
Prapan Kuchonthara ◽  
Suchada Butnark
Keyword(s):  
Fixed Bed ◽  
Fuel Production ◽  
Heating Value ◽  
Synthetic Fuel ◽  
Syngas Production ◽  
Gasification Process ◽  
Product Gas ◽  
Water Gas ◽  
Fluidized Bed Combustor ◽  
Dual Bed

In this research, the effect of steam on synthetic fuel production from sawdust in new-designed dual-bed gasification was studied. The dual-bed gasification reactor composed of bubbling/fast fluidized bed combustor and fixed bed gasifier (pyrolysis included) was designed to produce syngas (CO + H2 + CO2 and CH4). The results showed that syngas produced by the dual-bed gasifier with higher steam/carbon ratio also had higher H2 content. In theory, the various reactions expected to occur in the gasification process were boudouard, water-gas and water-gas shift, methanation and steam reforming. Since the operating temperature was only 500-600°C that the steam reformation of methane was desperately to occur due to its endothermic, then CH4 formation still were found. Producer gas from the new gasifier had relatively high quality in terms of heating value per a unit volume compared to other conventional gasifiers. This can be used directly as good gaseous fuel. However, the product gas was not likely served as precursor in chemical industries due to its still low H2/CO ratio and high CH4 concentration.

scholarly journals A Comprehensive Literature Review of Thermochemical Conversion of Biomass for Syngas Production and Associated Challenge

2019 ◽  
Vol 38 (2) ◽  
pp. 495-512
Author(s):  
Ghulamullah Maitlo ◽  
Rasool Bux Mahar ◽  
Zulfiqar Ali Bhatti ◽  
Imran Nazir
Keyword(s):  
Fossil Fuels ◽  
Fixed Bed ◽  
Biomass Gasification ◽  
Gaseous Product ◽  
Gas Production ◽  
Thermochemical Conversion ◽  
Producer Gas ◽  
Syngas Production ◽  
Gasification Process

The interest in the thermochemical conversion of biomass for producer gas production since last decade has increased because of the growing attention to the application of sustainable energy resources. Application of biomass resources is a valid alternative to fossil fuels as it is a renewable energy source. The valuable gaseous product obtained through thermochemical conversion of organic material is syngas, whereas the solid product obtained is char. This review deals with the state of the art of biomass gasification technologies and the quality of syngas gathered through the application of different gasifiers along with the effect of different operating parameters on the quality of producer gas. Main steps in gasification process including drying, oxidation, pyrolysis and reduction effects on syngas production and quality are presented in this review. An overview of various types of gasifiers used in lignocellulosic biomass gasification processes, fixed bed and fluidized bed and entrained flow gasifiers are discussed. The effects of various process parameters such as particle size, steam and biomass ratio, equivalence ratio, effects of temperature, pressure and gasifying agents are discussed. Depending on the priorities of several researchers, the optimum value of different anticipated productivities in the gasification process comprising better quality syngas production improved lower heating value, higher syngas production, improved cold gas efficiency, carbon conversion efficiency, production of char and tar have been reviewed.

scholarly journals Modeling Performance of High-Temperature Biomass Gasification Process

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
C. F. Mhilu
Keyword(s):  
Simulation Code ◽  
Agricultural Residue ◽  
Syngas Production ◽  
Gasification Process ◽  
Product Gas ◽  
Chemical Exergy ◽  
Model Equations ◽  
Materials Used ◽  
Physical And Chemical ◽  
Thermodynamic Equilibrium Model

Biomass utilization is becoming a subject of increasing interest as an alternative to clean fuel. A novel gasification process using highly preheated air gasifier using agricultural residue such as sugar bagasse, rice husks, and palm stem widely available in Tanzania is presented. The study examines, irreversibilities making the gasifier the least efficient unit in the gasification process employing a thermodynamic equilibrium model allowing predicting the main product gas composition CO, CO2, H2, and CH4. The derived model equations are computed using the MAPLE process simulation code in MATLAB. The gasification regime is investigated at temperatures ranging from 800 K to 1400 K and at equivalence ratio (ER) values between 0.3 and 0.4. The results obtained conform to the second law efficiency based on chemical exergy yielding maximum values for the types of biomass materials used. These results indicate that the application of preheated air has an effect on the increase of the chemical exergy efficiency of the product gas, hence reducing the level of irreversibility. Similarly, these results show that the combined efficiency based on physical and chemical exergy is low, suggesting that higher irreversibilities are encountered, since the exergy present in the form of physical exergy is utilized to heat the reactants. Such exergy losses can be minimized by altering the ratio of physical and chemical exergy in the syngas production.

