No abstract

This article presents the experimental data on distillation of bio-oil obtained from thermal cracking of a mixture of castor oil and its methyl esters. The interpretation of the data can be found in Menshhein et al. (2019) available on https://doi.org/10.1016/j.renene.2019.04.136. Experiments were carried out using a simple distillation apparatus and the products were quantified and qualified from Gas Chromatography – Flame Ionization Detector (GC-FID) with standards compounds. Data were presented in terms of distillation equipment and distillation curve values of volume and temperature of the crude bio-oil sample. Information about GC-FID methods and chromatograms of from standard heptaldehyde and methyl undecenoate and their analytical curve. Carbon number data of crude bio-oil sample was also showed.

This work evaluated the process for heptaldehyde, undecylenic acid and methyl undecenoate production from castor oil, methyl ester of castor oil and ricinoleic acid. Experiments were performed in a continuous pilot-plant scale pyrolysis reactor. Those are very important green chemical products that might be obtained by the thermal cracking of castor oil. Transesterification of castor oil produces methyl ricinoleate and its thermal cracking generates methyl undecenoate and heptaldehyde. The pyrolysis temperatures tested were 530, 545, 560, and 575 ?C, with residence time from 17 to 32 s and mass flow at 400 g/h of the mixture of materials with 25% distilled water. It was observed that the temperature influence in relation to bio-oil generated and their differences for each material. The bio-oil was characterized by iodine index, acid number, mass, and the contents of its compounds were obtained by GC-FID chromatography. The best result for the undecylenic acid mass yield of the desired compounds occurred at 530?C, achieving 17.8 % from ricinoleic acid and 16.5% from castor oil. For the heptaldehyde the highest production was also obtained at 530 ?C, with a value of 20.7% from methyl ester and 15.2% from ricinoleic acid.

A pesquisa originou-se a partir das experiências no ensino remoto para a EJA em uma escola estadual no município de Barra do Garças/MT. O problema da pesquisa foi: como os estudantes-trabalhadores da EJA lidam com as aulas remotas por meio das tecnologias de informação e comunicação? O objetivo da investigação foi refletir sobre as contribuições que o ensino remoto traz aos estudantes-trabalhadores da EJA. Baseamo-nos nos escritos de Kenski, 2003;Souza, 2020;Paiva, 1973. Os resultados demonstram que os estudantes-trabalhadores veem de forma positiva o ensino remoto e as aulas virtuais. Nossas considerações, não conclusivas, abre-nos à possibilidade de discussões sobre uma nova forma de ofertar a EJA no Estado do Mato Grosso que é a EJA EaD, que nos últimos anos vem sendo defendida por governantes como uma possibilidade ao atendimento às especificidades da EJA no estado.