Chemical and Biochemical Engineering Quarterly最新文献

Effect of pH on the Phase Equilibrium of a Ternary Mixture of Neopentyl Glycol, Salt, and Water pH值对新戊二醇、盐和水三元混合物相平衡的影响

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2025-01-01 DOI: 10.15255/cabeq.2024.2357

Yanli Zhang, Dachao Li

引用次数: 0

Preparation of Cu-γ-Al2O3 Catalyst and Its Performance in Diphenylmethane Synthesis Cu-γ-Al2O3催化剂的制备及其二苯基甲烷合成性能

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2025-01-01 DOI: 10.15255/cabeq.2024.2375

Ning Liangming, HAN Jingbin, Liu Dongmei, HUANG Zhongdong

{"title":"Preparation of Cu-γ-Al2O3 Catalyst and Its Performance in Diphenylmethane Synthesis","authors":"Ning Liangming, HAN Jingbin, Liu Dongmei, HUANG Zhongdong","doi":"10.15255/cabeq.2024.2375","DOIUrl":"https://doi.org/10.15255/cabeq.2024.2375","url":null,"abstract":"γ-Al2O3 has been widely studied as a very promising catalyst for the benzene alkylation reaction. In this study, the γ-Al2O3 support was prepared by the hydrothermal synthesis method, and the Cu-γ-Al2O3 catalyst was prepared by loading Cu through the impregnation treatment method with copper nitrate. Moreover, the Cu-γ-Al2O3 and γ-Al2O3 catalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), specific surface area measurement (BET), ammonia adsorption-desorption (NH3-TPD), and pyridine infrared spectroscopy (Py-FTIR). The characterization results indicate that, compared with the γ-Al2O3 catalyst, the specific surface area, the pore volume and pore diameter of Cu-γ-Al2O3 become smaller, the total acid amount decreases, the amount of Lewis acid (L acid) increases, and the synergistic effect between Brønsted acid (B acid) and Lewis acid is enhanced. Meanwhile, the cases where the mass ratio of Cu-γ-Al2O3 was 3 %, 5 %, 10 %, and 15 % were investigated. Among these catalysts, the Cu-γ-Al2O3 with a mass ratio of 5% exhibited the highest performance in the benzene alkylation reaction. It is worth noting that compared with the previously reported Cu-Al-MCM-41, this catalyst showed a higher selectivity for diphenyl methane (94.8 % vs. 90.1 %).","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"39 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://doi.org/10.15255/cabeq.2024.2375","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147884711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Reaction Parameters and Feedstock Type on the Synthesis of Fatty Acid Propyl, Butyl, Isobutyl, Pentyl, and Isopentyl Esters 反应参数和原料类型对脂肪酸丙基、丁基、异丁基、戊基和异戊基酯合成的影响

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-10-04 DOI: 10.15255/cabeq.2023.2184

Mia Gotovuša, Ivona Pečurlić, Valentino Petrić, Paula Huzjak, Marta Krasić, Martina Zadravec, Lucija Konjević, Fabio Faraguna

引用次数: 0

Lauric Acid-based Polyol Esters as Potential Bio-based Lubricants for Diesel Fuel 月桂酸多元醇酯作为生物基柴油润滑油的应用前景

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-10-04 DOI: 10.15255/cabeq.2023.2185

Ivan Pucko, Kristina Crnjac, Fabio Faraguna

引用次数: 0

Amoxicillin Biodegradation with Bacillus subtilis and Pseudomonas aeruginosa: Characterization of Relevant Degradation Products 枯草芽孢杆菌和铜绿假单胞菌对阿莫西林的生物降解:相关降解产物的表征

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-10-04 DOI: 10.15255/cabeq.2023.2182

Simona Kovačić, Vilma Lovrinčević, M. Vuković Domanovac, Dragana Vuk

引用次数: 0

Aquatic Toxicity of Polyethylene and Microcrystalline Cellulose Microbeads Used as Abrasives in Cosmetics 化妆品中用作磨料的聚乙烯和微晶纤维素微珠的水生毒性

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-10-04 DOI: 10.15255/cabeq.2023.2181

Martina Miloloža, Ula Rozman, D. Kučić Grgić, Gabriela Kalčikova

{"title":"Aquatic Toxicity of Polyethylene and Microcrystalline Cellulose Microbeads Used as Abrasives in Cosmetics","authors":"Martina Miloloža, Ula Rozman, D. Kučić Grgić, Gabriela Kalčikova","doi":"10.15255/cabeq.2023.2181","DOIUrl":"https://doi.org/10.15255/cabeq.2023.2181","url":null,"abstract":"Microplastics have been part of personal care products for years, but due to micro - plastic pollution, many companies have replaced microplastics with natural particles, such as microcrystalline cellulose. Although natural particles are considered more envi - ronmentally friendly, their ecotoxicological profile is unknown. In this context, the aim of this study was to compare the ecotoxicity of polyethylene and microcrystalline cellu - lose microbeads, both extracted from a cosmetic product. The effects of the two types of particles on the aquatic macrophyte Lemna minor and the crustacean Daphnia magna , as well as the bioadhesion of the particles to Lemna minor were evaluated. The results showed no significant effects of either particle on the specific growth rate, root length, and chlorophyll content of Lemna minor . The bioadhesion of both types of particles to the plant biomass was comparable. Furthermore, no significant effects were observed on the mobility and body length of Daphnia magna . Thus, the investigated polyethylene and cellulose microbeads showed no significant toxic effects on the tested organisms. How - ever, due to the persistence of polyethylene in the environment, the use of polyethylene microbeads in cosmetics and personal care products should be avoided","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135592222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Silver Addition on Cu-based Shape Memory Alloys 添加银对铜基形状记忆合金的影响

