Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste

In this study, a new pretreatment for using wet food biomass waste as a high calorific and reactive feedstock for gasification is presented. The method involves the addition of calcium hydroxide, hot water treatment, and dewatering in vegetable oil. Hot water treatment at 230°C reduced the oxygen/ca...

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Autores principales:	Hasegawa Isao, Tsujiuchi Tatsuya, Mae Kazuhiro
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	wet biomass waste gasification calcium hydroxide hydrothermal treatment dewatering in oil Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/d58873f78b404afa80162035e0f9717f
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spelling	oai:doaj.org-article:d58873f78b404afa80162035e0f9717f2021-12-05T14:10:49ZThree combined pretreatments for reactive gasification feedstock from wet coffee grounds waste2191-955010.1515/gps-2021-0016https://doaj.org/article/d58873f78b404afa80162035e0f9717f2021-03-01T00:00:00Zhttps://doi.org/10.1515/gps-2021-0016https://doaj.org/toc/2191-9550In this study, a new pretreatment for using wet food biomass waste as a high calorific and reactive feedstock for gasification is presented. The method involves the addition of calcium hydroxide, hot water treatment, and dewatering in vegetable oil. Hot water treatment at 230°C reduced the oxygen/carbon atomic ratio of coffee grounds waste to improve the calorific value, but this treatment also formed an inactive cross-linked structure caused by dehydration reactions. By mixing the coffee grounds waste with calcium hydroxide powder before the hot water treatment, cross-linking was suppressed and the gasification rate of the char significantly increased because of the catalytic effect. With or without hot water treatment, the time required to complete gasification for the chars of the grounds mixed with calcium hydroxide was reduced to about one-third of that for the char of the untreated grounds. After heating in vegetable oil at 150°C, moisture was completely removed from the coffee grounds and they became impregnated with a large amount of the oil. As dewatering in oil did not affect the gasification rate of the chars, a combination of these three treatments was found to efficiently convert wet food biomass waste into a gasification feedstock.Hasegawa IsaoTsujiuchi TatsuyaMae KazuhiroDe Gruyterarticlewet biomass wastegasificationcalcium hydroxidehydrothermal treatmentdewatering in oilChemistryQD1-999ENGreen Processing and Synthesis, Vol 10, Iss 1, Pp 169-177 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	wet biomass waste gasification calcium hydroxide hydrothermal treatment dewatering in oil Chemistry QD1-999
spellingShingle	wet biomass waste gasification calcium hydroxide hydrothermal treatment dewatering in oil Chemistry QD1-999 Hasegawa Isao Tsujiuchi Tatsuya Mae Kazuhiro Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste
description	In this study, a new pretreatment for using wet food biomass waste as a high calorific and reactive feedstock for gasification is presented. The method involves the addition of calcium hydroxide, hot water treatment, and dewatering in vegetable oil. Hot water treatment at 230°C reduced the oxygen/carbon atomic ratio of coffee grounds waste to improve the calorific value, but this treatment also formed an inactive cross-linked structure caused by dehydration reactions. By mixing the coffee grounds waste with calcium hydroxide powder before the hot water treatment, cross-linking was suppressed and the gasification rate of the char significantly increased because of the catalytic effect. With or without hot water treatment, the time required to complete gasification for the chars of the grounds mixed with calcium hydroxide was reduced to about one-third of that for the char of the untreated grounds. After heating in vegetable oil at 150°C, moisture was completely removed from the coffee grounds and they became impregnated with a large amount of the oil. As dewatering in oil did not affect the gasification rate of the chars, a combination of these three treatments was found to efficiently convert wet food biomass waste into a gasification feedstock.
format	article
author	Hasegawa Isao Tsujiuchi Tatsuya Mae Kazuhiro
author_facet	Hasegawa Isao Tsujiuchi Tatsuya Mae Kazuhiro
author_sort	Hasegawa Isao
title	Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste
title_short	Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste
title_full	Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste
title_fullStr	Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste
title_full_unstemmed	Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste
title_sort	three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/d58873f78b404afa80162035e0f9717f
work_keys_str_mv	AT hasegawaisao threecombinedpretreatmentsforreactivegasificationfeedstockfromwetcoffeegroundswaste AT tsujiuchitatsuya threecombinedpretreatmentsforreactivegasificationfeedstockfromwetcoffeegroundswaste AT maekazuhiro threecombinedpretreatmentsforreactivegasificationfeedstockfromwetcoffeegroundswaste
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Three combined pretreatments for reactive gasification feedstock from wet coffee grounds waste

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