The effect of acid treatment and calcination on the modification of zeolite X in diesel fuel hydrodesulphurization

2021 ◽  
Author(s):  
Hamid Karami ◽  
Mohammad Kazemeini ◽  
Saeed Soltanali ◽  
Mehdi Rashidzadeh
Keyword(s):  
Diesel Fuel ◽  
Acid Treatment ◽  
Zeolite X

scholarly journals Synthesis of X-Zeolite from Waste Basalt Powder and its Influencing Factors and Synthesis Mechanism

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3895
Author(s):  
Guojun Ke ◽  
Haichen Shen ◽  
Pengfei Yang
Keyword(s):  
Hydrothermal Method ◽  
Calcination Temperature ◽  
Crystallization Temperature ◽  
Acid Treatment ◽  
Alkali Basalt ◽  
Raw Material ◽  
Synthesis Process ◽  
Zeolite X ◽  
Synthesis Mechanism ◽  
Alkali Fusion

Traditional hydrothermal method (TH) and alkali fusion-assisted hydrothermal method (AFH) were evaluated for the preparation of zeolites from waste basalt powder by using NaOH as the activation reagent in this study. The synthesized products were characterized by BET, XRD, FTIR and SEM. The effects of acid treatment, alkali/basalt ratio, calcination temperature and crystallization temperature on the synthesis process were studied. The results showed that AFH successfully synthesized zeolite X with higher crystallinity and no zeolite was formed by TH. The specific surface area of synthetic zeolite X was 486.46 m2·g−1, which was much larger than that of original basalt powder (12.12 m2·g−1). Acid treatment and calcination temperature had no effect on zeolite types, but acid treatment improved the yield and quality of zeolite. Alkali/basalt ratio and crystallization temperature not only affected the crystallinity of synthesized zeolites but also affected its type. The optimum synthesis condition of zeolite X are as follows: acid treatment of 5 wt% HCl solution, NaOH/basalt ratio of 1:1, a calcination temperature of 650 °C and crystallization temperature of 120 °C. The work shows that basalt can be used as a raw material to prepare zeolite.

Fasciaton of Pectate Elementary Fibrils

1973 ◽  
Vol 31 ◽  
pp. 60-61
Author(s):  
George F. Leeper
Keyword(s):  
Acid Treatment ◽  
Carbon Film ◽  
Final Concentration ◽  
Cellulose Microfibrils ◽  
Pectic Acid ◽  
Elementary Fibrils

Polysaccharide elementary fibrils are usually fasciated into microfibrils of from one hundred to a few hundred Angstroms wide. Cellulose microfibrils when subjected to acid treatment dissociate into component elementary fibrils. For pectic acid it was observed that variations in pH could cause a change in the fasciation of the elementary fibrils.Solutions of purified pectic acid and sodium phosphotungtate were adjusted to various pH levels with NaOH or HCl and diluted to give a final concentration of 0.5 and 1% for the polysaccharide and negative stains respectively. Micrographs were made of the samples after drying on a carbon film covered grid. The average number of elementary fibrils was determined by counting the number of elementary fibrils in each fascicle intersected by lines drawn across the micrograph.

Does anti-acid treatment influence disease progression in SSc-ILD? Data form the German SSc-network

2020 ◽  
Author(s):  
M Kreuter ◽  
F Bonella ◽  
N Blank ◽  
E Siegert ◽  
J Henes ◽  
...  
Keyword(s):  
Disease Progression ◽  
Acid Treatment ◽  
Data Form

Effect of valproic acid treatment on body composition, leptin and soluble leptin receptor in epileptic children

2006 ◽  
Vol 37 (06) ◽  
Author(s):  
M Rauchenzauner ◽  
E Haberlandt ◽  
S Scholl-Bürgi ◽  
D Karall ◽  
E Schönherr ◽  
...  
Keyword(s):  
Valproic Acid ◽  
Body Composition ◽  
Acid Treatment ◽  
Leptin Receptor ◽  
Soluble Leptin Receptor ◽  
Epileptic Children

Improvement of chemmotological properties of diesel fuel by micro-addition of carbon spheroidal nanoparticles

2020 ◽  
pp. 59-66
Author(s):  
Ie.V. Polunkin ◽  
◽  
V.S. Pilyavsky ◽  
Ya.O. Bereznitsky ◽  
T.M. Kamenieva ◽  
...  
Keyword(s):  
Diesel Fuel

DIESEL ENGINE OPERATION IN USE OF FUEL WITH ADDITIVES

2018 ◽  
pp. 18-24
Author(s):  
Petar Kazakov ◽  
Atanas Iliev ◽  
Emil Marinov
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Experimental Studies ◽  
Combustion Engines ◽  
Engine Operation ◽  
Factors Affecting ◽  
Operating Modes ◽  
Positive Effects

Over the decades, more attention has been paid to emissions from the means of transport and the use of different fuels and combustion fuels for the operation of internal combustion engines than on fuel consumption. This, in turn, enables research into products that are said to reduce fuel consumption. The report summarizes four studies of fuel-related innovation products. The studies covered by this report are conducted with diesel fuel and usually contain diesel fuel and three additives for it. Manufacturers of additives are based on already existing studies showing a 10-30% reduction in fuel consumption. Comparative experimental studies related to the use of commercially available diesel fuel with and without the use of additives have been performed in laboratory conditions. The studies were carried out on a stationary diesel engine СМД-17КН equipped with brake КИ1368В. Repeated results were recorded, but they did not confirm the significant positive effect of additives on specific fuel consumption. In some cases, the factors affecting errors in this type of research on the effectiveness of fuel additives for commercial purposes are considered. The reasons for the positive effects of such use of additives in certain engine operating modes are also clarified.

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