DME production by CO2 hydrogenation: Key factors affecting the behaviour of CuZnZr/ferrierite catalysts

Bonura, Giuseppe; Cannilla, C.; Frusteri, Leone; Mezzapica, A.; Frusteri, F.

doi:10.1016/j.cattod.2016.05.057

Cited by 84 publications

(63 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As with methanol production in the indirect process, CO 2 conversion increases from 195°C to 213°C due to the increased reaction rate [48], reaching a maximum value of 0.11 at a temperature of 213°C. Afterward, the CO 2 conversion decreases up to 366°C due to thermodynamic equilibrium limitation at higher temperatures [43,44]. Meanwhile, CO 2 conversion in the direct process increases from temperatures of 195°C, reaching a maximum value of 0.13. e increase is due to the kinetic preference of methanol formation (see (2)) and DME formation (see (1)) by consuming methanol formed.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, with the increase in the reactor temperature, methanol starts to form at 204°C and continue to increase until it reaches its peak at a temperature of around 213°C due to the enhancement of the reaction rate of methanol formation (see (2)) [42]. Afterward, methanol production decreases with increasing reactor temperature up to 366°C as the maximum temperature for thermodynamic equilibrium has been achieved [43,44] and in the temperature range of 213-366°C the reverse water gas shift reaction (see (4)), which is endothermic, could be preferred compared to CO 2 hydrogenation reaction (see (2)) [42]. us, the methanol reactor temperature of 213°C in the indirect process is the optimum temperature where there is a balance between kinetic and thermodynamic constraints [45].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

Kartohardjono

Adji

Muharam

2020

International Journal of Chemical Engineering

View full text Add to dashboard Cite

Increase in the world energy demand also increases the concentration of CO2 in the atmosphere, which contributes to global warming and ocean acidification. This study proposed the simulation process to utilize CO2 released from the acid gas removal unit in one of gas processing plants in Indonesia to enhance the production of dimethyl ether (DME) through unreacted gas recycle that can be beneficial in reducing CO2 emission to the atmosphere. Simulation was developed in Unisim R390.1 using Peng–Robinson–Stryjek–Vera (PRSV) as a fluid package. Simulation was validated by several studies conducted by many researchers and giving satisfactory results especially in terms of productivity, conversion, and selectivity as a function of reactor temperatures in the indirect and the direct DME synthesis processes. Simulation results show that the DME production was enhanced by around 49.6% and 65.1% for indirect and direct processes, respectively, at a recycling rate of 7 MMSCFD. Compressor is required to increase the unreacted gas pressure to the desired pressure in the methanol reactor or dual methanol-DME reactor in both processes. Specific power consumption (SPC) was used as a tested parameter for the effectiveness of recycling unreacted gas. Based on the simulation, the direct DME synthesis process is superior over the indirect process in terms of DME and methanol productions, SPCs, and system energy efficiencies.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

Kartohardjono

Adji

Muharam

2020

International Journal of Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…In this concern, this work reports methanol conversion carried out at reaction temperature low enough (< 250 °C) to inhibit both hydrocarbon pool mechanism and olefins formation showing that catalyst structure affect strongly coke deposition and deactivation even when only DME is detected as product in reactor out-stream. In this sense, FER-type and MFI-type structure disclosed reliable shape-selectivity towards DME synthesis although more details about the role of acid sites should be better elucidate [27,29,37,40].…”

Section: Co2 + 3 H2 = Ch3oh + H2omentioning

confidence: 97%

“…Vapor-phase methanol dehydration was carried out over H-form zeolites in the temperature range 140-200 °C with a methanol weight hourly space velocity (WHSV) of 4.5 gMeOHh-1 gcat-1, in a lab-scale apparatus described elsewhere [40]. Before each catalytic test, the reactor was purged with nitrogen at 240 °C in order to remove moisture from the catalyst.…”

Section: Catalytic Testsmentioning

confidence: 99%

Direct CO2-to-dimethyl Ether Hydrogenation over CuZnZr/zeolite Hybrid Catalyst: New Evidences on the Interaction Between Acid and Metal Sites

