scholarly journals Characterization of Biomass Bottom Ash from an Industrial Scale Fixed-Bed Boiler by Fractionation

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Adrian K. James ◽  
Ronald W. Thring ◽  
P. Michael Rutherford ◽  
Steve S. Helle
Keyword(s):  
Fixed Bed ◽  
Bottom Ash ◽  
Industrial Scale

Characterization of lead-bearing phases in municipal waste combustor fly ash

1996 ◽  
Vol 54 ◽  
pp. 516-517
Author(s):  
L. L. Sutter ◽  
G. R. Dewey ◽  
J. F. Sandell
Keyword(s):  
Fly Ash ◽  
Bottom Ash ◽  
Municipal Waste ◽  
Primary Concern ◽  
Leaching Behavior ◽  
Waste Combustion ◽  
Lead And Cadmium ◽  
Lead Speciation ◽  
Accepted Practice

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.

Fixed-bed adsorption of tannery wastewater pollutants using bottom ash: An optimized process

2021 ◽  
Vol 22 ◽  
pp. 100868
Author(s):  
Ghita El mouhri ◽  
Mohammed Merzouki ◽  
Rabie Kachkoul ◽  
Hajar Belhassan ◽  
Youssef Miyah ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Bottom Ash ◽  
Tannery Wastewater ◽  
Fixed Bed Adsorption ◽  
Wastewater Pollutants

scholarly journals Industrial scale gasification of T-grade coal via fixed bed technology

2021 ◽  
Vol 1749 ◽  
pp. 012034
Author(s):  
K V Slyusarskiy ◽  
A S Matveev ◽  
S A Yankovsky ◽  
V E Gubin
Keyword(s):  
Fixed Bed ◽  
Industrial Scale

Synthesis and characterization of cobalt-doped molybdenum carbides produced in a fixed bed reactor

2018 ◽  
Vol 44 (16) ◽  
pp. 20551-20555 ◽  
Author(s):  
S.L.A. Dantas ◽  
A.L. Lopes-Moriyama ◽  
M.S. Sena ◽  
C.P. Souza
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Synthesis And Characterization ◽  
Molybdenum Carbides

scholarly journals Influence of Drying in Hyptis pectinata Essential Oil

2018 ◽  
Vol 10 (4) ◽  
pp. 96
Author(s):  
Núbia Angélica de Ávila Branquinho ◽  
Fabiano Guimarães Silva ◽  
Osvaldo Resende ◽  
Luiz Cláudio Almeida Barbosa ◽  
Daniel Emanuel Cabral de Oliveira ◽  
...  
Keyword(s):  
Essential Oil ◽  
Anhydrous Sodium Sulfate ◽  
Fixed Bed ◽  
Chemical Characterization ◽  
Automated System ◽  
Caryophyllene Oxide ◽  
System A ◽  
Different Temperatures ◽  
Drying Conditions

The present study assessed the effects of drying at different temperatures (35, 45 and 55 °C) and air velocities (1 and 2 m s-1) on the content and chemical characteristics of Hyptis pectinata essential oil. Drying was conducted in a fixed-bed dryer, and the temperatures and air velocities were controlled and recorded by an automated system. A 350±0.12 g quantity of fresh leaves was used for each of the four repetitions in each dryer. From the material obtained after drying, 60 g of each repetition was used to extract essential oil by the hydrodistillation method. Dichloromethane was used as the solvent, and anhydrous sodium sulfate was used as the desiccating agent. Gas chromatography in the forms of GC-MS and GC-FID were used for the chemical characterization of the essential oil compounds. Decreasing drying times and decreasing concentrations of essential oils were observed with increasing temperatures. A GC-MS analysis of the essential oil from H. pectinata leaves led to the identification of 19 compounds. A sesquiterpene called caryophyllene oxide was the most abundant compound under all drying conditions, with the highest concentration at a temperature of 55 °C, ranging from approximately 42 to 53%.

Characterization of Elephant Grass Ash as a Potential Clay Ceramic Addition

2014 ◽  
Vol 805 ◽  
pp. 585-590 ◽  
Author(s):  
Aline Marcia Ferreira Dias da Silva ◽  
Karla Albernaz Sales ◽  
Veronica Scarpini Candido ◽  
Sergio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Electron Microscopy ◽  
Bottom Ash ◽  
Ceramic Production ◽  
Elephant Grass ◽  
Red Clay ◽  
Clay Body ◽  
Clay Ceramics ◽  
Fluxing Agent ◽  
Scanning Electron

The elephant grass (Pennicetum purpureum) is traditionally used both as fresh feedstock for cattle and, dried, as fuel for ceramic production in Campos dos Goytacazes, Brazil. In the present work the bottom ash generated after dry grass incineration in a ceramic furnace was characterized for a possible addition into red clay ceramics. The characterization comprised the ash morphology by laser microscopy, scanning electron microscopy coupled with EDS and thermal behavior by thermogravimetry as well as differential thermal analysis. These results indicated that the elephant grass ash could be added into a clay body not only as a fluxing agent but also to improve the particles compaction before firing.

Sign in / Sign up

Export Citation Format

Share Document