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Nature and Location of Carbonaceous Species in a Composite HZSM-5 Zeolite Catalyst during the Conversion of Dimethyl Ether into Light Olefins
(MDPI, 2017-09)
The deactivation of a composite catalyst based on HZSM-5 zeolite (agglomerated in a matrix using boehmite as a binder) has been studied during the transformation of dimethyl ether into light olefins. The location of the ...
Capability of the Direct Dimethyl Ether Synthesis Process for tCapability of the Direct Dimethyl Ether Synthesis Process for the Conversion of Carbon Dioxide
(MDPI, 2018-05)
The direct synthesis of dimethyl ether (DME) is an ideal process to achieve the environmental objective of CO2 conversion together with the economic objective of DME production. The effect of the reaction conditions ...
Catalysts of Ni/α-Al2O3 and Ni/La2O3-αAl2O3 for hydrogen production by steam reforming of bio-oil aqueous fraction
(Elsevier, 2012-12-04)
This paper reports on the steam reforming, in continuous regime, of the aqueous fraction of bio-oil obtained by flash pyrolysis of lignocellulosic biomass (sawdust). The reaction system is provided with two steps in series: ...
A comparative thermodynamic study on the CO2 conversion in the synthesis of methanol and of DME
(Elsevier, 2017-02-01)
A thermodynamic approach of the synthesis processes of methanol and DME from H2+CO+CO2 has been conducted, in order to compare the feasibility of incorporating CO2 in the feed of both processes. The effects of reaction ...
Deactivation kinetics for the conversion of dimethyl ether to olefins over a HZSM-5 zeolite catalyst
(2016-11-16)
A deactivation kinetic equation for the conversion of dimethyl ether (DME) to olefins (DTO process) has been established. The catalyst has been prepared with a HZSM-5 zeolite (SiO2/Al2O3 ratio of 280) agglomerated with ...
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 ...
Kinetic modeling of the direct synthesis of dimethyl ether over a CuO-ZnO-MnO/SAPO-18 catalyst and assessment of the CO2 conversion
(Elsevier, 2018-12-01)
A kinetic model has been established for the direct synthesis of dimethyl ether (DME) from syngas and CO2 feeds. The kinetic parameters have been determined fitting the experimental results obtained using a CuO-ZnO-MnO/SAPO-18 ...
Hydrogen production by steam reforming of bio-oil/bio-ethanol mixtures in a continuous thermal-catalytic process
(Elsevier, 2014-04-24)
The feasibility of the steam reforming of bio-oil aqueous fraction and bio-ethanol mixtures has been studied in a continuous process with two in-line steps: thermal step at 300 ºC (for the controlled deposition of pyrolytic ...
Insight into the deactivation and regeneration of HZSM-5 zeolite catalysts in the conversion of dimethyl ether to olefins
(ACS, 2018-09-19)
The impact of different process variables affecting the coking and rejuvenation of HZSM-5 zeolite catalyst has been studied during the conversion of dimethyl ether (DME) to olefins in a fixed bed reactor. Those variables ...
Upgrading of sewage sludge by demineralization and physical activation with CO2: Application for methylene blue and phenol removal
(2017-09)
Carbon-based adsorbents were prepared by the physical activation of sewage sludge with CO2 through an integrated method (without a precarbonization stage). The activation was conducted at different temperatures (600e1000 ...