Catalytic cracking of n-hexane over HEU-1 zeolite for selective propylene production: Optimizing the SiO2/Al2O3 ratio by in-situ synthesis

Zhang, Yafei; Liu, Xiaoling; Sun, Liyuan; Xu, Qiaoqing; Wang, Xujin; Gong, Yumei

doi:10.1016/j.fuproc.2016.07.019

Cited by 21 publications

(15 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Coz‐75 displays the highest yields of ethylene (14.7 wt %) and propylene (38.3 wt %), which are higher than Mix‐75 by 3.7 and 6.3 percentage points, respectively. It is worth noting that the propylene yield over Coz‐75 is higher than the pure EU‐1 zeolite, while previous research has shown that EU‐1 had higher propylene yield than the conventional catalytic cracking catalyst of ZSM‐5 by 9.0 % under the same reaction conditions . During the whole catalytic process, Coz‐75 also exhibits the highest yield of the ethylene and propylene than other samples.…”

Section: Resultsmentioning

confidence: 82%

“…All of the profiles show two desorption peaks in the temperature region of 350–550 and 550–850 K, which are attributed to the NH 3 desorbed from weak and strong acidic sites, respectively. The acid amount and acid strength given by the integrated areas and peak temperatures are listed in Table S7 in the Supporting Information . Compared to EU‐1, ZSM‐48 and Mix‐75, Coz‐75 exhibits remarkably more acid amount, while the acid strength, especially the strong acid is also higher than others.…”

Section: Resultsmentioning

confidence: 99%

“…The products were analyzed online using an Agilent GC 7890 gas chromatograph equipped with a flame ionization detector (FID) and HP‐PLOT Q capillary column (30 m, 0.53 mm id, stationary phase thickness 40 μm). The n ‐hexane conversion, product selectivity and yields were calculated according to the method in our previous work . All of the percent values used in this paper were taken in weight proportions.…”

Section: Methodsmentioning

confidence: 99%

“…A major challenge is the exploration of highly effective catalysts. Recently, EU‐1 zeolites with SiO 2 /Al 2 O 3 ratios ranging from 55 to 300 were evaluated systemically in the n ‐hexane cracking reaction . We have observed that high‐silica EU‐1 (SiO 2 /Al 2 O 3 ratio of ca.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, EU‐1 zeolites would produce the low aromatic hydrocarbons, which could be attributed to the more confined channel system (0.41×0.58 nm). Meanwhile, ZSM‐48‐300 was also shown to exhibit high propylene selectivity and low aromatics compared to the best alternative ZSM‐5 . In addition, EU‐1 zeolites have tremendous potential for applications in the isomerization of aromatics and the conversion of methanol to hydrocarbons …”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Synthesis of EU‐1/ZSM‐48 Co‐Crystalline Zeolites from High‐Silica EU‐1 Seeds: Tailoring Phase Proportions and Promoting Long Crystalline‐Phase Stability

Zhang

Liu

Sun

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

A facile, specific, seed-assisted strategy for the synthesis of EU-1/ZSM-48 co-crystalline zeolites in the presence of hexamethonium ions (HM ) has been developed. EU-1/ZSM-48 co-crystalline zeolites with various phase proportions, with EU-1 in the range of 25 wt %-86 wt %, were obtained by adding high-silica EU-1 seeds (SiO /Al O ratio of 300) and adjusting the synthesis parameters. Not only can the phase proportions of EU-1/ZSM-48 co-crystalline zeolites be controlled, but also the stability period for co-crystallization of the two phases can be extended through varying the amount of EU-1 seeds and the HM template. Moreover, with the increase of the EU-1 proportion in the EU-1/ZSM-48 co-crystalline, the framework SiO /Al O ratios of EU-1 phase promotes steadily. Major differences in acidity and textural properties of the EU-1/ZSM-48 co-crystalline zeolites (Coz) were found with varying phase proportions, due to their distinct topological structures, crystal morphology and asymmetry between the EU-1 and ZSM-48 phases. For instance, the EU-1/ZSM-48 zeolite containing 75 wt % of EU-1 (Coz-75) possesses specific acidity and mesoporous characteristics, showing an excellent catalytic activity and stability in n-hexane cracking reaction. Compared to EU-1, ZSM-48, and a mechanical mix of the two zeolites (Mix-75), Coz-75 resulted in the highest hexane conversion and yields of light olefins, with a propylene yield, in particular, up to 38.3 wt %, which is 6.3 % more than that of the Mix-75 sample.

show abstract

Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis of EU‐1/ZSM‐48 Co‐Crystalline Zeolites from High‐Silica EU‐1 Seeds: Tailoring Phase Proportions and Promoting Long Crystalline‐Phase Stability

Zhang

Liu

Sun

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

show abstract

Catalytic Cracking of Hydrocarbons to Light Olefins

Xiao

Zhao

2022

Heterogeneous Catalysis for Sustainable Energy

View full text Add to dashboard Cite

Preparation of Novel Hierarchical Catalysts by Simultaneous Generation of β‐Zeolite and Mesoporous Silica for Catalytic Cracking

Oshimura,

Tanaka,

Nagata

et al. 2024

ChemPlusChem

View full text Add to dashboard Cite

The gel skeletal reinforcement (GSR) method was applied at the preparation stage of β‐zeolite to prepare a novel hierarchical catalyst. A solution of hexamethyldisiloxane (HMDS) and acetic anhydride, a GSR reagent, was added to the mixture of colloidal silica, sodium aluminate, tetraethylammonium hydroxide, sodium hydroxide and water, and successive aging and hydrothermal treatment gave microporous β‐zeolite surrounded by mesoporous silica like core‐shell structure. Its properties were characterized by XRD, nitrogen adsorption and desorption, NH3‐TPD, TEM, and TG‐DTA measurements, and further characteristics of the catalysts produced were clarified by the catalytic cracking of n‐dodecane. The hierarchical structure of microporous zeolite and mesoporous silica was shown from GSR‐2.9HS‐H‐Beta to GSR‐3.2HS‐H‐Beta, where the molar ratio of HMDS and silica source of β‐zeolite was 2.9~3.2:100. It was found that in the catalytic cracking of n‐dodecane, the relative activity (the conversion per the amount of zeolite crystals) increased with the increase in mesopore volume and surface area. The result indicated that the introduction of mesopores was effective even in catalytic cracking of small molecule of n‐dodecane.

show abstract

Catalytic cracking of n-hexane over HEU-1 zeolite for selective propylene production: Optimizing the SiO2/Al2O3 ratio by in-situ synthesis

Cited by 21 publications

References 63 publications

Synthesis of EU‐1/ZSM‐48 Co‐Crystalline Zeolites from High‐Silica EU‐1 Seeds: Tailoring Phase Proportions and Promoting Long Crystalline‐Phase Stability

Synthesis of EU‐1/ZSM‐48 Co‐Crystalline Zeolites from High‐Silica EU‐1 Seeds: Tailoring Phase Proportions and Promoting Long Crystalline‐Phase Stability

Catalytic Cracking of Hydrocarbons to Light Olefins

Preparation of Novel Hierarchical Catalysts by Simultaneous Generation of β‐Zeolite and Mesoporous Silica for Catalytic Cracking

Contact Info

Product

Resources

About