A techno-economic assessment of syngas production by plasma gasification of municipal solid waste as a substitute gaseous fuel

2020 ◽  
pp. 1-44
Author(s):  
Néstor D. Montiel-Bohórquez ◽  
Juan D. Saldarriaga-Loaiza ◽  
Juan F. Pérez
Keyword(s):  
Power Consumption ◽  
Plasma Temperature ◽  
Gaseous Fuel ◽  
Waste To Energy ◽  
Process Efficiency ◽  
Main Process ◽  
Plasma Gasification ◽  
Syngas Production ◽  
Gasification Process ◽  
Energy And Exergy

Abstract The updraft plasma gasification process of different municipal solid wastes (MSW) to produce syngas as substitute gaseous fuel was assessed from a techno-economic viewpoint. The plasma gasification process was modelled under a thermo-chemical approach using Aspen Plus. The model validation has been carried out with experimental data from literature, reaching an average relative error of 6.23%. The plasma torch power consumption was one of the main process parameters that affects the energy and exergy efficiencies. In spite of increasing moisture content of MSW, from 26.61% to 57.9%, the energy and exergy efficiencies expanded by 1.5% and 5.4% on average, respectively, which ascribed to the reduction of torch power consumption; this behavior resulted as the torches thermally degraded a lower fraction of dry MSW. Whereas, if plasma temperature increased (2500°C to 4000°C), the gasification efficiencies diminished because of the torch power consumption boosted by 28.3%. Furthermore, the parameter combinations process (air flow and plasma temperature) was found to reach the highest process efficiency, the efficiency ranged from 79.22% to 83.46%, highlighting the plasma gasification flexibility. The levelized cost of syngas production varied from 15.83 to 26.21 ¢US/kWh. Therefore, to make these projects feasible (waste to energy), a waste disposal charge that must be ranged between 14.67 and 26.82 ¢US/kWh was proposed.

Numerical Simulation of Thermal Plasma Gasification Process

2015 ◽  
Vol 799-800 ◽  
pp. 90-94 ◽  
Author(s):  
Sooseok Choi
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Thermal Plasma ◽  
Plasma Reactor ◽  
Plasma Gasification ◽  
Arc Voltage ◽  
Syngas Production ◽  
Gasification Process ◽  
Computational Fluid Dynamics Cfd ◽  
Reactor Temperature

Numerical analysis of plasma gasification process was carried out base on the combination of magnetohydrodynamics (MHD) and computational fluid dynamics (CFD). A two stage gasification system which consists of a heater and a plasma rector was used to enhance syngas production in the present work. Nitrogen thermal plasma jet generated by a low power plasma torch was analyzed by a self-developed MHD code, and complex thermal flow field in the plasma reactor was simulated with a commercial CFD code. The accuracy of numerical simulation was confirmed from the comparison between numerical results and experimentally measured data of arc voltage and reactor temperature. From the numerical analysis, a high temperature for the thermal cracking of methane was expected in the upper region of the plasma reactor.

Derivation of Entropy and Exergy Transport Equations, and Application to Second Law Analysis of Sugarcane Bagasse Gasification in Bubbling Fluidized Beds

2019 ◽  
Vol 142 (6) ◽  
Author(s):  
Gabriel L. Verissimo ◽  
Manuel E. Cruz ◽  
Albino J. K. Leiroz
Keyword(s):  
Sugarcane Bagasse ◽  
Fluidized Beds ◽  
Chemical Species ◽  
Second Law Of Thermodynamics ◽  
Transport Equations ◽  
Second Law ◽  
Exergy Destruction ◽  
Gasification Process ◽  
Second Law Analysis ◽  
Biomass Particles

Abstract In the present work, the transport equations for mass, momentum, energy, and chemical species as given by the Euler–Euler formulation for multiphase flows are used together with the second law of thermodynamics to derive the entropy and exergy transport equations, suitable to the study of gas-particle reactive flows, such as those observed during pyrolysis, gasification, and combustion of biomass particles. The terms of the derived equations are discussed, and the exergy destruction contributions are identified. Subsequently, a kinetic model is implemented in a computational fluid dynamics (CFD) open source code for the sugarcane bagasse gasification. Then, the derived exergy destruction terms are implemented numerically through user-defined Fortran routines. Next, the second law analysis of the gasification process of sugarcane bagasse in bubbling fluidized beds is carried out. Detailed results are obtained for the local destructions of exergy along the reactor. This information is important to help improve environmental and sustainable practices and should be of interest to both designers and operators of fluidized bed equipment.

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