一家公立医院的清洁人员在 COVID-19 大流行期间的应对措施

IF 3.2 2区哲学 Q1 EDUCATION & EDUCATIONAL RESEARCH Minerva Pub Date : 2023-12-10 DOI:10.47460/minerva.v2023ispecial.144

Hector M. Mendoza Bustamante, Segundo Alcides García M., Ramón E. Cevallos Cedeno, Gonzalo Oswaldo García Vinces

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引用次数: 0

摘要

与 Na(OH) 和 Ca(OH)2.GR 等催化剂相比，本研究旨在评估从蛋壳中提取的 Ca(OH)2 作为催化剂在第一代油的酯交换反应中的有效性。蛋壳在马弗炉中进行热处理，温度间隔将 CaCO3 还原成 CaO。获得氧化钙后，将其与蒸馏水混合，由于 CaO 转化产生 Ca(OH)2 的放热反应，蒸馏水会随着时间的推移而蒸发。结果表明，Ca(OH)2.GR 比从蛋壳中获得的 Ca(OH)2 更有效，而 Na(OH) 则优于研究中使用的其他催化剂。

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Coping during the COVID-19 pandemic in the cleaning staff of a public hospital

The present work aimed to evaluate the effectiveness of Ca(OH)2 obtained from eggshells as a catalyst in the transesterification of first-generation oil compared to catalysts such as Na(OH) and Ca(OH)2.GR. The eggshells were subjected to thermal treatment in a muffle furnace with temperature intervals to reduce CaCO3 to CaO. Once the calcium oxide was obtained, it was mixed with distilled water, which evaporated over time due to the exothermic reaction of CaO conversion to produce Ca(OH)2. The results showed that Ca(OH)2.GR has greater efficacy than Ca(OH)2 obtained from eggshells, while Na(OH) proved superior to the other catalysts used in the study

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来源期刊

Minerva Multiple-

CiteScore

5.20

自引率

4.30%

发文量

期刊介绍： Minerva is devoted to the study of ideas, traditions, cultures and institutions in science, higher education and research. It is concerned no less with history than with present practice, and with the local as well as the global. It speaks to the scholar, the teacher, the policy-maker and the administrator. It features articles, essay reviews and ''special'' issues on themes of topical importance. It represents no single school of thought, but welcomes diversity, within the rules of rational discourse. Its contributions are peer-reviewed. Its audience is world-wide.