Petroleo Brasileiro S.a. - Petrobras

Universidade Federal De Minas Gerais - Ufmg

Universidade Federal Do Rio De Janeiro - Ufrj

Statoil Brasil Oleo E Gas Ltda

Universidade Estatual De Maringá

Jailton Ferreira Do Nascimento

Wander Luiz Vasconcelos

Daniela Cordeiro Leite Vasconcelos

Wilson Mantovani Grava

Peter Wilhelmus Jacques Derks

Eduardo Henrique Martins Nunes

Douglas Fernandes De Souza

Cristina Cardoso Pereira

Cristiano Piacsek Borges

Pedro Augusto Arroyo

Artur Lemes Moretti

Leonardo Hadlich De Oliveira

Fernando Franco Queiroz

João Lourenço Castagnari William Pimenta

Leonardo Brunelli Do Nascimento

Amanda Gerhardt De Oliveira Ferreira

Carla Luciane Manske Camargo

Neuman Solange De Resende

Vera Maria Martins Salim

Débora Guimarães Da Silva

Priscila Cristh Fonseca Alves

Alan Marcos Da Silva Reis

Mariana Arruda Pereira

Jéssica De Oliveira Notório Ribeiro

Fernando Gusman Brandao

The present invention addresses to the use of NaY zeolite with a Si/Al ratio>2.6 as a solid adsorbent in the process of removing HS from natural gas through a PSA process. The described adsorbent has the capacity of removing HS from natural gas from offshore exploration platforms, enabling in situ regeneration. The experimental development proved the high capacity of capturing HS by the NaY zeolite in consecutive cycles of pressurization, adsorption, depressurization and purging. This capture capacity remains at 74.2% of the initial capacity, remaining stable in subsequent cycles. The structure of the material maintained crystallinity above 95% in use, in 15 consecutive cycles, allowing the reuse of the adsorbent for a prolonged period of operation, preventing the solid from being constantly changed, which is quite common in a non-regenerative process.

Process for the removal of HS from natural gas at high pressures by means of a PSA process

The present invention relates to a geopolymer produced from a synthetic aluminosilicate. The synthetic aluminosilicate was produced by sol gel technology, heat treated and, later, activated using sodium silicate and sodium hydroxide in solution, having as a final product a synthetic geopolymer. The final product was submitted to COadsorption analysis using thermogravimetry for adsorbed quantification. In addition to the pure geopolymer, it is also possible to produce the synthetic geopolymer with the addition of surfactant, or in the composite form with the addition of zeolite, or heat treated to form a zeolite or functionalized with amine, for example, to increase the adsorption capacity.

Process for obtaining synthetic geopolymers and synthetic geopolymers

Provided is a mold cooling system for the manufacturing of ceramic parts by freeze-casting including: a source () of cooling gas; a cooling gas cooling medium () fluidically connected to the cooling gas source (); and a cooling cell (), fluidly connected to the cooling gas cooling medium (), including a mold () in its interior, wherein the cooling cell () includes a refrigerated cooling gas injection opening. Thus, a mold cooling system is provided for the manufacturing of ceramic parts by freeze-casting including the stages of: refrigerating a cooling gas coming from a cooling gas source (); and injecting a cooling gas that is refrigerated in a cooling cell () including a mold () in its interior.

De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freezing-casting

A linear actuator is used to remove solid-state parts in low-temperature condition from the containers used as a mold for manufacturing parts using freeze-casting. The device allows pressure to be applied to the material to be removed, resulting in ejection. The displacement of the material is performed with controlled displacement speed, providing the achievement of defect-free materials. The system performing the ejection includes a source of compressed air, a pressure regulator filter coupled with a manometer, a directional valve, the linear actuator, a baton, a flow regulating valve, a fastening means, a metallic support and a chamber for receiving the cooled material.

System for demolding materials obtained by means of the freeze-casting technique

The present invention deals with a method for obtaining membranes in the form of hollow fibers with application in the field of carbon dioxide removal from natural gas. The aforementioned membranes are obtained by means of heat treatment of polymeric membranes. In this method, polymeric membranes are obtained by a phase-inversion technique by immersion-precipitation and are subsequently subjected to a heat treatment, that is, that the membranes effectively become precursor membranes of the heat treatment. The heat treatment process involves the optimization of the heating rate, temperature, and stabilization time variables, aiming at the improvement of the transport properties of the polymeric membranes. After the heat treatment, it becomes possible to use the membranes in separation processes of gases which operate at pressures greater than 30 bar, with selectivity for carbon dioxide (CO).

Membranes in the form of hollow fibers for the separation of COfrom natural gas and method of preparation by heat treatment and development of a polymeric membrane precursor

The present invention addresses to a device that allows the control of the gas pressure at the outlet of a fixed bed adsorption equipment operated at high pressures, by means of the actuation of a micrometric valve (), wherein the valve must be located downstream of the equipment. The valve actuation takes place by means of a stepper motor (), controlled by a microcontroller board (), which connects to the valve shaft by means of a system of pulleys () and belt (). The present invention is applied in adsorption units, in which other gases are present, by altering the tuning parameters of the PID controller or even being used in a liquid medium or gas-liquid two-phase flow.

Micrometric valve actuator device for gas pressure control

The present invention is in relation to a process for preparing calcium phosphate-based sulfated adsorbents that capture mercury in gas streams, comprised of the steps of synthesis of the precursors, incorporation of a transition metal, and sulfation of the material. These adsorbents present high efficiency both for removal of low concentrations of mercury, such as in natural gas, and for stabilization of this pollutant. The adsorbents obtained in the invention may be used in the Mercury Removal Units (MRUs) present in natural gas processing plants, which mercury removal units may be located either upstream or downstream of the dehydration and HS removal units, due to the adsorbents obtained showing resistance to HS poisoning, and maintaining their performance in the presence of water.

Process for preparing sulfated adsorbents, sulfated adsorbents and use

This invention provides a de-molding system of ceramic parts manufactured by freeze-casting comprising a mold (), wherein the mold () comprises an upper opening () and a lower opening (), wherein the upper opening () is adapted to receive a colloidal suspension (), and one of the openings is adapted to allow the passage of a manufactured ceramic part (), characterized by comprising at least one main de-molding element () adapted to actuate a ceramic part manufactured () through an opening in the mold (). In addition, the invention provides a mold cooling system for the manufacturing of ceramic parts by freeze-casting comprising: a source () of cooling gas; a cooling gas cooling medium () fluidically connected to the cooling gas source (); and a cooling cell (), fluidly connected to the cooling gas cooling medium (), comprising a mold () in its interior, wherein the cooling cell () comprises a refrigerated cooling gas injection opening. Thus, a mold cooling system is provided for the manufacturing of ceramic parts by freeze-casting comprising the stages of: refrigerating a cooling gas coming from a cooling gas source (); and injecting a cooling gas that is refrigerated in a cooling cell () comprising a mold () in its interior.

De-molding system of ceramic parts manufactured by freeze-casting, and mold cooling system and method for manufacturing ceramic parts by freeze-casting

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Rio de Janeiro, Brazil

Jailton Ferreira Do Nascimento