Adsorpcija mravlje kiseline na aktivnom ugljenu u koloni

undergraduate thesis

• Title (english): Adsorption of formic acid on activated carbon in column
• Author: Ema Pollak
• Mentor: Davor Dolar (mentor)
• Committee member: Davor Dolar (predsjednik povjerenstva)
• Committee member: Juraj Šipušić (član povjerenstva)
• Committee member: Vanja Kosar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2019-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Adsorpcija je metoda separacije između krute faze i čestica u plinu ili otopini koje adsorbiraju. Veliku važnost i primjenu ima u industriji, posebice za obradu otpadnih voda, uklanjanje teških metala, otrova, bojila te mirisa. Prilikom adsorpcije proučavaju se razne veličine i parametri koji se mogu ispitati preko adsorpcijskih izotermi. Cilj ovoga rada bio je provesti adsorpciju mravlje kiseline. Adsorpcija se izvodila u kolonskom sustavu s granuliranim aktivnim ugljenom (GAC) pri različitim visinama fiksnog sloja i promjera kolone te stalne brzine protoka. Visine fiksnog sloja bile su 10, 15 i 20 cm, promjeri 3 i 4 cm, a brzina protoka 24,7 ± 3,9 mL min^-1. Ispitivanje se sastojalo od dva dijela. Prvo se preko Freundlich-ove izoterme opisala adsorpcijska ravnoteža mravlje kiseline te se onda otopina propuštala kroz kolonu. Rezultati mjerenja prikazani su preko krivulja proboja koje opisuju ovisnost omjera izlazne i ulazne koncentracije otopine (c/c0) o volumenu propuštene otopine. Parametri Freundlich-ove izoterme pokazali su dobar afinitet za adsorpciju. Prilikom usporedbe krivulja proboja kiseline različitih visina GAC-a te različitih zadanih koncentracija, vidljivo je da je adsorpcija najbolja kod najviše razine ugljena zbog većeg broja pora unutar sloja te povećanjem koncentracije otopine, adsorpcija je brža.

Abstract (english)

Adsorption is a method of separation between the solid phase and the particles in the gas or solution they adsorb. It is of great importance and application in industry, especially for wastewater treatment, removal of heavy metals, poisons, dyes and odors. During the adsorption, various sizes and parameters are studied, which can be tested via adsorption isotherms. The purpose of this paper was to perform the adsorption of formic acid. Adsorption was carried out using a granular activated carbon (GAC) column system at different heights of fixed bed and column diameter and constant flow rate. The default heights were 10, 15 and 20 cm, diameters 3 and 4 cm, and flow rate is 24.7 ± 3.9 mL min^-1. The test consisted of two parts. First, the adsorption balance of formic acid was described via the Freundlich isotherm and then the solution was passed through the column. The measurement results are presented through breakthrough curves describing the dependence of the ratio of the output and the inlet concentration of the solution (c/c0) on the volume of the leaked solution. The parameters of the Freundlich isotherm have shown a good affinity for adsorption. When comparing the acid breakdown curves of different GAC heights and different set concentrations, it is evident that adsorption is best at the highest coal level due to the larger number of pores within the layer and by increasing the concentration of the solution, the adsorption is faster.

• Keywords: adsorpcija u koloni; mravlja kiselina; granulirani aktivni ugljen; Freundlich-ova izoterma
• Keywords (english): column adsorption; formic acid; granulated active carbon; Freundlich isotherm
• Language: croatian
• URN:NBN: urn:nbn:hr:149:654116
• Study programme: Title: Materials Science and Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-05-28 15:02:23