| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document Help

Title:Karakterizacija in vrednotenje produktov torefikacije pomarančnih ostankov za energetsko in adsorpcijsko uporabo : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:ID Prem, Lučka (Author)
ID Urbancl, Danijela (Mentor) More about this mentor... New window
ID Simonič, Marjana (Comentor)
Files:.pdf UN_Prem_Lucka_2026.pdf (5,21 MB)
MD5: 29D2C14CED77DE941A88DD9D3C37A8A2
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:V diplomskem delu smo preučevali možnost uporabe pomarančnih ostankov kot surovine za pripravo energijsko izboljšanega materiala in potencialnega adsorbenta za odstranjevanje fosfata iz vodnih raztopin. Pomarančni ostanki zaradi velike razpoložljivosti, visoke vsebnosti organskih snovi in možnosti nadaljnje predelave predstavljajo obetavno surovino za vključevanje v koncepte krožnega gospodarstva. Vzorce različnih granulacij smo toreficirali pri dveh različnih temperaturah in dveh zadrževalnih časih. Pridobljene materiale smo ovrednotili z določanjem masnega in energijskega izkoristka, zgornje kurilne vrednosti, elementne sestave, vezave vlage ter z uporabo FTIR, TGA/DTG in TG-FTIR analiz. Izbrane vzorce smo modificirali s kalcijem in uporabili za adsorpcijo fosfata. Rezultati so pokazali, da je imela na lastnosti toreficirane biomase največji vpliv temperatura torefikacije. Pri višji temperaturi sta se masni in energijski izkoristek zmanjšala, povečali pa sta se zgornja kurilna vrednost in energijska gostota materiala. Torefikacija je zmanjšala vsebnost vlage in hlapnih snovi, povečala delež fiksnega ogljika ter izboljšala hidrofobnost in termično stabilnost vzorcev. FTIR in elementna analiza sta potrdili zmanjšanje kisikovih funkcionalnih skupin ter nastanek bolj karbonizirane strukture. Modifikacija s kalcijem je izboljšala sposobnost vezave fosfata, adsorpcijska kinetika pa se je najbolje prilegala modelu psevdo drugega reda. Ugotovili smo, da je iz pomarančnih ostankov mogoče pridobiti energijsko bogatejši material, ki omogoča nadaljnjo uporabo v okoljskih aplikacijah.
Keywords:pomarančni ostanki, biomasa, torefikacija, biooglje, adsorpcija fosfata
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[L. Prem]
Year of publishing:2026
Number of pages:1 spletni vir (1 datoteka PDF (XI, 60 str.))
PID:20.500.12556/DKUM-98663 New window
UDC:66.046.4:[628.4.042:634.31](043.2)
COBISS.SI-ID:285167107 New window
Publication date in DKUM:17.07.2026
Views:197
Downloads:66
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
Copy citation
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share



Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Licences

License:CC BY-ND 4.0, Creative Commons Attribution-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nd/4.0/
Description:Under the NoDerivatives Creative Commons license one can take a work released under this license and re-distribute it, but it cannot be shared with others in adapted form, and credit must be provided to the author.
Licensing start date:29.06.2026

Secondary language

Language:English
Title:Characterization and evaluation of orange residues torrefaction products for energy and adsorptive applications
Abstract:In this diploma thesis, we investigated the potential use of orange residues as a raw material for the preparation of an energy-enhanced material and as a potential adsorbent for phosphate removal from aqueous solutions. Due to their high availability, high organic matter content, and potential for further processing, orange residues represent a promising raw material for integration into circular economy concepts. Samples of various particle sizes were torrefied at two different temperatures and two residence times. The resulting materials were evaluated by determining mass and energy yield, higher heating value, elemental composition, moisture adsorption, and through FTIR, TGA/DTG, and TG-FTIR analyses. Selected samples were modified with calcium and used for phosphate adsorption. The results showed that torrefaction temperature had the greatest influence on the properties of the torrefied biomass. At higher temperatures, mass and energy yields decreased, while the higher heating value and energy density of the material increased. Torrefaction reduced the moisture and volatile matter content, increased the fixed carbon content, and improved the hydrophobicity and thermal stability of the samples. FTIR and elemental analyses confirmed a decrease in oxygen-containing functional groups and the formation of a more carbonised structure. Calcium modification enhanced the phosphate binding capacity, and the adsorption kinetics were best described by the pseudo-second-order model. We found that orange residues could be converted into a more energy-rich material, with potential for further use in environmental applications.
Keywords:orange residues, biomass, torrefaction, biochar, phosphate adsorption


Comments

Leave comment

You must log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica