Methanol Conversion to Light Olefins over SAPO-34. Sorption, Diffusion, and Catalytic Reactions

1999 ◽  
Vol 38 (11) ◽  
pp. 4241-4249 ◽  
Author(s):  
D. Chen ◽  
H. P. Rebo ◽  
K. Moljord ◽  
A. Holmen
Keyword(s):  
Methanol Conversion ◽  
Catalytic Reactions ◽  
Light Olefins

scholarly journals Control of zeolite microenvironment for propene synthesis from methanol

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Longfei Lin ◽  
Mengtian Fan ◽  
Alena M. Sheveleva ◽  
Xue Han ◽  
Zhimou Tang ◽  
...  
Keyword(s):  
Active Sites ◽  
Inelastic Neutron Scattering ◽  
Sustainable Manufacturing ◽  
Methanol Conversion ◽  
Acid Sites ◽  
Light Olefins ◽  
Carbon Bond ◽  
X Ray ◽  
Carbon Carbon Bond ◽  
Catalytic Stability

AbstractOptimising the balance between propene selectivity, propene/ethene ratio and catalytic stability and unravelling the explicit mechanism on formation of the first carbon–carbon bond are challenging goals of great importance in state-of-the-art methanol-to-olefin (MTO) research. We report a strategy to finely control the nature of active sites within the pores of commercial MFI-zeolites by incorporating tantalum(V) and aluminium(III) centres into the framework. The resultant TaAlS-1 zeolite exhibits simultaneously remarkable propene selectivity (51%), propene/ethene ratio (8.3) and catalytic stability (>50 h) at full methanol conversion. In situ synchrotron X-ray powder diffraction, X-ray absorption spectroscopy and inelastic neutron scattering coupled with DFT calculations reveal that the first carbon–carbon bond is formed between an activated methanol molecule and a trimethyloxonium intermediate. The unprecedented cooperativity between tantalum(V) and Brønsted acid sites creates an optimal microenvironment for efficient conversion of methanol and thus greatly promotes the application of zeolites in the sustainable manufacturing of light olefins.

Methanol conversion on silica-aluminas. Production of light olefins

1991 ◽  
Vol 44 (1) ◽  
pp. 133-138
Author(s):  
U. A. Sedran ◽  
N. S. Fígoli
Keyword(s):  
Methanol Conversion ◽  
Light Olefins

Behaviors of coke deposition on SAPO-34 catalyst during methanol conversion to light olefins

2007 ◽  
Vol 88 (5) ◽  
pp. 437-441 ◽  
Author(s):  
Guozhen Qi ◽  
Zaiku Xie ◽  
Weimin Yang ◽  
Siqing Zhong ◽  
Hongxing Liu ◽  
...  
Keyword(s):  
Methanol Conversion ◽  
Coke Deposition ◽  
Light Olefins

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).

Effect of zinc introduction on catalytic performance of ZSM-5 in conversion of methanol to light olefins

2014 ◽  
Vol 68 (9) ◽  
Author(s):  
Su-Hong Zhang ◽  
Zhi-Xian Gao ◽  
Shao-Jun Qing ◽  
Sheng-Yu Liu ◽  
Yan Qiao
Keyword(s):  
Methanol Conversion ◽  
Catalytic Performance ◽  
Light Olefins ◽  
Acidic Property ◽  
X Ray Diffraction ◽  
Light Olefin ◽  
X Ray ◽  
Olefin Conversion ◽  
Methanol To Olefin ◽  
Temperature Programmed

AbstractThe effect of Zn on the catalytic performance of ZSM-5 in the methanol-to-olefin conversion was investigated. The samples were characterised by X-ray diffraction, N2 adsorption, FTIR, temperature-programmed desorption of ammonia and water, and Py-IR. The experimental results revealed Znmodified ZSM-5 to show a lower selectivity to light olefin at the higher reaction temperature of 520°C but a higher selectivity to light olefin at lower temperatures. As a comparison, the catalytic performance of Ca-modified ZSM-5 for the methanol conversion is also given. From the above results, it is concluded that Zn may play another role in the methanol conversion in addition to tuning the surface acidic property after modification.

Kinetic modelling of methanol conversion to light olefins process over silicoaluminophosphate (SAPO-34) catalyst

2016 ◽  
Vol 106 ◽  
pp. 347-355 ◽  
Author(s):  
Reza Bagherian Rostami ◽  
Alireza Samadi Lemraski ◽  
Mohammad Ghavipour ◽  
Reza Mosayyebi Behbahani ◽  
Bahram Hashemi Shahraki ◽  
...  
Keyword(s):  
Kinetic Modelling ◽  
Methanol Conversion ◽  
Light Olefins
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