Resumo (PT):
Abstract (EN):
This work compares the hydrogen purity and recovery produced by a methanol steam reforming (MSR)
packed bed membrane reactor (PBMR) equipped with a membrane selective to hydrogen (Pd-Ag) and
with a membrane selective to carbon dioxide (porous membrane filled with ionic liquids-ILs). A 3-
dimensional non-isothermal PBMR model was developed in Fluent (AnsysTM) for simulating a PBMR
equipped with these two types of membranes and simulating a conventional packed bed reactor (PBR).
For the development PBMR models a MSR mechanistic kinetic model was fitted to experimental reaction
rates of a commercial catalyst (BASF RP60). The results indicated that selective hydrogen removal from
the reaction medium originates a significant increase in the methanol conversion, while the carbon dioxide removal has a smaller effect. CO2-PBMR showed to be more efficient in terms of energy consumption
than H2-PMBR. The simulation results showed also that ILs membranes must have a minimum permeance of P1 x 106 mol s1 m2 Pa1 and CO2/H2 selectivity of P200 at 473 K to be attractive for this type
of applications. The advantages and limitations of each reactor configuration are discussed based on
experimental and simulated data.
Idioma:
Inglês
Tipo (Avaliação Docente):
Científica
Nº de páginas:
11