Study of the reaction between dolomite and nitric acid

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43916288" target="_blank" >RIV/60461373:22310/19:43916288 - isvavai.cz</a>

Result on the web

<a href="http://www.minproc.pwr.wroc.pl/journal/pdf/ppmp18140.pdf" target="_blank" >http://www.minproc.pwr.wroc.pl/journal/pdf/ppmp18140.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5277/ppmp18140" target="_blank" >10.5277/ppmp18140</a>

Result language

angličtina

Original language name

Study of the reaction between dolomite and nitric acid

Original language description

This paper is focused on the kinetics of the reaction between natural dolomite and diluted solutions of nitric acid at various temperatures. All experiments were carried out in a semi-batch reactor with an approximately constant nitric acid concentration using the pH-stat titration method. The reaction was studied in the temperature range from 293 to 353 K and the nitric acid concentration in the range from 0.001 to 0.200 mol dm-3. The strong effects of both temperature and nitric acid concentration were observed. The determined fractional values of the apparent reaction order (0.39 to 0.75) indicate a very complex reaction mechanism. In the studied concentration range, the values of the apparent activation energy increase from 30 to 58 kJ mol-1. Based on these data it can be assumed that the reaction takes place in the transitional regime with the stronger influence of chemical reaction. This assumption was verified by calculation of the nitric acid concentration on the surface of the dolomite grain using Sherwood criterion equation. The change in the role of the rate-controlling step was found for highly diluted solutions (&lt; 0.010 mol dm-3 HNO3).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physicochemical Problems of Mineral Processing

ISSN

1643-1049

e-ISSN

—

Volume of the periodical

55

Issue of the periodical within the volume

2

Country of publishing house

PL - POLAND

Number of pages

10

Pages from-to

370-379

UT code for WoS article

000465257600005

EID of the result in the Scopus database

2-s2.0-85062286547