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[{"key": "dc.contributor.advisor", "value": "Louhelainen, Jarmo", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Lehto, Joni", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Haapala, Tero", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2022-06-22T05:38:23Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2022-06-22T05:38:23Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2022", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/81940", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4m\u00e4n tutkielman kirjallisuuskatsauksessa tarkasteltiin erilaisia rikkivapaita biomassan jalostusmenetelmi\u00e4. Aluksi perehdyttiin erilaisiin happamiin, alkalisiin, hydrotermisiin, oksidatiivisiin ja organosolv -esik\u00e4sittelymenetelmiin, joiden lis\u00e4ksi tutustuttiin ioninesteisiin sek\u00e4 syv\u00e4eutektisiin liuottimiin. My\u00f6hemmin tarkasteltiin erilaisia alkalisia ja organosolv -kuidutusprosesseja. Tutkielman kokeellisessa osuudessa analysoitiin vaahteran erilaisissa olosuhteissa toteutettujen alkali\u2013vetyperoksidiesik\u00e4sittelyjen (AHP-esik.) hydrolysaattien ja lis\u00e4ksi niiden j\u00e4lkeisten soodakeittojen mustalipeiden kemialliset koostumukset (ligniinipitoisuus, ligniinien painokeskim\u00e4\u00e4r\u00e4inen moolimassa sek\u00e4 haihtuvien happojen ja hydroksihappojen pitoisuus). Vaahteran AHP-esik\u00e4sittelyt oli toteutettu joko 2,5 %:n tai 5,0 %:n H2O2-m\u00e4\u00e4r\u00e4ll\u00e4, 4 %:n, 6 %:n tai 8 %:n NaOH annoksella, 50 \u2103:n tai 80 \u2103:n l\u00e4mp\u00f6tilassa ja 60:n tai 120 minuutin k\u00e4sittelyajalla. Referenssiesik\u00e4sittelyt oli toteutettu ilman H2O2:a. Soodakeitot oli toteutettu 20 %:n NaOH annoksella ja 170 \u2103:n l\u00e4mp\u00f6tilassa, keittoajan ollessa 100 minuuttia. Erilaisten AHP-esik\u00e4sittelyjen havaittiin vaikuttavan vaihtelevin tavoin ja merkityksin hydrolysaattien kemialliseen koostumukseen, jonka havaittiin yleisesti koostuvan p\u00e4\u00e4osin hapoista, ligniinipitoisuuden j\u00e4\u00e4dess\u00e4 verrattain v\u00e4h\u00e4iseksi. Ankarampien AHP-esik\u00e4sittelyolosuhteiden huomattiin l\u00e4hes poikkeuksetta kasvattavan sek\u00e4 ligniinipitoisuutta ett\u00e4 happojen m\u00e4\u00e4r\u00e4\u00e4 hydrolysaatissa. Muurahaishappopitoisuutta ja ligniinin painokeskim\u00e4\u00e4r\u00e4ist\u00e4 moolimassaa lukuunottamatta, merkitt\u00e4vi\u00e4 eroja eri AHP- ja referenssiesik\u00e4sittelyjen v\u00e4lill\u00e4 ei kuitenkaan havaittu. Mustalipe\u00e4n kemiallisen koostumuksen havaittiin yleisesti ottaen riippuvan merkitt\u00e4v\u00e4sti soodakeittoa edelt\u00e4v\u00e4st\u00e4 esik\u00e4sittelyst\u00e4. Referenssiesik\u00e4sittelyihin verrattuna, haihtuvien happojen pitoisuus ja ligniinin painokeskim\u00e4\u00e4r\u00e4inen moolimassa poislukien, soodakeittoa edelt\u00e4vien AHP-esik\u00e4sittelyjen huomattiin vaikuttavan vaihtelevasti mustalipe\u00e4n kemialliseen koostumukseen esik\u00e4sittelyolosuhteista riippuen. T\u00e4m\u00e4n lis\u00e4ksi eri vetyperoksidim\u00e4\u00e4r\u00e4ll\u00e4 havaittiin olevan vaikutusta muuhun kuin haihtuvien happojen pitoisuuteen, muista esik\u00e4sittelyparametreista kuitenkin riippuen.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2022-06-22T05:38:23Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2022-06-22T05:38:23Z (GMT). No. of bitstreams: 0\n Previous issue date: 2022", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "181", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "biomassa", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "kuidutus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "rikkivapaa", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Biomassan rikkivapaat esik\u00e4sittely- ja kuidutusmenetelm\u00e4t", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202206223546", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Kemian laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Chemistry", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Kemia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Chemistry", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4038", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "esik\u00e4sittely", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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