Boosting Dimethylamine Formation Selectivity in a Membrane Reactor by In Situ Water Removal

2021 ◽  
Author(s):  
Felix Rieck genannt Best ◽  
Alexander Mundstock ◽  
Patrick A. Kißling ◽  
Hannes Richter ◽  
Karen D. J. Hindricks ◽  
...  
Keyword(s):  
Membrane Reactor ◽  
Water Removal ◽  
Formation Selectivity

scholarly journals Understanding the Impact of Hydrogen Activation by SrCe0.8Zr0.2O3−δ Perovskite Membrane Material on Direct Non-Oxidative Methane Conversion

2022 ◽  
Vol 9 ◽  
Author(s):  
Sichao Cheng ◽  
Su Cheun Oh ◽  
Mann Sakbodin ◽  
Limei Qiu ◽  
Yuxia Diao ◽  
...  
Keyword(s):  
Methane Conversion ◽  
Membrane Reactor ◽  
Membrane Reactors ◽  
Fixed Bed Reactor ◽  
Perovskite Oxide ◽  
Oxide Material ◽  
Hydrogen Activation ◽  
Permeable Membrane ◽  
The Impact

Direct non-oxidative methane conversion (DNMC) converts methane (CH4) in one step to olefin and aromatic hydrocarbons and hydrogen (H2) co-product. Membrane reactors comprising methane activation catalysts and H2-permeable membranes can enhance methane conversion by in situ H2 removal via Le Chatelier's principle. Rigorous description of H2 kinetic effects on both membrane and catalyst materials in the membrane reactor, however, has been rarely studied. In this work, we report the impact of hydrogen activation by hydrogen-permeable SrCe0.8Zr0.2O3−δ (SCZO) perovskite oxide material on DNMC over an iron/silica catalyst. The SCZO oxide has mixed ionic and electronic conductivity and is capable of H2 activation into protons and electrons for H2 permeation. In the fixed-bed reactor packed with a mixture of SCZO oxide and iron/silica catalyst, stable and high methane conversion and low coke selectivity in DNMC was achieved by co-feeding of H2 in methane stream. The characterizations show that SCZO activates H2 to favor “soft coke” formation on the catalyst. The SCZO could absorb H2in situ to lower its local concentration to mitigate the reverse reaction of DNMC in the tested conditions. The co-existence of H2 co-feed, SCZO oxide, and DNMC catalyst in the present study mimics the conditions of DNMC in the H2-permeable SCZO membrane reactor. The findings in this work offer the mechanistic understanding of and guidance for the design of H2-permeable membrane reactors for DNMC and other alkane dehydrogenation reactions.

Simultaneous CO2 and O2 separation coupled to oxy-dry reforming of CH4 by means of a ceramic-carbonate membrane reactor for in situ syngas production

2019 ◽  
Vol 210 ◽  
pp. 115250 ◽  
Author(s):  
J.A. Fabián-Anguiano ◽  
C.G. Mendoza-Serrato ◽  
C. Gómez-Yáñez ◽  
B. Zeifert ◽  
Xiaoli Ma ◽  
...  
Keyword(s):  
Membrane Reactor ◽  
Dry Reforming ◽  
Syngas Production

CO2 methanation combined with NH3 decomposition by in situ H2 separation using a Pd membrane reactor

2014 ◽  
Vol 39 (19) ◽  
pp. 10154-10160 ◽  
Author(s):  
Manabu Miyamoto ◽  
Risa Hayakawa ◽  
Yasutaka Makino ◽  
Yasuhiro Oumi ◽  
Shigeyuki Uemiya ◽  
...  
Keyword(s):  
Membrane Reactor ◽  
Co2 Methanation ◽  
Pd Membrane ◽  
Nh3 Decomposition

Regeneration of photocatalysts by in situ UV irradiation in photocatalytic membrane reactor

2016 ◽  
Vol 89 (1) ◽  
pp. 94-98 ◽  
Author(s):  
Xiaoju Yan ◽  
Xiangyanga Xu ◽  
Jun Liu ◽  
Ruiling Bao ◽  
Lizheng Li
Keyword(s):  
Uv Irradiation ◽  
Membrane Reactor ◽  
Photocatalytic Membrane Reactor

Dehydration of saccharides to anhydro-sugars in dioxane: effect of reactants, acidic strength and water removal in situ

Cellulose ◽  
2020 ◽  
Vol 27 (17) ◽  
pp. 9825-9838
Author(s):  
Qi Cao ◽  
Tian Ye ◽  
Wenhui Li ◽  
Jiao Chen ◽  
Yanyu Lu ◽  
...  
Keyword(s):  
Water Removal

CFD modeling of methanol to light olefins process in a sodalite membrane reactor on SAPO-34 catalyst with in situ steam removal

2020 ◽  
Vol 23 ◽  
Author(s):  
Abbas Aghaeinejad-Meybodi ◽  
Seyed Mahdi Mousavi ◽  
Ali Asghar Shahabi ◽  
Mohammad Rostampour Kakroudi
Keyword(s):  
Membrane Reactor ◽  
Fixed Bed ◽  
Methanol Conversion ◽  
Fixed Bed Reactor ◽  
Light Olefins ◽  
Cfd Modeling ◽  
Cfd Model ◽  
Ethylene Propylene ◽  
Mto Process

Aims and Objective: In this work, the performance of sodalite membrane reactor (MR) in methanol to olefins (MTO) process was evaluated for ethylene and propylene production with in situ steam removal using 3-dimensional CFD (computational fluid dynamic) technique. Methods: The local information of component concentration for methanol, ethylene, propylene, and water was obtained by the proposed CFD model. Literature data were applied to validate model results, and between experimental data and predicted results using CFD model, a good agreement was attained. In the sodalite MR model, a commercial SAPO-34 catalyst in the reaction zone was selected. The influence of key operation parameters including pressure and temperature on methanol con-version, water recovery, and yields of ethylene, propylene, and water was studied to evaluate the performance of sodalite MR. Permeation flux through the sodalite membrane was increased by an increase of reaction temperature which led to enhance-ment of water stream recovered in the permeate side. Result and Conclusion: The CFD modeling results showed that the sodalite MR in MTO process has higher performance regarding methanol conversion compared to the fixed-bed reactor (methanol conversion of 97% and 89% at 733 K for sodalite MR and fixed-bed reactor, respectively).

Sign in / Sign up

Export Citation Format

Share Document