Banca de QUALIFICAÇÃO: ROSANGELA DALA POSSA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ROSANGELA DALA POSSA
DATA : 15/06/2018
HORA: 08:30
LOCAL: Auditório PPGEQ
TÍTULO:

Influence of the treatment of the pyrolysis of sewage sludge on methane purification by simulating the gases from the fermentation process.

PALAVRAS-CHAVES:

Purification of CH4; Sewage sludge coal; adsorption capacity; Breaking curve; Fixed bed. Adsorption model.

PÁGINAS: 88
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
ESPECIALIDADE: Processos Orgânicos
RESUMO:

Biogas is a valuable source of renewable energy, composed mainly of methane (60-80%), carbon dioxide (20-40%) and traces of ammonia and hydrogen sulfide. The greatest application of biogas is the use of the methane contained in it, mainly as fuel for the drive of electric motors / generators, and it is necessary to remove the other components as soon as their calorific value. One of the most used processes is the fall of components is an adsorption with activated carbons. The present work has the purpose of firstly to use the heat adsorption process of the activated carbon, the by-product of the process of pyrolysis of the sewage sludge, with HCl and NaOH, indicating its application, in the treatment of fixed bed , in the adsorption process of hydrogen sulphide (H

₂

S), in Ammonia (NH3) and carbon dioxide (CO

₂

) and lastly, a mixture of all inclusive gases CH

₄

. In this work the physical and physical characteristics (BET, DRX, FRX and MEV) were carried out, with a physical battery carried out at 700ºC / 2 hours / N2 and chemistry, varying the activating element (KOH 3M and HCl 7.5M). The dynamic adsorption study occurred at 25ºC, P = 1 atm, gas phase feed rate = 50 mL / min and adsorbent mass of 18.4 and 6.0 g, respectively. The results of the research on the resistance to the coal influenced significantly the adsorption of the gases. In the adsorption of H2S and CO2, the best result was for the analysis of 7.5 M HCl, the highest surface reach (248 m2 / g), the highest rupture time (400 min for H2S and 175.5 min for CO2) and saturation (1020 min for H2S and 484.5 for CO2) and higher adsorption capacity of 16.5 mg / gads and 10.142 mg / gads, respectively. The carbons were selective for NH3 and had no affinity for CH4. The percentages of adsorption of H2S were around 47.67% and 66.3% for CO2 using HCl. For the gas mixture, a percentage of adsorption of 71% for H2S and 57% for CO2 was obtained. The dynamic adsorption rate was satisfactory, through which an axial diffusivity in the bed, an effective intraparticular efficiency and the external mass transfer coefficient were estimated for H

₂

S and CO2 individuals as well as those present in the mixture.

MEMBROS DA BANCA:
Externo à Instituição - GILSON GARCIA DA SILVA - IFRN
Presidente - 350247 - JOAO FERNANDES DE SOUSA
Externo à Instituição - JUAN ALBERTO CHAVEZ RUIZ - CTGás