OICC PRESS Experimental and theoretical investigation about the effect of nano-coating on heating load Volume 11 (2020), IJIC Issue 3, September 2020 2023 10 06 Experimental and theoretical investigation about the effect of nano-coating on heating load https://doi.org/10.1007/s40090-020-00209-x EN Sara Farahmand Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran Bizhan Honarvar Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran McKetta Department of Chemical Engineering, University of Texas at Austin, 200 E. Dean Keeton St., Stop C0400, Austin, TX, 78712-1589, USA Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran Dariush Mowla Department of Chemical Engineering, Shiraz University, Shiraz, Iran Gholamreza Karimi Department of Chemical Engineering, Shiraz University, Shiraz, Iran Mansoor Taheri Department of Chemical Engineering, Shiraz University, Shiraz, Iran Journal Article 2023 10 06 Building insulators reducing the natural gas required for interior heating or heating load reduction, have a positive impact on energy saving. Paints containing nano-silica aerogel can be applied as façade coatings and building insulators. In this study, the heating load was assessed for a building in a Mediterranean climate. Acrylic paint containing nano-silica aerogel was used as façade coating. The purpose was obtaining the performance of nano-paint on the reduction of heating load for the building. A model was developed to evaluate the amount of building heating load with and without the nano-paint. Nano-coated façade showed reductions in heating load compared to that façade without nano-coating. In addition, a stable heating load requirement was obtained after applying nano-paint, despite changes in the climatic conditions. Thermal insulation and water repellent properties of the paint containing nano-silica aerogel were important to reduce heating load requirement. Therefore, nano-paint containing silica aerogel was a cost-effective modification for façade which introduced a promising passive method to reduce heating load requirement in the buildings.

OICC PRESS Influence of Fe dopant concentrations on physicochemical and photocatalytic properties of Bi2WO6/CeO2 nanocomposites for rhodamine B degradation Volume 11 (2020), IJIC Issue 3, September 2020 2023 10 06 Influence of Fe dopant concentrations on physicochemical and photocatalytic properties of Bi2WO6/CeO2 nanocomposites for rhodamine B degradation https://doi.org/10.1007/s40090-020-00214-0 EN Natda Wetchakun Program of Physics, Faculty of Science, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, 34000, Thailand Khatcharin Wetchakun Department of Physics and Materials Science, Faculty of Science, Photocatalysts and 2D Materials Research Laboratory, Chiang Mai University, Chiang Mai, 50200, Thailand Sumet Sakulsermsuk Program of Physics, Faculty of Science, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, 34000, Thailand Journal Article 2023 10 06 Fe-doped Bi2WO6/CeO2 nanocomposite materials were prepared by co-precipitation and hydrothermal methods. The physicochemical properties and photocatalytic activities of Bi2WO6/CeO2 nanocomposites after doping with Fe3+ ions were systematically investigated. The 0.2Fe-doped Bi2WO6/CeO2 nanocomposites exhibited the optimal photocatalytic activity in the degradation of rhodamine B (RhB), reaching to 62% degradation after 120 min irradiation, which was 10.3 and 2.7 times higher than CeO2 and Bi2WO6, respectively. The improved photocatalytic activity was mainly ascribed to the enhanced charge carrier separation efficiency of the direct Z-scheme heterojunction system. Moreover, the effective trapping of photogenerated electrons and holes by iron ions inhibits the electron–hole recombination. By a trapping experiment, the main radicals (O2·−) in the photocatalysis experiment were further ascertained. Finally, we proposed the photocatalytic mechanism of Fe-doped Bi2WO6/CeO2 nanocomposite for RhB degradation.

OICC PRESS Potential bleach activators with improved imide hydrolytic stability Volume 11 (2020), IJIC Issue 3, September 2020 2023 10 06 Potential bleach activators with improved imide hydrolytic stability https://doi.org/10.1007/s40090-020-00210-4 EN Ziyuan Song Department of Materials Science and Engineering, University of Illinois At Urbana-Champaign, Urbana, IL, 61801, USA Xue Chen The Dow Chemical Company, Lake Jackson, TX, 77566, USA Zhiyu Wang Department of Materials Science and Engineering, University of Illinois At Urbana-Champaign, Urbana, IL, 61801, USA Steve King The Dow Chemical Company, Lake Jackson, TX, 77566, USA Haoyuan Yan Department of Biochemistry, University of Illinois At Urbana-Champaign, Urbana, IL, 61801, USA Kaimin Cai Department of Materials Science and Engineering, University of Illinois At Urbana-Champaign, Urbana, IL, 61801, USA Jianjun Cheng Department of Materials Science and Engineering, University of Illinois At Urbana-Champaign, Urbana, IL, 61801, USA Journal Article 2023 10 06 The commercially available bleach activator, N,N,N′,N′-tetraacetylethylenediamine (TAED), has been widely used in laundry detergents to enable efficient low-temperature bleaching. However, the competitive hydrolysis of TAED limits its use in liquid detergents. Herein we report the synthesis of two TAED derivatives, N,N,N′,N′-tetracetylpropylene-1,2-diamine (TA(Me)ED) and N,N,N′-triacetylpropylene-1,2-diamine (TriA(Me)ED), through the acetylation of propylene-1,2-diamine. The hydrolytic and perhydrolytic activity of the imide molecules were studied by HPLC to elucidate the structure–function relationship. Due to the increased steric hindrance imparted by the α-methyl group close to the imide, TA(Me)ED and TriA(Me)ED exhibited higher hydrolytic stability than TAED, with the hydrolytic rate constants (kH) at pH 8.0 decreased by 58% and 84% for TA(Me)ED and TriA(Me)ED, respectively. On the other hand, TA(Me)ED and TriA(Me)ED showed comparable perhydrolytic activity with TAED in the presence of peroxide, enabling similar bleaching effect of a model food dye at room temperature. These results suggest these TAED derivatives may have potential being used as improved bleach activators.

