Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Johanna Kärkkäinen"'
Publikováno v:
AIMS Materials Science, Vol 10, Iss 5, Pp 862-875 (2023)
In this study, orange peel waste was successfully sulfonated with SO3-pyridine complex in 1-allyl-3-methylimidazolium chloride ionic liquid in various reaction conditions. 1H NMR was used to verify the occurrence of the reaction and to select the mos
Externí odkaz:
https://doaj.org/article/3947116faa564abebe04ecc7d682b0d3
Publikováno v:
Catalysts, Vol 10, Iss 8, p 821 (2020)
In this study, conversion of xylose to furfural was studied using lignin-based activated carbon-supported iron catalysts. First, three activated carbon supports were prepared from hydrolysis lignin with different activation methods. The supports were
Externí odkaz:
https://doaj.org/article/76a589aefa1e40d78fbbdf7361622e5c
Publikováno v:
ChemistryOpen, Vol 10, Iss 10, Pp 1004-1012 (2021)
ChemistryOpen
ChemistryOpen
Choline chloride (ChCl) / glycolic acid (GA) deep eutectic solvent (DES) media with high water content but without any additional catalyst are introduced in furfural and 5‐hydroxymethylfurfural (HMF) production. The effects of water content, reacti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ef40816cf8d04cd2001e4e6cde4b493
https://doaj.org/article/b187bda20b474e7ebda3fc763c76ffcd
https://doaj.org/article/b187bda20b474e7ebda3fc763c76ffcd
Autor:
Henrik Romar, Ulla Lassi, Katja Lappalainen, Riikka Lahti, Johanna Kärkkäinen, Tao Hu, Annu Rusanen
Publikováno v:
Catalysis Today. 357:94-101
Selective and efficient dehydration of glucose to 5-hydroxymethylfurfural (HMF) has been widely explored research problem recently, especially from the perspective of more sustainable heterogeneous catalysts. In this study, activated carbon was first
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aafe8b34af1e437e4c5495bfd9ac6dd8
https://doi.org/10.1016/j.cattod.2019.02.040
https://doi.org/10.1016/j.cattod.2019.02.040
Publikováno v:
Biomass Conversion and Biorefinery. 9:283-291
The depletion of fossil resources is driving forward the search for new and alternative renewable feedstocks in the production of renewable chemicals, which could replace the petroleum-based ones. One such feedstock is pine (Pinus sylvestris) sawdust
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d618af9e1a2ae685575a0f1470dbebc
https://doi.org/10.1007/s13399-018-0357-z
https://doi.org/10.1007/s13399-018-0357-z
Publikováno v:
Catalysts, Vol 10, Iss 821, p 821 (2020)
Catalysts
Volume 10
Issue 8
Catalysts
Volume 10
Issue 8
In this study, conversion of xylose to furfural was studied using lignin-based activated carbon-supported iron catalysts. First, three activated carbon supports were prepared from hydrolysis lignin with different activation methods. The supports were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d36c2911fcfd5aeb725b89c182d960c0
https://www.mdpi.com/2073-4344/10/8/821
https://www.mdpi.com/2073-4344/10/8/821
Autor:
Johanna Kärkkäinen, Anna Liisa Ruotsalainen, Yue Dong, Matti Niemelä, Ulla Lassi, Annu Rusanen, Nils Vogeler, Annamari Markkola, Piippa R. Wäli, Katja Lappalainen
Publikováno v:
Biomass Conversion and Biorefinery. 8:965-970
Levulinic acid is considered one of the most important platform chemicals. It is currently produced mainly from lignocellulosic biomasses. However, there are also other abundant biomass materials, which could be used as raw materials for levulinic ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5839bad5a827196cd8c8fe2a4f1dec84
https://doi.org/10.1007/s13399-018-0334-6
https://doi.org/10.1007/s13399-018-0334-6
Autor:
Ulla Lassi, Matheswaran Pranesh, Kallidanthiyil Chellappan Lethesh, Jean-Marc Lévêque, Syed Nasir Shah, Yue Dong, Hanna Prokkola, Johanna Kärkkäinen
Publikováno v:
Journal of Molecular Liquids. 264:24-31
Protic ionic liquids (ILs) with seven-membered azepanium cation were synthesized and characterized. The molecular structure of the synthesized ILs was confirmed using 1H NMR and 13C NMR spectroscopy. In one hand, sulfonic acid ( SO3H) group was tethe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::346117ef66fc09df6ab11e2f5af79445
https://doi.org/10.1016/j.molliq.2018.05.031
https://doi.org/10.1016/j.molliq.2018.05.031
Autor:
Katja Lappalainen, Eveliina Kuorikoski, Elise Vanvyve, Yue Dong, Johanna Kärkkäinen, Matti Niemelä, Ulla Lassi
Enormous amounts of fiber sludge are generated annually by the pulp industry as a by-product. As a cellulose-rich material, its current usage, mainly as fuel, is inefficient from a material efficiency point of view. This work studied the utilization
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::323dc66b648e31d2ef61a8acb7b5e947
http://urn.fi/URN:NBN:fi:jyu-201908283943
http://urn.fi/URN:NBN:fi:jyu-201908283943
Publikováno v:
Starch - Stärke. 68:854-863
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b39f660a356ede0f3d23e304c1b107d
https://doi.org/10.1002/star.201600155
https://doi.org/10.1002/star.201600155