| Autor: |
Abib GAP; Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Engenharia e Exploração de Petróleo, Rodovia Amaral Peixoto, Km 13, Av. Brenand, s/n, Imboacica, 27925-535 Macaé, RJ, Brazil., Martins LL; Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Engenharia e Exploração de Petróleo, Rodovia Amaral Peixoto, Km 13, Av. Brenand, s/n, Imboacica, 27925-535 Macaé, RJ, Brazil., Araujo LLGC; Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Engenharia e Exploração de Petróleo, Rodovia Amaral Peixoto, Km 13, Av. Brenand, s/n, Imboacica, 27925-535 Macaé, RJ, Brazil.; Universidade Federal do Rio de Janeiro, Instituto de Química, Polo de Xistoquímica, Rua Helio de Almeida, 40, Cidade Universitária, 21941-614 Rio de Janeiro, RJ, Brazil., Isidorio TV; Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Engenharia e Exploração de Petróleo, Rodovia Amaral Peixoto, Km 13, Av. Brenand, s/n, Imboacica, 27925-535 Macaé, RJ, Brazil., Pudenzi MA; Universidade de Campinas, Instituto de Química, Rua Josué de Castro, s/n, Cidade Universitária, 13083-970 Campinas, SP, Brazil., Santos VH; Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Engenharia e Exploração de Petróleo, Rodovia Amaral Peixoto, Km 13, Av. Brenand, s/n, Imboacica, 27925-535 Macaé, RJ, Brazil., Cruz GFD; Universidade Estadual do Norte Fluminense Darcy Ribeiro, Laboratório de Engenharia e Exploração de Petróleo, Rodovia Amaral Peixoto, Km 13, Av. Brenand, s/n, Imboacica, 27925-535 Macaé, RJ, Brazil. |
| Abstrakt: |
The presence of acidic compounds as naphthenic acids in crude oil causes several problems for the petroleum industry, including corrosion in both upstream and downstream production processes. Based on this scenario, the main objective of this work was to investigate the removal of the acidic compound from two Brazilian heavy oils by adsorption processes using six potential adsorbents: powdered shale, activated carbon, bentonite, silica gel, powdered sandstone and powdered wood. These raw materials were previously characterized by conventional and surface analysis techniques, which show that they offer a good surface area and thermal stability. To evaluate the removal efficiency at the molecular level, the crude oil samples and the filtered oils were analyzed by negative electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry [ESI (-) FTICR MS]. The O2 class, which is related to the relatively high acidity of the samples, was the most abundant in both crude oil samples, moreover, this class was more retained by adsorbents. Silica gel, activated carbon and bentonite were the best adsorbents of acidic compounds from the tested oils, in agreement with their markedly higher surface area and porous volume. Additionally, a chromatographic analysis was performed and showed no changes in the oil profile. |
