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Organic phosphorus compounds in wood and crude tall oil

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Kotoneva, Jari
dc.contributor.author Wang, Lei
dc.date.accessioned 2014-06-25T08:16:53Z
dc.date.available 2014-06-25T08:16:53Z
dc.date.issued 2014-06-03
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/13443
dc.description.abstract The 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.extent 73+4
dc.language.iso en en
dc.title Organic phosphorus compounds in wood and crude tall oil en
dc.type G2 Pro gradu, diplomityö en
dc.contributor.school Kemian tekniikan korkeakoulu fi
dc.subject.keyword wood cells en
dc.subject.keyword phospholipids en
dc.subject.keyword nucleotides en
dc.subject.keyword CTO en
dc.subject.keyword GC-MS en
dc.subject.keyword GC-FPD en
dc.identifier.urn URN:NBN:fi:aalto-201406252175
dc.programme.major Biorefineries fi
dc.programme.mcode KM3001 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Vuorinen, Tapani
dc.programme Master's Programme in Bioproduct Technology fi
dc.location PK fi
local.aalto.openaccess no
local.aalto.digifolder Aalto_07167
dc.rights.accesslevel closedAccess
local.aalto.idinssi 49384
dc.type.publication masterThesis
dc.type.okm G2 Pro gradu, diplomityö

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