scholarly journals Progress in Thermodynamic Simulation and System Optimization of Thermochemical Conversion Process of Biomass

2021 ◽  
Author(s):  
Yang Zhang ◽  
Yuanhui Ji ◽  
Hongliang Qian
Keyword(s):  
Thermodynamic Simulation ◽  
System Optimization ◽  
Conversion Process ◽  
Thermochemical Conversion

Mathematical Modeling of a Biomass Steam Gasifier—A Modified Equilibrium Approach

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Thomas Gröbl ◽  
Heimo Walter
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Models ◽  
Present Article ◽  
Equilibrium Model ◽  
Conversion Process ◽  
Thermochemical Conversion ◽  
Equilibrium Models ◽  
Gasification Process ◽  
Equilibrium Approach ◽  
Made In

A large potential is contributed to the energetic utilization of biomass, whereby thermochemical gasification seems to be especially interesting. In order to contribute to a better understanding of the thermochemical conversion process in the gasifier, mathematical models are used. An intensive effort is made in development of mathematical models describing the gasification process and a large number of models, considerably differing in their degree of simplification, and their applications are reported in literature. In the present article, a brief review of models applied, mainly focused on equilibrium models, is provided and a robust and flexible modified stoichiometric equilibrium model, for modeling a novel gasifier, is presented.

Palm Bio-Oil Upgrading Research-Towards Effective Utilization of Waste

2014 ◽  
Vol 625 ◽  
pp. 800-804
Author(s):  
Noor Azean Mat Salleh ◽  
Bawadi Abdullah ◽  
Ruzaimah Nik Mohamad Kamil
Keyword(s):  
Alternative Energy ◽  
Conversion Process ◽  
Thermochemical Conversion ◽  
Chemical Extraction ◽  
Pyrolysis Oil ◽  
Effective Utilization ◽  
Net Zero ◽  
Bio Oil ◽  
Zero Carbon ◽  
Current Utilization

Biomass utilization has arouse great attention and interest in recent years as it offers a net zero carbon footprint and security of the feedstocks. Current utilization process of biomass can be classified into biochemical and thermochemical conversion process. Pyrolysis process seems to be the promising conversion process in securing chemical feedstock as pyrolysis oil can be futher upgraded for chemical extraction. This paper reviews the most abundance biomass in Malaysia which is palm waste and discusses the its utilization by prolysis process. Upgrading research of pyrolysis oil also been discussed as to promotes the effective utilization of waste and securing alternative energy source.

OPERATING TEMPERATURE AND RETENTION TIME EFFECTS ON THE THERMOCHEMICAL CONVERSION PROCESS OF SWINE MANURE

2000 ◽  
Vol 43 (6) ◽  
pp. 1821-1825 ◽  
Author(s):  
B. J. He ◽  
Y. Zhang ◽  
Y. Yin ◽  
T. L. Funk ◽  
G. L. Riskowski
Keyword(s):  
Retention Time ◽  
Operating Temperature ◽  
Swine Manure ◽  
Conversion Process ◽  
Thermochemical Conversion ◽  
Time Effects

Valorization of Jatropha seed to fuel and chemical feedstock using a thermochemical conversion process

Biofuels ◽  
2016 ◽  
Vol 7 (5) ◽  
pp. 429-435 ◽  
Author(s):  
Siba Sankar Sethi ◽  
Sachin Kumar ◽  
Achyut K. Panda ◽  
R.K. Singh
Keyword(s):  
Conversion Process ◽  
Thermochemical Conversion ◽  
Jatropha Seed ◽  
Chemical Feedstock

Continuous Thermochemical Conversion Process to Produce Oil from Swine Manure

2003 ◽  
Author(s):  
Kim Carlo S. Ocfemia ◽  
Yuanhui Zhang ◽  
Ted Funk
Keyword(s):  
Swine Manure ◽  
Conversion Process ◽  
Thermochemical Conversion

scholarly journals On the mathematical model simplification using constant Lewis number – Impact assessment on heterogeneous char conversion process

2021 ◽  
Vol 321 ◽  
pp. 02015
Author(s):  
Mohammed Asheruddin N ◽  
Anand M Shivapuji ◽  
Dasappa Srinivasaiah
Keyword(s):  
Reactive Systems ◽  
Lewis Number ◽  
Mass Conservation ◽  
Conversion Process ◽  
Thermochemical Conversion ◽  
Enskog Equation ◽  
Product Gas ◽  
Conversion Time ◽  
Computationally Intensive ◽  
Char Conversion

Reactive systems in a thermochemical conversion domain are modelled considering N-specie, 1-energy and 2-mass conservation equations assuming negligible pressure gradient resulting in N+3 non-linear coupled PDE system with dependency on thermodynamic and transport properties. Typically, simplistic temperature-dependent polynomials are chosen for estimating thermal conductivity and specific heat, however, the estimation of mass diffusion coefficient (Di;mix) follows a complicated procedure involving kinetic theory culminating in Chapman-Enskog equation. This renders the solution computationally intensive. The complexity is simplified by assuming a constant Lewis (Le) number, a standard practice in the analytical solution for conventional reactive systems. In fixing Le, (Di;mix) is equated to thermal diffusivity (a ratio of thermodynamic properties) resulting in the specie and energy equation yielding a similar solution and collapse of N+3 system of simultaneous equations to 3 equations. The current article explores the validity and limitation of assuming constant Le in the simulation of char conversion process in air and steam. Results of char conversion are compared for fixed Le and D estimated with Chapman{Enskog expresion. The analysis suggests that Le remains invariant only under a severely restricted set of conditions. Fixing Le influences, the conversion process either over-/under-predicting the conversion time scales and the product gas composition.

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