Zobrazeno 1 - 10
of 218
pro vyhledávání: '"Maria Regina Wolf Maciel"'
Publikováno v:
Chemical Engineering Transactions, Vol 100 (2023)
Molecular distillation is an important separation unit. It operates under low pressure and low temperature, assuring no thermal degradation to the molecules. This is an essential alternative, especially for larger molecules. However, the commercial s
Externí odkaz:
https://doaj.org/article/0c2fca0cc155416880527f316f631299
Publikováno v:
Chemical Engineering Transactions, Vol 100 (2023)
Anhydrous ethanol has several applications in industrial segments, besides being used as an additive to gasoline. Due to the formation of the azeotrope between ethanol and water, complex separation processes must be used to obtain anhydrous ethanol,
Externí odkaz:
https://doaj.org/article/722d59d7412942d4ac439b22b450f632
Autor:
Henrique L. Goncalves, Patricia B.L. Fregolente, Maria Regina Wolf Maciel, Leonardo V. Fregolente
Publikováno v:
Chemical Engineering Transactions, Vol 100 (2023)
The concentration of water above the specification defined by regulatory agencies can impact performance and reliability of the use of fuels (e.g., corrosion and filter clogging), thus separation processes are necessary to reduce or control the water
Externí odkaz:
https://doaj.org/article/7b16933a937f4b4887e34e3c68f61120
Publikováno v:
Chemical Engineering Transactions, Vol 92 (2022)
As biodiesel is basically composed by fatty acid esters that can be methyl or ethyl or propyl or butyl (FAME or FAEE. FAPE or FABE, respectively). Its kinematic viscosity (KV) is usually higher than the fossil diesel. Current diesel vehicle engines a
Externí odkaz:
https://doaj.org/article/ef963e924ade411990f2bc559111069c
Autor:
Rafael E. Umeda, Maria I. R. B. Schiavon, André L.J. Munhoz, Rubens Maciel Filho, Maria Regina Wolf Maciel
Publikováno v:
Chemical Engineering Transactions, Vol 92 (2022)
The pandemic caused by COVID-19 resulted in a significant shortage of personal protective equipment (PPE) and additive manufacturing (AM) has been used to produce masks and face shields quickly and with quality. A widely used input is Nylon 12, a pol
Externí odkaz:
https://doaj.org/article/2b0f263023234ae795ce691349639360
Autor:
Nadia Gagliardi Khouri, Juliana Bahu, Bruna Letícia Carvalho Cunha, Maria Regina Wolf Maciel, Viktor O. Cardenas Concha, Rubens Maciel Filho
Publikováno v:
Chemical Engineering Transactions, Vol 92 (2022)
Lactic acid (LA) can be synthesized via carbohydrate microbial fermentation; such acid is a bifunctional compound containing hydroxyl and carboxylic acid as chemical groups, having optical activity due to an asymmetric carbon in its structure. A comm
Externí odkaz:
https://doaj.org/article/3917743f9c284e59868831a6620d1e3c
Publikováno v:
Chemical Engineering Transactions, Vol 92 (2022)
Biolubricant is a lubricant that can decompose naturally, helping to reduce the number of harmful chemicals such as petrochemical oils released into the environment. This is a promissory product with features similar to mineral oils. Currently, the r
Externí odkaz:
https://doaj.org/article/a650ffe8a7584a71916fb4f23823282a
Publikováno v:
Chemical Engineering Transactions, Vol 92 (2022)
Fuels are contaminated with gases, solvents, dirt, soot, and sealants. Water is always present in biodiesel and high-water content may impact negatively the performance of fuels, such as damaging injection systems and leading up to corrosion of metal
Externí odkaz:
https://doaj.org/article/e57193a95db44a6196029d086e23b6f8
Autor:
Victor Hugo S. Ramos, Nahieh T. Miranda, Betânia H. Lunelli, Leonardo V. Fregolente, Rubens Maciel Filho, Maria Regina Wolf Maciel
Publikováno v:
Chemical Engineering Transactions, Vol 92 (2022)
In this work, diethyl carbonate (DEC) production from CO2 and ethanol, coming from the bioethanol plant, is studied using 2-cyanopyridine (2-CP) as a dehydrating agent and CeO2 as a catalyst. Aiming to integrate existing plants and applying the conce
Externí odkaz:
https://doaj.org/article/e46f8670254848d1b4162487da4837b2
Autor:
Jean Felipe Leal Silva, Emília Savioli Lopes, Anchieta Chayene Gonçalves, Maria Regina Wolf Maciel, Gustavo Doubek, Rubens Maciel Filho
Publikováno v:
Chemical Engineering Transactions, Vol 92 (2022)
Humins are a by-product of the hydrolysis of carbohydrates in the production of levulinic acid. With the development of new large-scale processes to produce levulinic acid, the production of large amounts of this by-product will demand new applicatio
Externí odkaz:
https://doaj.org/article/69eaa3c0be104dc49b4825d11a1749b7