Influence of Black Liquor Variability, Combustion, and Gasification Process Variables and Inaccuracies in Thermochemical Data on Equilibrium Modeling Results

2006 ◽  
Vol 20 (1) ◽  
pp. 359-363 ◽  
Author(s):  
Anders Larsson ◽  
Anders Nordin ◽  
Rainer Backman ◽  
Björn Warnqvist ◽  
Gunnar Eriksson
Keyword(s):  
Black Liquor ◽  
Thermochemical Data ◽  
Process Variables ◽  
Equilibrium Modeling ◽  
Gasification Process

Effect of process variables on the performance of electrochemical acidification of Kraft black liquor by electrodialysis with bipolar membrane

2016 ◽  
Vol 304 ◽  
pp. 977-985 ◽  
Author(s):  
Maryam Haddad ◽  
Raynald Labrecque ◽  
Laurent Bazinet ◽  
Oumarou Savadogo ◽  
Jean Paris
Keyword(s):  
Black Liquor ◽  
Process Variables ◽  
Bipolar Membrane ◽  
Kraft Black Liquor

Understanding the Effect of Precipitation Process Variables on Hardwood Lignin Characteristics and Recovery from Black Liquor

2020 ◽  
Vol 8 (37) ◽  
pp. 13997-14005
Author(s):  
Raisa Carmen Andeme Ela ◽  
Lauren Spahn ◽  
Niloofar Safaie ◽  
Robert Charles Ferrier ◽  
Rebecca G. Ong
Keyword(s):  
Black Liquor ◽  
Precipitation Process ◽  
Process Variables ◽  
Lignin Characteristics

Sodium and Sulfur Process Chemistry in Black Liquor Gasification and Combustion: Review and Reevaluation of Basic Thermochemical Data

ChemInform ◽  
2005 ◽  
Vol 36 (35) ◽  
Author(s):  
Anders Larsson ◽  
Gustav Lindberg ◽  
Mathias Raberg ◽  
Anders Nordin ◽  
Dan Bostroem ◽  
...  
Keyword(s):  
Black Liquor ◽  
Thermochemical Data ◽  
Process Chemistry

Effects of titanium dioxide as direct causticization agent on the pyrolysis and steam gasification characteristics of straw black liquor solid

TAPPI Journal ◽  
2015 ◽  
Vol 14 (6) ◽  
pp. 361-369 ◽  
Author(s):  
GUIJIN WANG ◽  
HONGYOU YUAN ◽  
DALIANG GUO ◽  
ZHAOQIU ZHOU ◽  
XIULI YIN ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Titanium Dioxide ◽  
Black Liquor ◽  
Melting Process ◽  
Steam Gasification ◽  
Product Analysis ◽  
Gasification Process ◽  
Gasification Rate ◽  
Study Laboratory

Black liquor gasification process with direct causticization using titanium dioxide (TiO2) is considered a promising technology for black liquor recovery in the future. In this study, laboratory-scale pyrolysis and steam gasification experiments with direct causticization using TiO2 for straw black liquor solid were performed in a thermogravimetric analyzer and a tube furnace, respectively. Effects of TiO2 on the pyrolysis and steam gasification characteristics are discussed on the basis of product analysis. The results show that after adding TiO2 at temperature higher than 550°C, the direct causticization reactions happened, while the thermogravimetric behavior of the black liquor solid along with releasing pattern of carbon dioxide and carbon monoxide was changed. In the presence of TiO2, swelling and agglomeration were prevented during the pyrolysis process. Meanwhile, sodium emission was significantly decreased and the steam gasification rate of the black liquor char at 850°C was substantially improved. The melting process during gasification was suppressed with direct causticization. Moreover, the yield of hydrogen was kept constant while the yields of carbon dioxide and carbon monoxide were increased during the steam gasification process with direct causticization.

scholarly journals APPROACHES TO THE GAS CONTROL IN UCG

2017 ◽  
Vol 57 (3) ◽  
pp. 182-200 ◽  
Author(s):  
Ján Kačur ◽  
Karol Kostúr
Keyword(s):  
Energy Source ◽  
Coal Mining ◽  
Coal Gasification ◽  
Air Flow ◽  
Ex Situ ◽  
Underground Coal Gasification ◽  
Process Variables ◽  
Oxidizing Agents ◽  
Gasification Process ◽  
Discrete Controller

Underground Coal Gasification represents an alternative for conventional coal mining. This technology is also less expensive than traditional mining. It is expected that coal will be an important energy source in the coming decades. In requirement to improve the gasification process we must ensure that the combustion reactions generated enough energy to heat the reactants. This can be achieved by controlling the flow of oxidizing agents and the underpressure control at the exit of the reactor UCG. This paper aims to propose the stabilization of air flow as a main gasification agent injected to the gasifier, underground temperature and concentration of O2 in syngas. Also there is proposed the mechanism that could cope with uncertainties in the process of UCG and its control on stabilization level. Paper presents utilization of discrete controller with adaptation in order to stabilization of UCG process variables. The controllers were verified on experimental ex-situ reactor (generator).

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