scholarly journals Thermodynamic Equilibrium Analysis of Product Distribution in the Fischer–Tropsch Process Under Different Operating Conditions

ACS Omega ◽  
2019 ◽  
Vol 4 (26) ◽  
pp. 22237-22244 ◽  
Author(s):  
Junjie Chen ◽  
Cheng Yang
Keyword(s):  
Thermodynamic Equilibrium ◽  
Product Distribution ◽  
Operating Conditions ◽  
Equilibrium Analysis ◽  
Fischer Tropsch

Modelling of Fischer-Tropsch Synthesis in a Fluidized Bed Reactor

2012 ◽  
Vol 586 ◽  
pp. 274-281
Author(s):  
Mohammad Kazemeini ◽  
Reza Maleki ◽  
Moslem Fattahi
Keyword(s):  
Experimental Data ◽  
Kinetic Model ◽  
Natural Gas ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Product Distribution ◽  
Operating Conditions ◽  
Distribution Model ◽  
Fischer Tropsch ◽  
Respective Rate

The FT reaction involves the conversion of syngas which is derived from natural gas or coal to different kinds of products according to the operating conditions and the type of the catalyst. In other words, it is a practical way to convert solid fuel (coal) and natural gas to various hydrocarbons (C1-C60) and oxygenates such as alkanes, alkenes etc. The main products of the reaction are naphtha and gasoline. This paper deals with developing a proper product distribution model for FT process using the appropriate kinetic model, optimizing the respective rate constants while applying them in product distribution equations. The results revealed only 8.09% deviations from the olefin experimental data and 10.27% deviations from the paraffin experimental data being acceptable when compared with previous open literature data.

Prediction of Fischer–Tropsch Synthesis Kinetic Parameters Using Neural Networks

2014 ◽  
Vol 9 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Fabiano A. N. Fernandes ◽  
Francisco E. Linhares-Junior ◽  
Samuel J. M. Cartaxo
Keyword(s):  
Neural Networks ◽  
Kinetic Parameters ◽  
Kinetic Mechanism ◽  
Product Distribution ◽  
Operating Conditions ◽  
Tropsch Synthesis ◽  
Polymerization Reaction ◽  
Fischer Tropsch ◽  
Specific Product ◽  
Fischer Tropsch Synthesis

Abstract The kinetic mechanism of the Fischer–Tropsch synthesis (FTS) is complex resembling a polymerization reaction. The kinetic rate constants for initiation, propagation and termination steps and the constants for the equilibrium reactions for methylene formation (in situ monomer) need to be estimated. A mathematical model for the FTS allows for simulating several operating conditions and determining the best operating conditions to produce a specific product distribution, so the kinetic parameters must be statistically valid. This work used neural networks (NNs) to estimate the FTS kinetic parameters, instead of using methods based on least squared error. The results show that NNs with three hidden layers were able to output good estimates of the kinetic parameters with less than 5% of deviation.

scholarly journals Progress in Reactors for High-Temperature Fischer–Tropsch Process: Determination Place of Intensifier Reactor Perspective

2014 ◽  
Vol 12 (1) ◽  
pp. 639-664 ◽  
Author(s):  
Samrand Saeidi ◽  
Masoud Talebi Amiri ◽  
Nor Aishah Saidina Amin ◽  
Mohammad Reza Rahimpour
Keyword(s):  
High Temperature ◽  
Process Parameters ◽  
Membrane Reactor ◽  
Product Distribution ◽  
Production Yield ◽  
Fischer Tropsch ◽  
By Products

Abstract High-temperature Fischer–Tropsch (HTFT) process aims to produce lighter cuts such as gasoline and diesel. For many years there have been studies and improvements on HTFT process to make the existing reactors more efficient. Recent studies proposed new configurations such as dual-type membrane reactor and coupling configurations reactor, which improved the performances of this process. This achievement persuades us to update the existing knowledge about the available reactors for HTFT process. In this article, features and performances overview of two classes of reactors are reviewed. The first class consists of the reactors which are based on older studies, and the second one includes recent studies which are called product intensifier reactors. Finally, it is shown that the product intensifier reactors have higher CO conversions and lower selectivity of undesired by-products which results in higher production yield of gasoline. Furthermore, the place of product intensifier reactor among common reactors with regard to the influence of the process parameters on the product distribution has been estimated.

scholarly journals Emissions and In-Cylinder Combustion Characteristics of Fischer-Tropsch and Conventional Diesel Fuels in a Modern CI Engine

2005 ◽  
Author(s):  
Alexander G. Sappok ◽  
Jeremy T. Llaniguez ◽  
Joseph Acar ◽  
Victor W. Wong
Keyword(s):  
Combustion Characteristics ◽  
Operating Conditions ◽  
Fuel Properties ◽  
Emissions Reduction ◽  
Cylinder Pressure ◽  
Fischer Tropsch ◽  
Diesel Fuels ◽  
Ultra Low Sulfur Diesel ◽  
Low Sulfur ◽  
Detailed Chemical

Derived from natural gas, coal, and even biomass Fischer-Tropsch (F-T) diesel fuels have a number of very desirable properties. The potential for emissions reduction with F-T diesel fuels in laboratory engine tests and on-road vehicle tests is well documented. While a number of chemical and physical characteristics of F-T fuels have been attributed to the observed reduction in emissions, the actual effects of both the fuel properties and in-cylinder combustion characteristics in modern diesel engines are still not well understood. In this study a 2002, six-cylinder, 5.9 liter, Cummins ISB 300 diesel engine, outfitted with an in-cylinder pressure transducer. was subjected to a subset of the Euro III 13-mode test cycle under steady-state operating conditions. Emissions and in-cylinder pressure measurements were conducted for neat F-T diesel, low sulfur diesel (LSD), ultra-low sulfur diesel (ULSD), and a blend of FT/LSD. In addition, a detailed chemical analysis of the fuels was carried out. The differences in the measured combustion characteristics and fuel properties were compared to the emissions variations between the fuels studied, and an explanation for the observed emissions behavior of the fuels was developed.

Effect of CO Conversion on the Product Distribution of a Co/Al2O3 Fischer–Tropsch Synthesis Catalyst Using a Fixed Bed Reactor

2012 ◽  
Vol 142 (11) ◽  
pp. 1382-1387 ◽  
Author(s):  
Dragomir B. Bukur ◽  
Zhendong Pan ◽  
Wenping Ma ◽  
Gary Jacobs ◽  
Burtron H. Davis
Keyword(s):  
Fixed Bed ◽  
Product Distribution ◽  
Tropsch Synthesis ◽  
Fixed Bed Reactor ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Co Conversion

scholarly journals An Experimental and Thermodynamic Equilibrium Analysis on the Leaching Process of Arsenic (As) from Coal Fly Ash

2021 ◽  
Vol 100 (8) ◽  
pp. 102-109
Author(s):  
Ulung Muhammad SUTOPO ◽  
Erda Rahmilaila DESFITRI ◽  
Farrah Fadhillah HANUM ◽  
Yukio HAYAKAWA ◽  
Shinji KAMBARA
Keyword(s):  
Fly Ash ◽  
Thermodynamic Equilibrium ◽  
Coal Fly Ash ◽  
Equilibrium Analysis ◽  
Leaching Process
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