Organic phosphorus compounds in wood and crude tall oil

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.advisorKotoneva, Jari
dc.contributor.authorWang, Lei
dc.contributor.schoolKemian tekniikan korkeakoulufi
dc.contributor.supervisorVuorinen, Tapani
dc.date.accessioned2014-06-25T08:16:53Z
dc.date.available2014-06-25T08:16:53Z
dc.date.issued2014-06-03
dc.description.abstractThe main purpose of this thesis work was to investigate the phosphorus compounds in crude tall oil. The major phosphorus compounds existing in wood are phospholipids and nucleotides. Under alkaline conditions as kraft cooking and oxygen delignification, phospholipids lose two fatty acids chains, resulting in glycerophosphate structure with or without the organic ester head. Ribose-based nucleotides can be partially hydrolyzed when subjected to alkaline condition due to an intramolecular attack on phosphate by an adjacent hydroxyl group. However, deoxyribose-based nucleotides are designed to be much more stable in nature. Therefore, glycerophosphate and possibly fragments from nucleotides should exist in CTO samples. In this thesis, however, GC-FPD and GC-MS were only able to confirm the presence of inorganic phosphate in CTO samples. When selectively scanning ion m/z 299 in GC-MS, there was appearance of few unidentified peaks, which requires further research. The biggest challenge in this thesis was the low content of phosphorous in CTO. Selective ion detection with GC-MS proved to be more sensitive for phosphate than GC-FPD. In addition, GC-MS may enable direct analysis of the chemical structure depending on possible overlaps with other compounds. In future, solvent - solvent extraction could be applied to separate the more and less polar phosphorous compounds from each other.en
dc.format.extent73+4
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/13443
dc.identifier.urnURN:NBN:fi:aalto-201406252175
dc.language.isoenen
dc.locationPKfi
dc.programmeMaster's Programme in Bioproduct Technologyfi
dc.programme.majorBiorefineriesfi
dc.programme.mcodeKM3001fi
dc.rights.accesslevelclosedAccess
dc.subject.keywordwood cellsen
dc.subject.keywordphospholipidsen
dc.subject.keywordnucleotidesen
dc.subject.keywordCTOen
dc.subject.keywordGC-MSen
dc.subject.keywordGC-FPDen
dc.titleOrganic phosphorus compounds in wood and crude tall oilen
dc.typeG2 Pro gradu, diplomityöen
dc.type.okmG2 Pro gradu, diplomityö
dc.type.ontasotMaster's thesisen
dc.type.ontasotDiplomityöfi
dc.type.publicationmasterThesis
local.aalto.digifolderAalto_07167
local.aalto.idinssi49384
local.aalto.openaccessno
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