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Pregled bibliografske jedinice broj: 1002360

Experimental study on the ash transformation during pressurized oxy-biomass combustion


Zhang, Jiaye; Bai, Shengjie; Liu, Zihan; Zhu, Lihua; Mikulčić, Hrvoje; Wang, Xuebin; Vujanović, Milan; Tan, Houzhang
Experimental study on the ash transformation during pressurized oxy-biomass combustion // Digital Proceedings of the 3rd South East European Conference on Sustainable Development of Energy, Water and Environment Systems - 3rd SEE SDEWES / Ban, Marko (ur.). (ur.).
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018. SEE.SDEWES2018.0014, 9 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Experimental study on the ash transformation during pressurized oxy-biomass combustion

Autori
Zhang, Jiaye ; Bai, Shengjie ; Liu, Zihan ; Zhu, Lihua ; Mikulčić, Hrvoje ; Wang, Xuebin ; Vujanović, Milan ; Tan, Houzhang

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Digital Proceedings of the 3rd South East European Conference on Sustainable Development of Energy, Water and Environment Systems - 3rd SEE SDEWES / Ban, Marko (ur.). - Zagreb : University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2018

Skup
3rd South East European Conference on Sustainable Development of Energy, Water and Environment Systems - 3rd SEE SDEWES

Mjesto i datum
Novi Sad, Srbija, 30.06.-04.07.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Biomass ash ; pressurized oxy-combustion ; potassium ; chlorine.

Sažetak
Oxy-biomass combustion is one of the most promising technologies for negative CO2 emission. However, the first-generation oxy- combustion technologies, which operate under atmospheric pressure, suffer from a significant penalty in net generating efficiency, of over 10 percentage points. This is primarily due to the auxiliary energy consumption from the air separation unit (ASU), flue gas recirculation (FGR), and gas processing unit (GPU). By operating oxy-combustion under pressurized condition, the plant efficiency can be increased because the latent heat in the flue gas moisture can be recovered and coupled back into the steam cycle. Pressurized oxy- combustion has been regarded as the most promising technology for CO2 capture. In this study, we propose to burn biomass using pressurized oxy-combustion technology, named “Pressurized Oxy-biomass Combustion (POBC)”, which can achieve an acceptable cost for CO2 capture with a high net generating efficiency. However, the alkali metal and chlorine contents in biomass are high, resulting in severer slagging, ash deposition, and corrosion in biomass-fired furnace. What is worse, these problems can be aggravated under POBC conditions, because the significantly increased partial pressure of alkali vapor drives these vapor condensed and deposited at a much higher temperature than that under atmospheric pressure conditions. At the moment, there is no report on the mineral transformation of biomass ash during POBC process. In this study, the mineral transformation of biomass during POBC process is investigated in a pressurized fix- bed reactor. The effects of pressure (1-10 bar), temperature (500-1000 °C), atmosphere (O2/N2, O2/CO2), and aluminum-silicon additives (kaolin) on the ash mineral transformation are studied. The morphologies, elemental compositions, and mineral composition of the produced biomass ash under varied conditions are characterized using scanning electron microscopy equipped with energy dispersive X- ray spectrometry (SEM-EDS) and X-ray fluorescence (XRF), respectively.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo



POVEZANOST RADA


Projekt / tema
120-1201918-1920 - Racionalno skladištenje energije za održivi razvoj energetike (Neven Duić, )

Ustanove
Fakultet strojarstva i brodogradnje, Zagreb