INVESTIGATION OF BIOMASS AND BIOPLASTIC WASTES USING FAST HEATING RATE THERMOCHEMICAL PROCESSES

Download

ME-Alican Akgül-MSc Thesis - v2.pdf

Date

2022-8-25

Author

Akgül, Alican

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

291
views

311
downloads

The objective of this work was the investigation of sugar beet pulp biomass and polyhydroxyalkanoates (PHAs) bioplastic wastes using fast heating and slow heating rate thermochemical processes. Biomass pyrolysis was conducted under a nitrogen, carbon dioxide, and steam atmosphere using low heating rate horizontal tube furnace (HTF) and high heating rate drop tube furnace (DTF). The biochars were gasified under carbon dioxide using low thermogravimetric analyzer (TGA) and high heating rate wire mesh reactor (WMR). The results showed that HTF pyrolysis increased the graphitization. DTF biochars showed higher meso- and macro-porosity. Therefore, the DTF biochars showed higher gasification reactivity both in TGA and WMR. On the other hand, gasification reactivity at WMR was higher than the TGA due to thermal annealing of biochars in TGA. In the second part of the thesis, PHAs together with conventional counterparts polyethylene terephthalate (PET), carbon fiber reinforced composite (CFRC), and block co-polymers were pyrolyzed. TGA and differential scanning calorimetry (DSC) analyses were performed for PHA, CFRC, and block co-polymers to investigate the thermal stability. The fast pyrolysis (500 oC, ∼102 °Cs−1) WMR experiments were conducted for all samples to investigate tar products and char yields. The tar compositions were investigated by gas chromatography–mass spectroscopy (GC–MS). The char yields of block co-polymers and PHA samples (< 2 wt. %) were less than that of the PET sample (~10.7 wt.%). All PHA compounds contained a large fraction of ethyl cyclopropane carboxylate (~38-58%) that can serve as building blocks.

Subject Keywords

Bioplastic, Sugar beet pulp, Pyrolysis, Gasification, Wire mesh reactor (WMR)

URI

https://hdl.handle.net/11511/98789

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Investigation of thermal degradation characteristics of polyamide-6 containing melamine or melamine cyanurate via direct pyrolysis mass spectrometry Isbasar, Ceyda; Hacaloğlu, Jale (2012-01-01) In this work the changes in thermal degradation characteristics of polyamide 6 (PA6) in the presence of melamine (Me) or melamine cyanurate (MC) were investigated systematically via direct pyrolysis mass spectrometry. Though thermal stability of PA6 was not affected by the presence of flame retardants, the changes in the products and in their distributions were detected. The reaction of carbonyl groups of PA6 with amine groups of melamine was the main cause for the changes in the product distribution. In th...
Extraction of Essential Oil from Laurel Leaves by Using Microwaves Bayramoglu, Beste; Şahin, Serpil; Şümnü, Servet Gülüm (Informa UK Limited, 2009-01-01) The effects of microwave power and time in solvent-free microwave extraction (SFME) on the yield and composition of the essential oil obtained from laurel (Laurus nobilis L.) leaves were studied. The extraction was also performed by hydrodistillation as a control. Specific gravities and refractive indices of the essential oils obtained by different methods and at various conditions were also examined. The main constituent of laurel essential oil was 1,8-cineole (630-730mg/mL). Essential oils obtained by SFM...
Characterization of lignocellulose biomass and model compounds by thermogravimetry Kök, Mustafa Verşan (Informa UK Limited, 2017-01-01) In this research, combustion characteristics of lignocellulose biomass (hazelnut shell) and three main components (cellulose, hemicellulose, and lignin) were investigated using thermogravimetry (TGA-DTG) technique at different heating rates. The ignition, peak, burn-out temperatures, and the heat liberation of lignocellulose biomass and three main components were also measured. Two different model-free kinetic methods, known as Ozawa-Flynn-Wall (OFW) and Kissinger-Akahira-Sunose (KAS), were used in order to...
Investigation of the use of aerobic granules for the treatment of sugar beet processing wastewater KOCATURK, İREM; Bayramoğlu, Tuba Hande (2015-10-18) The treatment of sugar beet processing wastewater in aerobic granular sequencing batch reactor (SBR) was examined in terms of chemical oxygen demand (COD) and nitrogen removal efficiency. The effect of sugar beet processing wastewater of high solid content, namely 2255 +/- 250mg/L total suspended solids (TSS), on granular sludge was also investigated. Aerobic granular SBR initially operated with the effluent of anaerobic digester treating sugar beet processing wastewater (Part I) achieved average removal ef...
Investigation of alternative biomass fuels and Turkish lignites at high heating rate pyrolysis and combustion conditions Magalhaes, Duarte; Kazanç Özerinç, Feyza; Yozgatlıgil, Ahmet; Department of Mechanical Engineering (2021-2-12) The objective of this work was to investigate alternative Turkish fuels fortheir ignition, combustion, pyrolysis, and gasification behavior and to select alternative fuels for co-firing, co-pyrolysis, and co-gasification applications based on low and high heating rate experimental results. Agricultural biomass (olive residue, almond shell, and hazelnut shell)and Turkish lignites (Tunçbilek, and Soma) were chosen as the feedstocks. Severalexperimental rigs used such as thermogravi...

Citation Formats

A. Akgül, “INVESTIGATION OF BIOMASS AND BIOPLASTIC WASTES USING FAST HEATING RATE THERMOCHEMICAL PROCESSES,” M.S. - Master of Science, Middle East Technical University, 2022.