Proizvodnja metanola z/brez obtoka sinteznega plina : diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje

Platovšek Košir, Nina

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Title:	Proizvodnja metanola z/brez obtoka sinteznega plina : diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
Authors:	ID Platovšek Košir, Nina (Author) ID Kovač Kralj, Anita (Mentor) More about this mentor... ID Kegl, Tina (Comentor)
Files:	VS_Platovsek_Kosir_Nina_2026.pdf (1,80 MB) MD5: EB07DE2D8794C2F9A36BB497DDCBC54C
Language:	Slovenian
Work type:	Bachelor thesis/paper
Typology:	2.11 - Undergraduate Thesis
Organization:	FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:	Proizvodnja metanola z/brez obtoka sinteznega plina Povzetek V diplomskem delu smo proučevali vpliv različnih obratovalnih strategij na učinkovitost procesa sinteze metanola. Namen našega dela je bil določiti optimalne procesne pogoje, ki omogočajo največjo proizvodnjo metanola ter zagotavljajo ekonomsko najbolj upravičeno obratovanje. S simulacijskim orodjem Aspen Plus smo razvili model procesne sheme, s katerim smo preučili obnašanje sistema pri različnih deležih obtoka nezreagiranega sinteznega plina ter pri različnih temperaturah in tlakih v metanolnem reaktorju. V prvem delu smo analizirali spremembe proizvodnje metanola in stranskega produkta vodika v odvisnosti od deleža obtoka v celotnem območju med 0 in 1. Rezultati so pokazali, da največ metanola nastane pri 80 % obtoku, medtem ko je obratovanje pri 100 % obtoku zaradi volumske omejitve procesa neizvedljivo. Nadalje smo ocenili vpliv temperature in tlaka v reaktorju ter ugotovili, da ima temperatura izrazito večji vpliv na nastanek produktov kot tlak. Optimalno temperaturno okno okoli 230 °C omogoča največjo proizvodnjo metanola, medtem ko višje temperature močno zmanjšajo njegovo nastajanje in povečajo delež vodika. V zaključnem delu smo izvedli ekonomsko analizo scenarijev brez obtoka in z 80 % obtokom. Čeprav je bil letni prihodek od prodaje vodika pri obtoku nižji, je skupni letni prihodek procesa z 80 % obtokom za skoraj milijon EUR presegal skupni letni prihodek procesa brez obtoka. Ključni razlog je znatno višja tržna cena metanola glede na vodik. Povzeta ključna spoznanja tega dela potrjujejo, da pravilno izbran delež obtoka bistveno vpliva na energetsko, tehnološko in ekonomsko učinkovitost proizvodnje metanola.
Keywords:	metanol, obtok, sintezni plin, trdni komunalni odpadki, Aspen Plus
Place of publishing:	Maribor
Place of performance:	Maribor
Publisher:	[N. Platovšek Košir]
Year of publishing:	2026
Number of pages:	1 spletni vir (1 datoteka PDF (VIII, 23 str.))
PID:	20.500.12556/DKUM-96603
UDC:	666.721(043.2)
COBISS.SI-ID:	269844483
Publication date in DKUM:	26.02.2026
Views:	138
Downloads:	17
Metadata:
Categories:	KTFMB - FKKT
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Licences

License:	CC BY 4.0, Creative Commons Attribution 4.0 International

Link:	http://creativecommons.org/licenses/by/4.0/
Description:	This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:	20.01.2026

Secondary language

Language:	English
Title:	Methanol production with/without the synthesis gas circulation
Abstract:	This thesis examines the impact of different operational strategies on the efficiency of the methanol synthesis process. The aim of the work was to determine the optimal process conditions that enable the highest methanol production while ensuring the most economically justified operation. Using the simulation tool Aspen Plus, we developed a process model with which we studied system’s behaviour at various recycle ratios of unreacted synthesis gas as well as at different temperatures and pressures in the methanol reactor. In the first part, we analysed changes in methanol production and the formation of hydrogen as a by-product depending on the recycle ratio across the entire range from 0 to 1. The results showed that the highest methanol production occurs at an 80 % recycle ratio, whereas operation at 100 % recycle is not feasible due to volumetric limitations of the process. We further evaluate the influence of reactor temperature and pressure and found that temperature has a significantly stronger impact on product formation than pressure. An optimal temperature window around 230 °C provides the highest methanol production, while higher temperatures drastically reduce its formation and increase the hydrogen fraction. In the final part, we performed an economic analysis of the scenarios without recycle and with an 80 % recycle ratio. Although the annual revenue from hydrogen sales was lower in the recycle scenario, the total annual revenue of the process with 80 % recycle exceeded that of the process without recycle by nearly one million EUR. The main reason is the substantially higher market price of methanol compared to hydrogen. The key findings of this work confirm that a properly selected recycle ratio significantly influences the energy, technological and economic performance of methanol production.
Keywords:	methanol, circulation, syngas, solid municipal waste, Aspen Plus

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