Evaluating the Rate Equation of Delignification Reaction of Populus deltoides

Because of importance and wide usage of different species of Populus wood in paper pulping, the delignification reaction in pulping process of P. deltoides was investigated in order to obtain the relation between residual lignin in the pulp and cooking time. The samples were 10 years olded of Populu...

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Autores principales:	Mohammad Mahdi Barazandeh, Saeid Mahdavi, Abbas Fakhryan
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2017
Materias:	POPULUS DELTOIDES paper pulp delignification reaction rate Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/c88793c59c474b87a752acfbe0f0c898
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spelling	oai:doaj.org-article:c88793c59c474b87a752acfbe0f0c8982021-12-02T05:06:03ZEvaluating the Rate Equation of Delignification Reaction of Populus deltoides1735-09132383-112X10.22092/ijwpr.2017.107119https://doaj.org/article/c88793c59c474b87a752acfbe0f0c8982017-04-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_107119_9263ce63bffb1fccac8735792d4d6244.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XBecause of importance and wide usage of different species of Populus wood in paper pulping, the delignification reaction in pulping process of P. deltoides was investigated in order to obtain the relation between residual lignin in the pulp and cooking time. The samples were 10 years olded of Populus deltoids woods which were collected from Chamestan Research Station located in Noor‌‌ city of Mazandaran province. Kraft method was used for pulping the condition of which were 25% sulfidity, 14% alkali, 5:1 the ratio of liquor to sample, maximum cooking temperature as 155, 165, 175 degree centigrade. Kappa number and the yields of pulps were estimated and residual lignin was calculated for each sample. Using the models predicted for rate equation and trial and error method in excell software, the order and rate constant of delignification reaction were evaluated for each cooking temperature. The results show that the rate equations of delignification reaction of Populus deltoides in temperatures of 155°C, 165°C and 175°C have the orders of 5.5, 2.5 , 1 and the rate constants of 1.8× 10-7 min.-1 conc.-4.5, 7.7× 10-4 min.-1 conc.-1.5 and 3.5× 10-3 min.-1 , respectively. Using these equations it will be possible to control the pulping process and predict the time required to obtain a desired lignin concentration in the pulp.Mohammad Mahdi BarazandehSaeid MahdaviAbbas FakhryanRegional Information Center for Science and Technology (RICeST)articlePOPULUS DELTOIDESpaper pulpdelignificationreaction rateForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 32, Iss 1, Pp 25-32 (2017)
institution	DOAJ
collection	DOAJ
language	FA
topic	POPULUS DELTOIDES paper pulp delignification reaction rate Forestry SD1-669.5
spellingShingle	POPULUS DELTOIDES paper pulp delignification reaction rate Forestry SD1-669.5 Mohammad Mahdi Barazandeh Saeid Mahdavi Abbas Fakhryan Evaluating the Rate Equation of Delignification Reaction of Populus deltoides
description	Because of importance and wide usage of different species of Populus wood in paper pulping, the delignification reaction in pulping process of P. deltoides was investigated in order to obtain the relation between residual lignin in the pulp and cooking time. The samples were 10 years olded of Populus deltoids woods which were collected from Chamestan Research Station located in Noor‌‌ city of Mazandaran province. Kraft method was used for pulping the condition of which were 25% sulfidity, 14% alkali, 5:1 the ratio of liquor to sample, maximum cooking temperature as 155, 165, 175 degree centigrade. Kappa number and the yields of pulps were estimated and residual lignin was calculated for each sample. Using the models predicted for rate equation and trial and error method in excell software, the order and rate constant of delignification reaction were evaluated for each cooking temperature. The results show that the rate equations of delignification reaction of Populus deltoides in temperatures of 155°C, 165°C and 175°C have the orders of 5.5, 2.5 , 1 and the rate constants of 1.8× 10-7 min.-1 conc.-4.5, 7.7× 10-4 min.-1 conc.-1.5 and 3.5× 10-3 min.-1 , respectively. Using these equations it will be possible to control the pulping process and predict the time required to obtain a desired lignin concentration in the pulp.
format	article
author	Mohammad Mahdi Barazandeh Saeid Mahdavi Abbas Fakhryan
author_facet	Mohammad Mahdi Barazandeh Saeid Mahdavi Abbas Fakhryan
author_sort	Mohammad Mahdi Barazandeh
title	Evaluating the Rate Equation of Delignification Reaction of Populus deltoides
title_short	Evaluating the Rate Equation of Delignification Reaction of Populus deltoides
title_full	Evaluating the Rate Equation of Delignification Reaction of Populus deltoides
title_fullStr	Evaluating the Rate Equation of Delignification Reaction of Populus deltoides
title_full_unstemmed	Evaluating the Rate Equation of Delignification Reaction of Populus deltoides
title_sort	evaluating the rate equation of delignification reaction of populus deltoides
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2017
url	https://doaj.org/article/c88793c59c474b87a752acfbe0f0c898
work_keys_str_mv	AT mohammadmahdibarazandeh evaluatingtherateequationofdelignificationreactionofpopulusdeltoides AT saeidmahdavi evaluatingtherateequationofdelignificationreactionofpopulusdeltoides AT abbasfakhryan evaluatingtherateequationofdelignificationreactionofpopulusdeltoides
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Evaluating the Rate Equation of Delignification Reaction of Populus deltoides

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