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-10-04 DOI: 10.15255/cabeq.2023.2186

L. Liverić, Tamara Holjevac Grgurić, E. Govorčin Bajsić, Marko Kršulja

{"title":"Effect of Silver Addition on Cu-based Shape Memory Alloys","authors":"L. Liverić, Tamara Holjevac Grgurić, E. Govorčin Bajsić, Marko Kršulja","doi":"10.15255/cabeq.2023.2186","DOIUrl":"https://doi.org/10.15255/cabeq.2023.2186","url":null,"abstract":"Shape memory alloys (SMAs) are smart materials with unique properties of super-elasticity and shape memory effect. These properties are the consequence of thermoelastic martensitic transformation, which can occur under thermal or mechanical deformation. Cu-Al-Ag alloys have high temperatures of martensite transformation, unlike other SMAs, which makes them suitable for use in specific applications. In this paper, Cu-10Al-1Ag alloy was prepared by melting pure metals in an electric arc furnace and casting the melt in a cylindrical mold. The microstructure of the as-cast and quenched material was determined by optical microscopy (OM) and scanning electron microscopy (SEM) equipped with energy dispersive analysis (EDS). X-ray diffraction (XRD) analysis was performed to identify crystal phases in the microstructure, while transformation temperatures were determined by differential scanning calorimetry (DSC). The hardness of Cu-Al-Ag SMA was also determined with a microhardness tester. The results showed partially formed martensite in the as-cast state, and fully formed martensite structure, 18R-type, in the quenched Cu-10Al-1Ag alloy.","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135592214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of Sol-gel Derived Cobalt-doped Willemite via 2D Correlation Spectroscopy 溶胶-凝胶衍生钴掺杂Willemite的二维相关光谱表征

4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-10-04 DOI: 10.15255/cabeq.2023.2189

Filip Brleković, Katarina Mužina, Sanislav Kurajica

{"title":"Characterization of Sol-gel Derived Cobalt-doped Willemite via 2D Correlation Spectroscopy","authors":"Filip Brleković, Katarina Mužina, Sanislav Kurajica","doi":"10.15255/cabeq.2023.2189","DOIUrl":"https://doi.org/10.15255/cabeq.2023.2189","url":null,"abstract":"Cobalt blue is one of the world’s most famous blue pigments, but it presents a threat to human health since it is toxic when inhaled or ingested. A safer and environmentally preferable way of obtaining cobalt blue-like pigments is doping of various nontoxic compounds with small amounts of cobalt. In this work, doping of zinc silicate (willemite, Zn 2 SiO 4 ) was carried out with 5, 10, and 15 mol% of Co with the aim of obtaining Zn 2– x Co x SiO 4 solid solution. Thermal properties of sol-gel derived samples were examined with simultaneous differential thermal and thermogravimetric analysis (DTA/TGA), which showed dehydration, decomposition, and burning effects, accompanied with mass loss and willemite crystallization effect at 800 °C. X-ray powder diffraction analysis (XRD) indicated the formation of willemite phase at 800 °C, accompanied with ZnO phase and increase in willemite crystallinity with annealing temperature rise from 800 to 1100 °C. Fourier transform infrared spectroscopy (FTIR) showed characteristic bands for present oxides and their bonds along with adsorbed water and carbon dioxide. Coloura-tion of prepared samples changed with annealing temperature, whereas higher Co concentrations and temperatures accentuated the intense blue colour. Diffuse reflectance spectroscopy (DRS) revealed an increase in absorbance with annealing temperature and specific bands as a result of different Co coordination present in the samples. The 2D correlation analysis of FTIR and UV-Vis spectra of the samples thermally treated at various temperatures was utilized to investigate and correlate the changes in the structure with the rise of the annealing temperature. The obtained correlation facilitated the finding of optimal process parameters for the desired pigment quality","PeriodicalId":9765,"journal":{"name":"Chemical and Biochemical Engineering Quarterly","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135592714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Converting Waste into Products and Energy Using Complete Circular Economy and the Hydrogen Effect Technique to Reduce Dependence on Natural Gas 利用完全循环经济和氢效应技术将废物转化为产品和能源，减少对天然气的依赖

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-07-03 DOI: 10.15255/cabeq.2022.2157

A. Kovač Kralj

引用次数: 0

Effect of Process Parameters on Chitosan-mediated Microalgae Flocculation 工艺参数对壳聚糖介导微藻絮凝的影响

IF 1.5 4区生物学

Chemical and Biochemical Engineering Quarterly Pub Date : 2023-07-03 DOI: 10.15255/cabeq.2022.2152

S. Akiş, B. Inan, D. Özçimen

引用次数: 0