MESOPOROUS ALUMINOSILICATE SUPPORTED CATALYSTS IN ALTERNATIVE FUEL HYDROGEN PRODUCTION

Metal supported catalysts in hydrogen production reactor has a very broad application prospect. However, the film adhesion of active coating with the metal support is the key problem which needed to be solved urgently. In this paper, FeCrAl alloy was chosen as the metallic substrate. The effects of oxidation temperature and time on the morphology, crystal phase and element composition of the metal surface were investigated by XRD, SEM and EDAX. The results show that after pre-treatment of FeCrAl Metallic Substrate,a dense transition layer of α-Al2O3 formed on the surface of the metallic support. Thus the oxidized α-Al2O3 layer and the γ-Al2O3 coating could combine together better. The optimum pre-treatment condition is at 950°C for 10h in air atmosphere.

Download Full-text

Hydrogen production from simple alkanes and oxygenated hydrocarbons over ceria–zirconia supported catalysts: Review

Renewable and Sustainable Energy Reviews ◽

10.1016/j.rser.2013.12.040 ◽

2014 ◽

Vol 32 ◽

pp. 777-796 ◽

Cited By ~ 77

Author(s):

Gaurav Nahar ◽

Valerie Dupont

Keyword(s):

Hydrogen Production ◽

Supported Catalysts ◽

Oxygenated Hydrocarbons

Download Full-text

Synthesis and Catalytic Applications of Novel Mesoporous Aluminosilicate Molecular Sieves

MRS Proceedings ◽

10.1557/proc-454-125 ◽

1996 ◽

Vol 454 ◽

Cited By ~ 8

Author(s):

Kondam Madhusudan Reddy ◽

Chunshan Song

Keyword(s):

Molecular Sieves ◽

Supported Catalysts ◽

Metal Sulfide ◽

Sodium Aluminate ◽

Mesoporous Molecular Sieve ◽

Mesoporous Molecular Sieves ◽

Hydrogenation Catalysts ◽

Mesoporous Aluminosilicate ◽

Catalytic Applications ◽

Mcm 41

ABSTRACTThis paper reports on the synthesis of four series of mesoporous aluminosilicate molecular sieves (Al-MCM-41) and their catalytic applications. Four different aluminum compounds were examined as Al source in the hydrothermal synthesis of the mesoporous aluminosilicates of MCM-41 type, including pseudo boehmite (alumina), aluminum sulfate, aluminum isopropoxide, and sodium aluminate. Each Al source was examined at three different feed Si/Al ratios in the synthesis. XRD results show that there are differences in the dioo-spacings for the samples prepared with different Al sources: sodium aluminate > Al isopropoxide > Al sulfate > pseudo boehmite. Such differences reveal that Al incorporation in the framework increases in the following order: pseudo boehmite < Al sulfate < Al isopropoxide < sodium aluminate. XRD also indicates that the synthesized Al-MCM-41 samples have different crystallinity. 27Al NMR and 29Si NMR reveal that most of the Al species in the samples prepared with pseudo boehmite were present in octahedral coordination, whereas in other samples nearly all the Al species are tetrahedral (in the framework). The acid characteristics of the synthesized molecular sieves were characterized by temperature-programmed desorption of n-butylamine, and by using 1,3,5-triisopropylbenzene hydrocracking as probe reaction. The results of TPD and probe reaction clearly indicate that the Al source used for synthesis has a major impact on the acidic and catalytic properties of Al-MCM-41. The samples prepared with Al isopropoxide and sodium aluminate are better as catalysts than those with Al sulfate and pseudo boehmite. We also explored the potential of mesoporous molecular sieves as support for noble metal hydrogenation catalysts and metal sulfide-based hydrotreating catalysts. Pd and Pt-loaded mesoporous molecular sieves were prepared and applied for hydrogenation of naphthalene and phenanthrene. The results show that mesoporous molecular sieve-supported catalysts are much more active than alumina- and titania-supported catalysts. The data for dibenzothiophene hydrodesulfurization suggest that Al-MCM-41 supported Co-Mo may be effective for deep desulfurization of distillate fuels.

Download Full-text

Simulasi produksi hidrogen melalui CO2 methane reforming pada reaktor membran

Jurnal Teknik Kimia Indonesia ◽

10.5614/jtki.2007.6.3.2 ◽

2018 ◽

Vol 6 (3) ◽

pp. 666

Author(s):

Azis Trianto ◽

Ira Santrina J C ◽

Susilo Yuwono

Keyword(s):

Hydrogen Production ◽

Membrane Reactor ◽

Fixed Bed ◽

Environmentally Friendly ◽

Alternative Fuel ◽

Membrane Reactors ◽

Fixed Bed Reactor ◽

Methane Reforming ◽

Generation System ◽

Promising Alternative

Hydrogen is a promising alternative fuel to establish environmentally friendly energy generation system. One of the methods for producing hydrogen is C02 methane reforming (CMR) process. Despite producing H2, this process also consumes CO2 enabling it to be used as a scheme for mitigating CO2. Conventionally, the hydrogen production via CMR is conducted in a fixed bed reactor. However low conversion is usually found in this kind of reactor. To increase conversion, a membrane reactor can be used. Two types of membrane may be employed to conduct this reaction, i.e. prorous vycor and nanosil membrane reactor. This study evaluated the performances of CMR con 1ucted in membrane ractors andfixed-bed reactor. The results show that the conversion obtained in nanosil membrane reactor is higher than those obtained in porous vycor membrane reactor and fixed-bed reactor. With the change in reactant flowrate, it is obtained that the conversions in membrane reactors are more stable than those infixed bed reactors.Keywords: Hydrogen Production, Membrane Reactor, Methane Reforming AbstrakHidrogen merupakan bahan bakar alternatif yang sangat menjanjikan untuk sistem pembangkitan energi yang lebih ramah lingkungan. Salah satu rute produksi hidrogen adalah melalui reformasi metana dengan karbondioksida (C02 Methane Reforming/CMR). Saat ini telah dikembangkan proses CMR menggunakan membran yang mampu meningkatkan laju produksi H2• Pada makalah ini dikaji dua tipe reaktor membran untuk maksud peningkatan produksi hidrogen tersebut, yakni reaktor membran dengan basis membran porous vycor dan nanosil. Sebagai pembanding, dilakukanjuga evaluasi unjuk kerja reaksi CMRpada reaktorfzxe-bed. Hasil kajian ini menurljukkan bahwa reaktor nanosil danporous vycor mampu memberikan konversiyang lebih besar dibanding reaktor fixed-bed. Lebihjauh, reaktor membran dengan nanosil membran mampu memberikan laju produksi hidrogen yang lebih tinggi dibanding reaktor membran dengan membran porous vycor. Lebih jauh, pada perubahan laju molar reaktan, reaktor membran menurijukkan stabilitas yang lebih baik dibanding reaktor fixed-bed.Kata Kunci: Produksi Hidrogen, Reaktor Membran, Reformasi Metana

Download Full-text