Synthesis of high-Si hierarchical beta zeolites without mesoporogen and their catalytic application in the methanol to propene reaction

Zhao, Xing; Wang, Linying; Guo, Peng; Yan, Nana; Sun, Tantan; Lin, Shanfan; Guo, Xinwen; Tian, Peng; Liu, Zhongmin

doi:10.1039/c8cy00631h

Cited by 28 publications

(24 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12 C/ 13 C‐methanol switch experiments revealed that the olefin methylation/cracking mechanism dominated the reaction. Afterward, hierarchical porous structure was further introduced into high‐silica Beta by using a concentrated system . The low water dosage was found to accelerate the nucleation and crystal growth rate, and promote the formation of nanoaggregates by preventing the further fusion of the primary grains.…”

Section: Toward Enhanced Ethylene or Propylene Selectivitymentioning

confidence: 99%

Recent Progress in Methanol‐to‐Olefins (MTO) Catalysts

et al. 2019

Self Cite

View full text Add to dashboard Cite

Among the 8-MR molecular sieves, silicoaluminophosphate SAPO-34 with 3D channels and moderate acid strength represents the most interesting one, the light olefins selectivity of which could reach up to 90% or even higher. [7] The excellent MTO performance of SAPO-34 was first reported by Dalian Institute of Chemical Physics (DICP) in 1990. [8] The researchers also demonstrated the good regeneration stability and high-temperature steam stability of Inspired by these pioneering discoveries, extensive research efforts have been devoted to SAPO-34 focusing on the elucidation of its crystallization mechanism, synthesis optimization, and the relevant catalytic studies, which greatly promote the technological development of the MTO process. Although SAPO-34 exhibits high catalytic activity and high selectivity toward light olefins, it suffers a rapid deactivation due to the coke deposition. Moreover, the MTO reaction on SAPO-34 catalyst is highly exothermal. These features determine that the industrial MTO process based on SAPO-34 catalyst has to adopt fluidized bed reactor, which allows efficient heat transfer and enables the continuous regeneration of the catalyst. In 2010, the world's first commercial MTO unit was successfully commissioned in Baotou, China by DICP (named DMTO technology). [5,10] The production capacity of ethylene and propylene is 0.6 Mt a −1 . To supply commercial catalysts for the DMTO unit, a 2000 t a −1 catalyst manufacturing plant was started up in Dalian in 2008. Afterward, DICP developed the DMTO-II technology, in which the byproducts of C 4 + are separated and introduced into a fluidized-bed cracking reactor to improve the yields of ethylene and propylene. Both the cracking unit and the MTO unit share one regenerator and use the same catalyst. By the end of 2018, thirteen DMTO units have been put into operation with a total production capacity of 7.16 Mt a −1 . Moreover, DICP launched the new generation of DMTO catalyst and completed the pilot test of the DMTO-III technology in 2018, both of which aim to further improve the olefins yield of DMTO units. The catalyst and technology development of the DMTO process are summarized in Figure 1.Based on SAPO-34 catalyst, UOP and Norsk Hydro also developed an MTO process with a low-pressure fast fluidizedbed reactor. [11] In 2013, a commercialized MTO plant (0.3 Mt a −1 olefins) was commissioned in Nanjing, China, which combines the UOP/Hydro MTO process and the total/UOP olefin cracking process to enhance the yield of ethylene and propylene. In addition, Shanghai Research Institute of Petrochemical Technology Methanol conversion to olefins, as an important reaction in C1 chemistry, provides an alternative platform for producing basic chemicals from nonpetroleum resources such as natural gas and coal. Methanol-to-olefin (MTO) catalysis is one of the critical constraints for the process development, determining the reactor design, and the profitability of the process. After the construction and commissioning of the world's first MTO plant by Dalian I...

show abstract

Section: Toward Enhanced Ethylene or Propylene Selectivitymentioning

confidence: 99%

Recent Progress in Methanol‐to‐Olefins (MTO) Catalysts

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…[369] Bottom-Up Methods-Template-Free: In contrast to previous template-assisted hydrothermal synthesis procedures, two studies have been found that manage to synthesize hierarchical beta zeolites without using any templates. [370,371] Considering the first, Zhao et al executed the crystallization of high Si hierarchical beta zeolites by kinetic regulation of the crystallization process. They worked under low water conditions, which facilitated nucleation and crystal growth and ensured that the fusion of individual nanocrystallites inside the particle is restrained.…”

Section: Betamentioning

confidence: 99%

“…This could be explained by a slower coking rate, which was a consequence of the improved utilization of the interior acid sites, and the enhanced molecular diffusion. [370] Nanozeolites and Their Assembly: Nanostructured beta zeolites can be synthesized in multiple ways. A first method was proposed by Xiong et al who performed an aerosol-assisted hydrothermal method in NaF medium in presence of TEAOH.…”

Section: Betamentioning

confidence: 99%

“…In contrast to previous template‐assisted hydrothermal synthesis procedures, two studies have been found that manage to synthesize hierarchical beta zeolites without using any templates. [ 370,371 ] Considering the first, Zhao et al. executed the crystallization of high Si hierarchical beta zeolites by kinetic regulation of the crystallization process.…”

Section: Synthesis Of Hierarchical 12‐mr Zeolitesmentioning

confidence: 99%

“…This could be explained by a slower coking rate, which was a consequence of the improved utilization of the interior acid sites, and the enhanced molecular diffusion. [ 370 ]…”

Section: Synthesis Of Hierarchical 12‐mr Zeolitesmentioning

confidence: 99%

See 2 more Smart Citations

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

et al. 2020

View full text Add to dashboard Cite

Zeolites are highly crystalline aluminosilicates with welldefined pores that are constructed of SiO 2 and AlO 4 tetrahedra. These tetrahedra can be linked together in different unique ways to form various materials with a specific topology. [1] According to the International Zeolite Association (IZA), more than 250 different topologies, which are all assigned with a three-letter code, have been identified. [2] The micropores in zeolites are typically constructed from 8, 10, or 12 tetrahedral atoms

show abstract

Mesoporous Zeolites: Synthesis and Catalytic Applications

Xiao

2022

Functional Materials From Colloidal Self‐Assembly

View full text Add to dashboard Cite

Synthesis of high-Si hierarchical beta zeolites without mesoporogen and their catalytic application in the methanol to propene reaction

Abstract: High-Si single-crystalline beta zeolites with intracrystal mesopores were synthesized for the first time and investigated as catalysts for the methanol to propene (MTP) reaction.

Cited by 28 publications

References 52 publications

Recent Progress in Methanol‐to‐Olefins (MTO) Catalysts

Recent Progress in Methanol‐to‐Olefins (MTO) Catalysts

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

Mesoporous Zeolites: Synthesis and Catalytic Applications

Contact Info

Product

Resources

About