Hydrothermal synthesis of nanosized SAPO-34 molecular sieves by different combinations of multi templates

Najafi, Nasim; Askari, Sima; Halladj, Rouein

doi:10.1016/j.powtec.2014.01.037

Cited by 67 publications

(48 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Combining TEA with other templates has no effect on the crystal size but increases the crystallinity. [12] …”

Section: Semmentioning

confidence: 99%

“…This result may be due to their high crystallinity. [12] The NiAPSO-34 sample (S-1) has the least BET of about 368 m 2 g…”

Section: Betmentioning

confidence: 99%

“…Najafi et al [12] reported that in the case of samples, which were synthesised with DEA (diethylamine) and morpholine as templates, the typical cubic-like rhombohedra morphology is obtained.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Incorporation of mixed metals into SAPO-34 frameworks by the dry-gel conversion method using mixed templates: investigating catalysts characterisation and performance

Amirhosseini

Askari

Halladj

2016

Journal of Experimental Nanoscience

Self Cite

View full text Add to dashboard Cite

The crystallisation of the MeAPSO-34 material was studied under drygel conversion conditions and using two and three templates. This study has been focused on the effect of the incorporation of a mixture of Ni and Mn into the SAPO-34 framework. The MeSAPO-34 samples were characterised by X-ray diffraction, energy-dispersive Xray spectrometer, scanning electron microscope, temperatureprogrammed desorption and BrunnerÀEmmettÀTeller. The influence of metal incorporation into the framework of SAPO-34 (MeAPSO-34) on methanol conversion was investigated in this study. The performances on methanol conversion for these catalysts were different according to the properties of metals incorporated into the SAPO-34 structure. The catalytic performance demonstrated high activity and light olefins selectivity for the prepared catalysts. Among the light olefin products, Mn and Ni incorporation is helpful for propylene generation, but samples with a mixture of Ni and Mn favour the ethylene production.

show abstract

“…Combining TEA with other templates has no effect on the crystal size but increases the crystallinity. [12] …”

Section: Semmentioning

confidence: 99%

“…This result may be due to their high crystallinity. [12] The NiAPSO-34 sample (S-1) has the least BET of about 368 m 2 g…”

Section: Betmentioning

confidence: 99%

See 1 more Smart Citation

Incorporation of mixed metals into SAPO-34 frameworks by the dry-gel conversion method using mixed templates: investigating catalysts characterisation and performance

Amirhosseini

Askari

Halladj

2016

Journal of Experimental Nanoscience

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are some parameters, such as template [12][13][14][15][16], Si/Al The XRD patterns of the synthesized samples are given in Figure 1. It can be seen that all the samples are in agreement with that of the CHA-structure SAPO-34 (PDF 47-0617) [2].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of SAPO-34 Molecular Sieves via Novel Intermittent Hydrothermal Treatment and Its Effect on the Crystallization and Product Properties

et al. 2017

View full text Add to dashboard Cite

Intermittent hydrothermal treatment was introduced into the synthesis of SAPO-34 molecular sieves to control the nucleation and the growth in the crystallization. The effect of the crystallization time, the order of long-time and short-time crystallization in two-stage crystallization, and frequency in multi-stage crystallization on synthesis, physicochemical properties and catalytic performance for conversion of methanol to light olefins (MTO) has been studied. The results show that pure SAPO-34 can be obtained with increasing crystallization time. The interruption of the initial crystallization is more beneficial for improving the Si distribution and the MTO catalytic performance of SAPO-34 molecular sieves. The sample obtained by repeatedly alternating heating and cooling during crystallization shows smaller particle size, higher acidity, longer lifetimes and higher yields of ethylene than that obtained by the conventional continuous crystallization at high temperature.

show abstract

“…Discussing about the morphology and particle size, it is correct to say that the final product morphology is dependent on the nature and composition of the template mixture. Particle size reduction to sub-micrometer size has been the challengeable subject in the fields of academic research considering the superior performance of the small particles of SAPO-34 in MTO process [33][34][35][36]. For instance, 4 opposite trends of TEAOH and DEA can be tailored to a certain point by using the mixtures of both SDAs [7].…”

Section: Introductionmentioning

confidence: 99%

Dual-template synthesis of nanostructured CoAPSO-34 used in methanol to olefins: Effect of template combinations on catalytic performance and coke formation

Aghamohammadi

Haghighi

2015

Chemical Engineering Journal

View full text Add to dashboard Cite

Hydrothermal synthesis of nanosized SAPO-34 molecular sieves by different combinations of multi templates

Cited by 67 publications

References 24 publications

Incorporation of mixed metals into SAPO-34 frameworks by the dry-gel conversion method using mixed templates: investigating catalysts characterisation and performance

Incorporation of mixed metals into SAPO-34 frameworks by the dry-gel conversion method using mixed templates: investigating catalysts characterisation and performance

Synthesis of SAPO-34 Molecular Sieves via Novel Intermittent Hydrothermal Treatment and Its Effect on the Crystallization and Product Properties

Dual-template synthesis of nanostructured CoAPSO-34 used in methanol to olefins: Effect of template combinations on catalytic performance and coke formation

Contact Info

Product

Resources

About