OICC PRESS Comparison of near infrared and Raman spectroscopies for determining the cetane index of hydrogenated gas oil Volume 11 (2020), IJIC Issue 3, September 2020 2023 10 06 Comparison of near infrared and Raman spectroscopies for determining the cetane index of hydrogenated gas oil https://doi.org/10.1007/s40090-020-00216-y EN Romana Velvarská UniCRE (Unipetrol Centre for Research and Education, Inc.), Areál Chempark 2838, Záluží 1, Litvínov, 436 70, Czech Republic Marcela Fiedlerová UniCRE (Unipetrol Centre for Research and Education, Inc.), Areál Chempark 2838, Záluží 1, Litvínov, 436 70, Czech Republic David Kadlec UniCRE (Unipetrol Centre for Research and Education, Inc.), Areál Chempark 2838, Záluží 1, Litvínov, 436 70, Czech Republic Kamil Štěpánek UniCRE (Unipetrol Centre for Research and Education, Inc.), Areál Chempark 2838, Záluží 1, Litvínov, 436 70, Czech Republic Journal Article 2023 10 06 The standard method (ISO 4264) for determining the cetane index of hydrogenated gas oil is time-consuming and expensive for routine laboratory tests. Conversely, near infrared (NIR) and Raman spectroscopies are high-speed and cost-effective techniques. In this study, these tools were used to create two models for the determination of the hydrogenated gas oil cetane index. First, ISO 4264 was used to measure the cetane index for 45 real samples used as calibration standards. Then, to create the models, the same samples were measured using NIR and Raman spectroscopies. The model values were then correlated against the ISO values. The Raman model predicted cetane index values with a maximum absolute difference of 1.2 from the ISO, while the NIR model showed a difference of 0.3. Finally, 10 additional real samples were used as validation standards to compare the models. The NIR model predicted values with better cross-validation error and lower absolute differences (NIR 0.334, Raman 0.654) from the ISO values compared to the Raman model. Thus, the NIR model is a fast and accurate method that can partially substitute for ISO 4264 when performing routine laboratory tasks.

OICC PRESS Leaching of a pyrite-based ore containing copper using sulfuric acid and hydrogen peroxide Volume 11 (2020), IJIC Issue 3, September 2020 2023 10 06 Leaching of a pyrite-based ore containing copper using sulfuric acid and hydrogen peroxide https://doi.org/10.1007/s40090-020-00212-2 EN Daniel Salas-Martell Department of Chemical Engineering, Universidad de Ingenieria & Tecnologia - UTEC, Jr. Medrano Silva 165, Barranco, Lima 04, Peru Giuliana Pareja-Guzman Department of Industrial Engineering, Universidad de Ingenieria & Tecnologia - UTEC, Jr. Medrano Silva 165, Barranco, Lima 04, Peru Jimena Tello-Hijar Department of Chemical Engineering, Universidad de Ingenieria & Tecnologia - UTEC, Jr. Medrano Silva 165, Barranco, Lima 04, Peru Juan Carlos F. Rodriguez-Reyes Department of Chemical Engineering, Universidad de Ingenieria & Tecnologia - UTEC, Jr. Medrano Silva 165, Barranco, Lima 04, Peru 0000-0003-2271-4613 Journal Article 2023 10 06 The oxidation of sulfide-based ores is industrially relevant as it facilitates the extraction of valuable metals and eliminates undesired elements from an ore. Even though oxidation can be done thermally (pyrometallurgy), solution-based (hydrometallurgical) methods are currently sought as they represent a more sustainable option. Here, the leaching of a sulfide ore (32% Fe, 2% Cu) is investigated using a mixture of sulfuric acid and hydrogen peroxide (0.15 M H2SO4 and 0.5 M H2O2), in proportions forming a slurry 10% w/w. The leaching process is found to occur in two stages, the first corresponding to an exothermic, peroxide-mediated dissolution, and the second corresponding to an acid-mediated reaction, which appears to be thermoneutral. Control experiments performed with only peroxide confirm that this oxidant is involved in the first stage of the dissolution process. The leaching process leads to copper and iron dissolution (15% and 5%, respectively), as determined using atomic absorption spectrometry (AAS). The mass of pyrite dissolved is estimated from AAS measurements and, from the stoichiometry of the peroxide-mediated dissolution reaction, it is found that ~ 80% of the peroxide participates in the dissolution, with the other 20% being decomposed, in a reaction catalyzed by ferric (Fe+3) ions produced during the first stage of the dissolution.