Title: Effects of preparation conditions on performance of discarded biological oil as coal flotation collectors

Authors: Guojie Zhang

Addresses: Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan Shanxi 030024, China

Abstract: Discarded biological oil was modified under various preparation conditions to produce coal flotation collectors to replace traditional petroleum flotation collectors. Effect of alcohol-oil molar ratio, catalyst dosage, reaction temperature and reaction time on clean coal yield was investigated. The results showed that the flotation collectors made from discarded biological had higher clean coal yield. Through orthogonal and single-factor tests, the best modified parameters were obtained, at a temperature of 50°C, an alcohol-oil molar ratio of 8:1, a potassium hydroxide (KOH) catalyst of 0.5% and a reaction time of 2.5 h. The alcohol-oil molar ratio and catalyst dosage were the most important factors to influence the performance of the flotation collectors. Under optimal conditions, the coal flotation collectors had higher clean coal yield than ordinary diesel oil or kerosene, and clean coal ash was also lower. Coal ash and clean coal yield were 7.93% and 58.54% under biological oil flotation collectors, while coal ash and clean coal yield were 8.29% and 57.65% under diesel flotation collectors. [Received: February 7, 2013; Accepted: December 31, 2013]

Keywords: process optimisation; discarded biological oil; coal flotation collectors; coal technology; preparation conditions; petroleum flotation collectors; alcohol-oil molar ratio; catalyst dosage; reaction temperature; reaction time; clean coal yield; potassium hydroxide; diesel oil; kerosene; clean coal ash; diesel flotation collectors.

DOI: 10.1504/IJOGCT.2015.070835

International Journal of Oil, Gas and Coal Technology, 2015 Vol.10 No.2, pp.194 - 203

Received: 09 Feb 2013
Accepted: 06 Jan 2014
Published online: 30 Jul 2015 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article