Catizzone¹,

Bonura²,

Migliori³

et al. 2019

ACSM

View full text Add to dashboard Cite

The production of DME via one-pot CO2 hydrogenation is a strategic way of recycling CO2 with the production of a high-value added product. This work aims to investigate the effect of the main zeolite features, e.g. structure or acidity, on the activity, selectivity and stability of the catalyst for DME production via both methanol dehydration and one-pot CO2 hydrogenation. Several zeolites (i.e. FER and MFI) were synthesized and deeply characterized with XRD, B.E.T, NH3-TPD and FTIR. Obtained crystals were used as catalysts for methanol dehydration as well as for one-pot CO2-to-DME process. Obtained results allow giving new insights about the role of the interaction between metals and acid sites for an efficient DME production via one-pot CO2 hydrogenation. In particular, zeolite acidity plays a crucial role in methanol dehydration step and Lewis acid sites seems to be more active than Brønsted sites. Furthermore, metal/acid proximity plays are a key factor in one-pot CO2 hydrogenation; in fact, the catalytic performances of multifunctional catalytic bed improve by increasing the metal/acid sites proximity. The findings of this research allow to highlight the main factors to be taken into account in terms of design and optimization of new catalytic systems for DME synthesis.

show abstract

“…e dehydration reaction using zeolites has long been well understood [38][39][40][41][42][43][44] and it can be carried out in acidic as well as alkaline media. However, preference is given to acid catalysts in the literature [45][46][47][48][49].…”

Section: Zeolite Catalyzed Dehydrationmentioning

confidence: 99%

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Alsawalha

2019

Journal of Chemistry

View full text Add to dashboard Cite

After a thorough review of existing studies of clinoptilolite zeolites, three areas for potential investigation of the Saudi Arabian zeolites were found. They are the characterizations, the catalytic activity, active sites, and uses of natural clinoptilolite zeolites. First, no analysis is available worldwide to compare the percentage weight of local zeolites with those sourced from other countries, nor does one exist for the establishment on the zeolite conversion of MBOH with water on acidic catalysts at lower temperatures. Secondly, a review of current literature on the topic revealed that basic and active sites of Saudi Arabian zeolites have yet to be examined. Future investigation of zeolite catalytic activity can be achieved by methyl butynol test reaction (MBOH) and absorption-desorption of ammonia. In the characterization of a range of international materials, the methyl butynol test reaction was utilized, including on natural zeolites, natural clays, and synthesized hydrotalcites. However, the catalytic performance of natural Saudi Arabian clinoptilolite zeolites by test reaction of MBOH conversion has not been yet investigated. Therefore, this article also includes an outline of the general testing conditions and parameters required to execute the accurate characterization of local Saudi clinoptilolite under optimal test conditions. Likewise, knowledge of the important active acidic centers of local materials is prescribed. This can be ascertained by determining the conditions together with the test parameters for the application of the “temperature-programmed desorption of ammonia” method in order to obtain an accurate determination of local Saudi clinoptilolite acidic centers. Additionally, an outline of the catalytic activity of worldwide clinoptilolite is given in this article together with kinetic investigations of other sources for the clinoptilolite zeolite in order to form the basis for the testing of local Saudi clinoptilolite. The percentage average of chemical composition (Wt.%) of natural clinoptilolite from various countries is also included. Finally, a future research plan is proposed here. This will form the basis for a complete study or survey to be compiled detailing the modifications needed to increase the surface areas for Saudi natural clinoptilolite zeolites using different methods of modifications. This could enhance its application as acid catalysts for use in the retardation of coke formation and for membrane separation on cationic exchange.

show abstract

DME production by CO2 hydrogenation: Key factors affecting the behaviour of CuZnZr/ferrierite catalysts

Cited by 84 publications

References 39 publications

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

Direct CO2-to-dimethyl Ether Hydrogenation over CuZnZr/zeolite Hybrid Catalyst: New Evidences on the Interaction Between Acid and Metal Sites

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Contact Info

Product

Resources

About

DME production by CO2 hydrogenation: Key factors affecting the behaviour of CuZnZr/ferrierite catalysts

Cited by 84 publications

References 39 publications

CO2 Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

CO2 Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

Direct CO2-to-dimethyl Ether Hydrogenation over CuZnZr/zeolite Hybrid Catalyst: New Evidences on the Interaction Between Acid and Metal Sites

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Contact Info

Product

Resources

About

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

CO₂ Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)