Control Strategy Scheme for the Prehydrolysis Kraft Process

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Control Strategy Scheme for the Prehydrolysis Kraft Process. / Lahnalammi, Antton; Sixta, Herbert; Jämsä-Jounela, Sirkka-Liisa.

julkaisussa: Computer Aided Chemical Engineering, Vuosikerta 44, Nro Part A, 102, 2018, s. 643 - 648.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Bibtex - Lataa

@article{e454a2eaf60f4a5c97b8795f4c11e654,
title = "Control Strategy Scheme for the Prehydrolysis Kraft Process",
abstract = "This paper presents a control strategy scheme for the prehydrolysis stage in the prehydrolysis kraft process. The key element of the proposed control strategy is a softsensor, which estimates the rate of the unobservable reactions based on a physicochemical dynamic model of the process. The rate of hydrolysis depends on the wood temperature and hydrogen ion concentration, which can be calculated by estimating the reaction heat due to deacetylation of wood and subsequent wood component degradation reactions. The estimated hydrogen ion concentration and reaction enthalpies are combined with dynamic temperature profile and kinetic reaction models for estimation of the main quality parameters for dissolving pulp, namely the lignin content and the content and degree of polymerization of the alpha-cellulose fraction. The developed model is tested based on parameters approximated from the literature and the feasibility of the model for testing the suggested control strategy scheme is discussed.",
keywords = "prehydrolysis kraft process, dissolving pulp, dynamic model, soft-sensor, model-based control",
author = "Antton Lahnalammi and Herbert Sixta and Sirkka-Liisa J{\"a}ms{\"a}-Jounela",
note = "Hyv{\"a}ksytty k{\"a}ss{\"a}ri pysyy klosattuna kunnes Else vastaa saako proceedingsin FAMin avata kuten lehtien. Elsen embargo-listalla julkaisua ei ole. ISBN-nimell{\"a} oleva on koko julkaisu. Ei saa avata miss{\"a}{\"a}n tapuksessa -> kust. copy rightit! Sherpa/Romea = ei saa avata. Else ei ole vasannut mit{\"a}{\"a}n lukuisista pyynn{\"o}ist{\"a} huolimatta. (21.8.18)",
year = "2018",
doi = "10.1016/B978-0-444-64241-7.50102-6",
language = "English",
volume = "44",
pages = "643 -- 648",
journal = "Computer Aided Chemical Engineering",
issn = "1570-7946",
publisher = "Elsevier",
number = "Part A",

}

RIS - Lataa

TY - JOUR

T1 - Control Strategy Scheme for the Prehydrolysis Kraft Process

AU - Lahnalammi, Antton

AU - Sixta, Herbert

AU - Jämsä-Jounela, Sirkka-Liisa

N1 - Hyväksytty kässäri pysyy klosattuna kunnes Else vastaa saako proceedingsin FAMin avata kuten lehtien. Elsen embargo-listalla julkaisua ei ole. ISBN-nimellä oleva on koko julkaisu. Ei saa avata missään tapuksessa -> kust. copy rightit! Sherpa/Romea = ei saa avata. Else ei ole vasannut mitään lukuisista pyynnöistä huolimatta. (21.8.18)

PY - 2018

Y1 - 2018

N2 - This paper presents a control strategy scheme for the prehydrolysis stage in the prehydrolysis kraft process. The key element of the proposed control strategy is a softsensor, which estimates the rate of the unobservable reactions based on a physicochemical dynamic model of the process. The rate of hydrolysis depends on the wood temperature and hydrogen ion concentration, which can be calculated by estimating the reaction heat due to deacetylation of wood and subsequent wood component degradation reactions. The estimated hydrogen ion concentration and reaction enthalpies are combined with dynamic temperature profile and kinetic reaction models for estimation of the main quality parameters for dissolving pulp, namely the lignin content and the content and degree of polymerization of the alpha-cellulose fraction. The developed model is tested based on parameters approximated from the literature and the feasibility of the model for testing the suggested control strategy scheme is discussed.

AB - This paper presents a control strategy scheme for the prehydrolysis stage in the prehydrolysis kraft process. The key element of the proposed control strategy is a softsensor, which estimates the rate of the unobservable reactions based on a physicochemical dynamic model of the process. The rate of hydrolysis depends on the wood temperature and hydrogen ion concentration, which can be calculated by estimating the reaction heat due to deacetylation of wood and subsequent wood component degradation reactions. The estimated hydrogen ion concentration and reaction enthalpies are combined with dynamic temperature profile and kinetic reaction models for estimation of the main quality parameters for dissolving pulp, namely the lignin content and the content and degree of polymerization of the alpha-cellulose fraction. The developed model is tested based on parameters approximated from the literature and the feasibility of the model for testing the suggested control strategy scheme is discussed.

KW - prehydrolysis kraft process

KW - dissolving pulp

KW - dynamic model

KW - soft-sensor

KW - model-based control

U2 - 10.1016/B978-0-444-64241-7.50102-6

DO - 10.1016/B978-0-444-64241-7.50102-6

M3 - Conference article

VL - 44

SP - 643

EP - 648

JO - Computer Aided Chemical Engineering

JF - Computer Aided Chemical Engineering

SN - 1570-7946

IS - Part A

M1 - 102

ER -

ID: 26773690