Experimental optimization of microwave drying zinc oxide leach residues by response surface methodology
| Autor: | Junruo Chen, Guo Lin, Weifeng Zhang, Libo Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Health Toxicology and Mutagenesis General Chemical Engineering Metallurgy microwave drying chemistry.chemical_element 04 agricultural and veterinary sciences Zinc 010501 environmental sciences 040401 food science 01 natural sciences Industrial and Manufacturing Engineering response surface methodology Chemistry 0404 agricultural biotechnology Fuel Technology chemistry zinc oxide leach residues Environmental Chemistry Response surface methodology optimization QD1-999 Microwave 0105 earth and related environmental sciences |
| Zdroj: | Green Processing and Synthesis, Vol 6, Iss 5, Pp 523-532 (2017) |
| ISSN: | 2191-9550 2191-9542 |
| DOI: | 10.1515/gps-2016-0101 |
| Popis: | Response surface methodology (RSM) and Box-Behnken design (BBD) were applied to experiment optimization of microwave drying zinc oxide leach residues (ZOLR). The effects of different factors involving temperature, drying time, material mass, material thickness and their interaction on moisture content and dehydration rate of ZOLR were investigated. Two second-order polynomial models for moisture content and dehydration rate of ZOLR were established by multivariate regression analysis. Analysis of variance shows that all independent variable and quadratic terms of the four factors have significant influence on moisture content and dehydration rate of ZOLR. The optimum drying conditions are as follows: temperature is 93.41°C, drying time is 15.9 min, sample mass is 77.91 g and material thickness is 17 mm. The predicted values of moisture content and dehydration rate were 10.98% and 1 g/min, which were close to experimental values 11±0.03% and 1±0.01 g/min under the optimal conditions. Infrared spectra analysis show that no chemical reactions took place in the process of microwave dying ZOLR and only a part of the absorbed water was removed in the sample. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|