Fixed bed biosorption and ionic exchange of aluminum by brown algae residual biomass

2021 ◽  
Vol 42 ◽  
pp. 102117
Author(s):  
Heloisa Pereira de Sá Costa ◽  
Meuris Gurgel Carlos da Silva ◽  
Melissa Gurgel Adeodato Vieira
Keyword(s):  
Brown Algae ◽  
Fixed Bed ◽  
Ionic Exchange ◽  
Residual Biomass

Heterogeneous Model of the Process of Clavulanic Acid Purification by Ionic Exchange in a Fixed-Bed Column

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Maressa Cuel ◽  
Marlei Barboza ◽  
Carlos Hokka ◽  
Wu Kwong
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Clavulanic Acid ◽  
Fixed Bed ◽  
Ion Exchange Resin ◽  
Ionic Exchange ◽  
Absorption Column ◽  
Heterogeneous Model ◽  
Axial Dispersion Coefficient ◽  
Fixed Bed Adsorption

The main factors that influence the adsorption process were studied by means of numerical simulation, based on experimental data of the rupture curve of an adsorption column employed in the purification of clavulanic acid with Amberlite IRA-400 ion-exchange resin. Starting from a heterogeneous model that describes fixed bed adsorption, three important process parameters were determined and evaluated: the degradation constant inside the pores of the resin, the global mass transfer coefficient, and the axial dispersion coefficient. The model was adjusted to the experimental data of an absorption column operating with clavulanic acid feed concentrations of 100.0; 114.0 and 122.0 mg/L, pH 6.2, at a temperature of 10°C. The results confirmed the good adjustment of the numerical simulation to the experimental data.

scholarly journals Brilliant Red HE-3B Dye Biosorption by Immobilized Residual Consortium Bacillus sp. Biomass: Fixed-Bed Column Studies

2021 ◽  
Vol 11 (10) ◽  
pp. 4498
Author(s):  
Luiza Ioana Horciu ◽  
Carmen Zaharia ◽  
Alexandra Cristina Blaga ◽  
Lacramioara Rusu ◽  
Daniela Suteu
Keyword(s):  
Municipal Wastewater ◽  
Organic Dyes ◽  
Raw Materials ◽  
Fixed Bed ◽  
Textile Dye ◽  
Bacillus Sp ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Residual Biomass ◽  
Wide Range

Residual biomass from various industries represents an important source of valuable compounds, used as raw materials for the production of a wide range of new products and also in various treatment and valorization processes or/and sanitation services, thus responding to the principles of sustainable development, waste recovery, and a green and circular economy. The aim of this work is to make use of residual Bacillus sp. biomass (resulting from a process of removing fatty acids from municipal wastewater) immobilized in alginate that, although it results in large quantities from biotechnological processes, is not reported to be valorized in dye biosorption processes, except in few specific applications. The biosorption potential of residual Bacillus sp. biomass in the reactive Brilliant Red HE-3B textile dye removal from aqueous systems was studied in a fixed-bed column. The effects of various experimental operating parameters, such as bed depth (h), flow rate (Fv), were investigated, and the modeling of experimental data based on Thomas and Yoon–Nelson kinetic models was satisfactorily achieved. The obtained results reconfirm that the studied residual biomass can be also considered as a good biosorbent in dynamic operating system, and can be beneficially used in the treatment of wastewater containing small quantities of organic dyes.

Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange

2018 ◽  
Vol 69 (4) ◽  
pp. 938-943
Author(s):  
Iuliean Vasile Asaftei ◽  
Ion Sandu ◽  
Neculai Catalin Lungu ◽  
Adrian Florin Spac ◽  
Maria Ignat
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Liquid Fraction ◽  
Fixed Bed ◽  
Liquid Product ◽  
Space Velocity ◽  
Bifunctional Catalyst ◽  
Ni Catalyst ◽  
Ionic Exchange ◽  
Exchange Method

Paraffin�s and olefins in the cracked naphtha can be transformed into aromatics and iso-paraffins to reduce the olefins content as well to improve the octane number of the gasoline commercial fraction. In this work Ni-HZSM-5 bifunctional catalyst was prepared by ion exchange with Ni(NO3)2 aqueous solution. The activity of Ni-HZSM-5 (wt.% 1.34% Ni) catalyst prepared by ion exchange method was investigated in the conversion of light hydrocarbons resulted as by-products of petroleum refining process (mixtures of butenes and (normal + iso) butanes as main components). The obtained Ni-based catalyst has been compare with HZSM-catalyst. The conversion experiments have been performed in a fixed-bed stainless-steel reactor (Twin Reactor System Naky) at 450oC, under 4 atm. (over Ni-HZSM-5) and 8 atm. pressure (over HZSM-5), respectively and at a space velocity (WHSV) of 1h-1. The catalytic activity of (Ni-HZSM-5 catalyst) monitored over 10 catalytic tests (with regeneration of catalyst after each test) using a mixtures butanes-butylenes. The catalytic activity and selectivity towards liquid products - BTX aromatic hydrocarbons and oligo(iC5-iC10, nC5-nC10, ] C10) - depends on time streaming, composition of butanes-butylenes mixture and pressure. In the first hours of each test the aromatic BTX are the main component of the liquid product (connected with butylenes consume) and after that, the oligo fraction become predominant. The initial aromatization process described as dehydrocyclodimerization of alkanes and alkenes, principally to aromatics BTX and molecular hydrogen, is accompanied by oligomerization, isomerization, cracking and alkylation processes to form finally in the liquid phase product an excessively mixture of iso- and normal - C5 -C10 and ] C10 aliphatic hydrocarbons.

Pyrolysis of brown algae (Bifurcaria Bifurcata) in a stainless steel tubular reactor: From a review to a case study

2018 ◽  
Vol 14 (1) ◽  
pp. 31-60 ◽  
Author(s):  
M. Y. Guida ◽  
F. E. Laghchioua ◽  
A. Hannioui
Keyword(s):  
Particle Size ◽  
Stainless Steel ◽  
Flow Rate ◽  
Brown Algae ◽  
Tubular Reactor ◽  
Nitrogen Flow ◽  
Nitrogen Flow Rate ◽  
Bifurcaria Bifurcata ◽  
Bio Oil

This article deals with fast pyrolysis of brown algae, such as Bifurcaria Bifurcata at the range of temperature 300–800 °C in a stainless steel tubular reactor. After a literature review on algae and its importance in renewable sector, a case study was done on pyrolysis of brown algae especially, Bifurcaria Bifurcata. The aim was to experimentally investigate how the temperature, the particle size, the nitrogen flow rate (N2) and the heating rate affect bio-oil, bio-char and gaseous products. These parameters were varied in the ranges of 5–50 °C/min, below 0.2–1 mm and 20–200 mL. min–1, respectively. The maximum bio-oil yield of 41.3wt% was obtained at a pyrolysis temperature of 600 °C, particle size between 0.2–0.5 mm, nitrogen flow rate (N2) of 100 mL. min–1 and heating rate of 5 °C/min. Liquid product obtained under the most suitable and optimal condition was characterized by elemental analysis, 1H-NMR, FT-IR and GC-MS. The analysis of bio-oil showed that bio-oil from Bifurcaria Bifurcata could be a potential source of renewable fuel production and value added chemicals.

Sign in / Sign up

Export Citation Format

Share Document