Gozde Duman

Ege University · Department of Chemistry

The earthquake with a magnitude of 6.9 occurred in the north of Samos Island on October 30, 2020, and caused great damage to Izmir. The main shock quickly destroyed 17 buildings in Bayraklı and caused the death of 117 people. Bayraklı district, where the earthquake caused the most damage, is 70 km far from the earthquake epicenter, remind the possi...

Intensive growth of poultry production leads to generation of a large-scale accumulation of wastes, which is a critical concern for poultry farming. An environmentally friendly and effective solution is still being sought for sustainable management of poultry manure. In this study, evaluation of poultry manure both as a carbon source for production...

In this study, the effects of different pretreatment methods on the biochemical methane potential (BMP) of hurds from two hemp species, namely Narlısaray (NS) and Futura 75 (F), were investigated. The effect of pretreatment on BMP was discussed on the basis of the change in the chemical constituents of the raw material. The highest BMP yields of 27...

Air pollution is a topic of important global concern because it has contributed significantly to an increase in the earth's global warming potential and contributed to severe health and environmental impacts. In this review, the different bioreactor configurations commonly used for waste gas treatment, namely the biofilters, the biotrickling filter...

The combustion performance of chars derived from vine shoots, wheat straw, and corn stover was investigated to assess the influence of both the biomass precursor and pyrolysis operating conditions. Chars were produced through slow pyrolysis at different peak temperatures (350 and 500 °C), pressures (0.1 and 0.5 MPa), and residence times of the vapo...

This study compares two thermal pre-treatment methods in the production of energy densified solid fuel from agricultural wastes. Olive tree pruning (OP) and vineyard pruning (VP) were subjected to torrefaction and hydrothermal carbonization (HTC) and characterized for fuel applications. Although both processes improved the fuel properties of prunin...

This study investigated the use of textile waste based biochars as fabric additives to improve the clothing performance and impart functional properties to textile materials. For this purpose, cotton, cotton/polyester and acrylic textile wastes were carbonized at low temperature and derived biochars were applied onto cotton fabrics by conventional...

As an alternative to biomass, biochar is known as a promising candidate to replace or co-process with coal as solid fuel. In this study, biochars were obtained from pyrolysis of olive tree pruning (OP) at different temperatures and duration in order to investigate their possible use in combustion and gasification processes alone or with lignite. St...

The aim of this study was to comparatively evaluate the effect of hydrothermal carbonization (HTC) conditions on the yield and the fuel properties of hydrochar obtained from food waste (FW) and its digestate (FD). The mass yield of hydrochars from FW and FD were found between 47.0 and 69.8%, 43.0 and 58.2%, respectively, under tested conditions. Ba...

Two-stage steam gasification process, including gasification and volatile reforming steps was proposed to produce hydrogen rich gas from spent coffee residues. For comparison purpose, one-stage steam gasification process was also performed. It was aimed to enhance the hydrogen rich gas production by using of coffee residue biochars. A special focus...

In this study, torrefaction of sunflower seed cake and hydrogen production from torrefied sunflower seed cake via steam gasification were investigated. Torrefaction experiments were performed at 250, 300 and 350 °C for different times (10–30 min). Torrefaction at 300 °C for 30 min was selected to be optimum condition, considering the mass yield and...

The impact of torrefaction on the NO and SO2 emissions from combustion of biomass was investigated. Combustion experiments were carried out with two torrefied biomass fuels, i.e., poultry litter and olive tree pruning and their blends with lignite using a bench scale single particle reactor. For comparison, NO and SO2 emissions from tests with unto...

This study examined the influence of process variables on the hydrochar production from wet biomasses and compared the agronomic value of hydrochars with that of the biochars produced by dry carbonization. Response surface methodology was used to investigate the effect of each three process variables (temperature, biomass:water ratio and reaction t...

In this study, two thermochemical processes, namely steam gasification and supercritical water gasification (SCWG), were comparatively studied to produce hydrogen from food wastes containing about 90% water. The SCWG experiments were performed at 400 and 450 °C in presence of catalyst (Trona, K2CO3 and seaweed ash). The maximum hydrogen yield was o...

In this study, the effect of process variables, such as temperature, biomass:water ratio and reaction time, in hydrothermal carbonization (HTC) has been studied for different type biomasses. Response surface methodology was used to study the influence of each factors as well as their combined interactive effect on the mass yield and energy density...

In this study, different char based catalysts were evaluated in order to increase hydrogen production from the steam pyrolysis of olive pomace in two stage fixed bed reactor system. Biomass char, nickel loaded biomass char, coal char and nickel or iron loaded coal chars were used as catalyst. Acid washed biomass char was also tested to investigate...

In this study, CO2 gasification of raw and acid-washed chars obtained from various types of lignocellulosic biomasses (woody and agricultural waste biomasses) was studied under isothermal conditions (850 °C) using thermal gravimetric analysis. The effect of surface area and alkali/earth alkali metals on the reactivity of the chars was investigated....

The thermal and catalytic pyrolysis of safflower oil cake was studied in a dual reactor system over catalyst; the first reactor containing no catalyst whereas the second reactor containing catalyst to upgrade the thermally cracked products. For comparison, pyrolysis experiments were also carried out in a single reactor system. The aim was to study...

The main objective of this study was to evaluate the feasibility of pistachio shell as a biomass feedstock for the production of fungicidal oil and a precursor for the production of activated carbon by physical activation. For this purpose, pistachio shell was pyrolyzed in a fixed bed reactor at the different temperatures (300–600°C). The pyrolysis...

The slow and fast pyrolysis of cherry seeds (CWS) and cherry seeds shells (CSS) was studied in fixed-bed and fluidized bed reactors at different pyrolysis temperatures. The effects of reactor type and temperature on the yields and composition of products were investigated. In the case of fast pyrolysis, the maximum bio-oil yield was found to be abo...

In this study, the activated carbons were prepared from pine cone by chemical activation. Boehm titration and FT-IR analysis were conducted to determine the surface groups of the activated carbons while N2 adsorption (77 K) was carried out to evaluate their pore characteristics. Zinc chloride produced activated carbon with a higher surface area and...