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Now showing items 21-30 of 43
Pyrolysis of plastic wastes in a fountain confined conical spouted bed reactor: determination of stable operating conditions
(Elsevier, 2020-12-31)
[EN] The performance of both fluidized and spouted bed reactors in the pyrolysis of waste plastics is conditioned by particle agglomeration phenomena, which worsen the quality of the gas-solid contact and eventually lead ...
Enhancing the performance of a PtPd/HY catalyst for HDPE/VGO hydrocracking through zeolite desilication
(Elsevier, 2022-12)
The valorization of post-consumer waste plastic in a refinery is an attractive initiative to avoid environmental problems caused by the poor plastic waste management. The modification of a bifunctional PtPd/HY catalyst ...
Bed symmetry in the fountain confined conical spouted beds with open-sided draft tubes
(Elsevier, 2022-05-13)
Bed symmetry has been analysed in fountain confined conical spouted beds operating with fine particles. Thus, vertical particle velocities and the spout shape have been determined in a wide range of spouting air velocities ...
Alternative acid catalysts for the stable and selective direct conversion of CO2/CO mixtures into light olefins
(Elsevier, 2022-12)
Different acid catalysts (silicoaluminophosphates (SAPOs) -34, −18, and − 11, and HZSM-5 zeolite) were tested as components of In2O3-ZrO2/acid tandem catalysts in the direct synthesis of light olefins by hydrogenation of ...
Hydrogen Pressure as a Key Parameter to Control the Quality of the Naphtha Produced in the Hydrocracking of an HDPE/VGO Blend
(MDPI, 2022-05-16)
The hydrocracking of high-density polyethylene (HDPE) blended with vacuum gas oil (VGO) has been studied to assess the effect of H2 pressure on the yield and composition of the products and with the aim of obtaining ...
Deactivation of Ni spinel derived catalyst during the oxidative steam reforming of raw bio-oil
(Elsevier, 2020-05-12)
Deactivation of a bulk catalyst derived from NiAl2O4 spinel during the oxidative steam reforming (OSR) of raw bio-oil has been studied. The experiments were performed in a continuous system with two units in series: a ...
Co-cracking of high-density polyethylene (HDPE) and vacuum gasoil (VGO) under refinery conditions
(Elsevier B.V., 2020-02)
The co–cracking of a 5 wt% of high–density polyethylene (HDPE) dissolved in vacuum gasoil (VGO) under conditions similar to those of the industrial fluid catalytic cracking (FCC) unit has been studied. The main goal has ...
Kinetic modeling of CO2 + CO hydrogenation to DME over a CuO-ZnO-ZrO2@SAPO-11 core-shell catalyst
(Elsevier, 2020-09-01)
A kinetic model for the CO2 + CO hydrogenation to dimethyl ether (DME) in a single step over an original core-shell structured CuO-ZnO-ZrO2@SAPO-11 bifunctional catalyst (metallic in the core and acid in shell) has been ...
Taking advantage of the excess of thermal naphthas to enhance the quality of FCC unit products
(Elsevier B.V., 2020-09-26)
Today, many European refineries finish up with excess of low-quality thermal naphthas that are hard to be marketed and, commonly, end being absorbed by catalytic naphthas at the expense of their higher quality. In this ...
Macro-kinetic model for CuO-ZnO-ZrO2@SAPO-11 core-shell catalyst in the direct synthesis of DME from CO/CO2
(Elsevier, 2021-01-14)
An original kinetic model has been used to describe the performance of an original CuO-ZnO-ZrO2@SAPO-11 bifunctional catalyst on the one-stage synthesis of dimethyl ether (DME) from CO/CO2 hydrogenation. The model considers ...