Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 21 for “"Magnesium hydroxide"”.
-
Kinetics of continuous precipitation in a dilute system, magnesium hydroxide
Thesis (M.S.)--Michigan State University Dept. of Chemical Engineering, 1975
-
Engineering aspects of calcium carbonate and magnesium hydroxide precipitation in waste water reclamation
… a contamination problem. Calcium carbonate and magnesium hydroxide precipitation are time dependent. As a consequence of this time dependency unstable effluent may be produced under reaction conditions commonly encountered in practice. An exhaustive study identified the major factors affecting …
-
ELECTROLYTIC DEPOSITION OF MgO ON STAINLESS STEEL SUBSTRATE
… of this thesis was to fabricate and characterize magnesium oxide coating on stainless steel alloy (SAE 316L). Electrolytic processing, followed by sintering was used for making it. Coating the heater tubes used in refinery industry with magnesium oxide is expected to increase the oxidation and …
-
Scale prevention in sea water evaporators Part II: decarbonation-filtration treatment
… of calcium sulfate, calcium carbonate, and magnesium hydroxide on the heat transfer surfaces of the evaporators. Various chemical and mechanical treatments have been successfully used by industry to prevent scale formation in fresh water distilling plants but these processes have not proved …
-
Treatment of a multicomponent mining effluent using calcium hydroxide in a fluidized bed crystallizer
… saline wastewater rich in sodium and magnesium sulphates, since these salts are prevalent in most wastewater streams. The intention was to treat the wastewater with a calcium hydroxide (Ca(OH)2) suspension in a laboratory scale seeded fluidised bed crystallizer, thereby precipitating …
-
Mg-Al Layered Double Hydroxide: A Potential Nanofiller and Flame-Retardant for Polyethylene
… research report deals with the investigation of magnesium aluminum based layered double hydroxide (LDH) as a potential nanofiller and flame-retardant for polymers with special reference to polyethylene. LDH is a mixed hydroxide of di- and trivalent metal ions that crystallizes in the form of …
-
Examination of Silica Removal with Solids Recycle for Reverse Osmosis Pretreatment
… that removal is tied mostly to the presence of magnesium. Furthermore, studies have shown that removal is best when the chemical softening process is operated at a pH of 10 or above. Magnesium hydroxide precipitates in this higher pH range thereby removing silica via a co-precipitation or …
-
Development of phase change material integrated oriented strand board for thermal energy storage
… (EG), graphite nanoplatelets (xGnP) and nano magnesium hydroxide. The results of this study show that the integration of SSPCM in oriented strand board lowers the heat flux as compared to OSB without SSPCM.
-
Scale prevention in sea water evaporators. Part III. Decarbonation, filtration, and acidification
… of the carbonates present, but in the process magnesium hydroxide is precipitated. The second step, the removal of the precipitated magnesium hydroxide, is accomplished by filtering the decarbonated sea water. The third step, the neutralization of the high alkalinity resulting from …
-
Scale prevention in sea water evaporators: Part I design and construction
… heat transfer surfaces as calcium carbonate, magnesium hydroxide, and calcium sulfate in 300 to 500 hours of operation. Although the measures directed to overcome the formation of scale in sea water evaporators have been varied, none of these measures have been as successful as desired, and …
-
The dissolution rate of chrysotile
… lung tissue contain very low concentrations of magnesium and silicon. As a result they are quite undersaturated with respect to chrysotile and chrysotile will dissolve. Its persistence in lung tissue is simply a result of its dissolution kinetics. The purpose of this study was to estimate the …
-
CO2 Separation Using Regenerable Magnesium Solutions Dissolution, Kinectics and VLSE Studies
… where CO2 from flue gases can be absorbed by magnesium hydroxide (Mg(OH)2) slurry at 52 °C in a column followed by a regeneration step in a stripper. CO2 absorption in a Mg(OH)2 slurry solution involves physical absorption of CO2 gas into the aqueous phase and subsequent chemical reactions in …
-
Formulation and Burning Behaviour of Fire Retardant Polyisoprene Rubbers
… were investigated; an equal blend of aluminium hydroxide (ATH) and magnesium hydroxide (MH) was found to yield the lowest peak release rate on the cone calorimeter. Hydrated fillers were investigated with synergists proposed in the literature. Little benefit was noted for these additives when …
-
Growth and Characterisation studies of MgO and Mg silicate dielectric layers on Si and InP surfaces
This thesis investigates the suitability of magnesium oxide (MgO) and magnesium silicate as possible high-k dielectric materials on both silicon and indium phosphide (InP) surfaces. Given that the emphasis of this study was controlling the semiconductor/high-k interface formation, the principle …
-
The Use of Numerical Methods to Interpret Polymer Decomposition Data
… containing nanoclay and/or either aluminium hydroxide or magnesium hydroxide was decomposed, with vapour phase FTIR analysis showing a change in the initial decomposition pathway with a shift from acetic acid evolution, to acetone production. In parallel, this experimental data has been used …
-
Development of seawater electrolysis with low-cost membranes for sustainable cement production and pretreatment
… used to selectively separate calcium (Ca2+) and magnesium (Mg2+) ions from seawater, precipitating them as calcium hydroxide (Ca(OH)2) and magnesium hydroxide (Mg(OH)2), respectively. These hydroxides can then be calcined into calcium oxide (CaO) and magnesium oxide (MgO), which are key raw …
-
Decomposition and Fire Retardancy of Naturally Occurring Mixtures of Huntite and Hydromagnesite.
… at a higher temperature than that of aluminium hydroxide but lower than that of magnesium hydroxide, the two most commonly used mineral fire retardants. This makes it an ideal addition to the range of materials available to polymer compounders for improving fire retardant properties. In …
-
Accelerated carbonation of wastes and minerals
… is the low conversion rate of calcium and magnesium-based minerals into thermodynamically stable carbonates under ambient temperature and pressure. Also, literature offers little information about physical techniques or chemical substances that could enhance the efficacy of accelerated …
-
Design and Operation of Multistage Flash (MSF) Desalination: Advanced Control Strategies and Impact of Fouling. Design operation and control of multistage flash desalination processes: dynamic modelling of fouling, effect of non-condensable gases on venting system design and implementation of GMC and fuzzy control
… and removal mechanisms of calcium carbonate and magnesium hydroxide with more relaxation of the assumptions. Since the MSF plant stages work as a series of heat exchangers, there is a continuous change of temperature, heat flux and salinity of the seawater. The proposed model predicts the …
-
TIMELESS QUESTIONS AND MODERN CHALLENGES: A JOURNEY FROM THE ORIGIN OF LIFE IN HYDROTHERMAL VENTS TO ELECTROCHEMICAL CO2 REDUCTION
… mainly iron (-nickel) sulphides and oxyhydroxide, separate two environments with opposite characteristics: on the ocean side an acidic environment containing CO2 and on the hydrothermal fluid side an alkaline environment containing H2. Across this mineral barrier an electrochemical …
Page 1 of 2