Efficient and selective conversion of methanol to para-xylene over stable H[Zn,Al]ZSM-5/SiO2 composite catalyst

Pan, Donghui; Song, Xianghai; Yang, Xinhui; Gao, Lijing; Wei, Ruiping; Zhang, Jin; Xiao, Guomin

doi:10.1016/j.apcata.2018.03.006

Cited by 56 publications

(54 citation statements)

References 64 publications

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“…This was also confirmed by the Si/Al ratio obtained by ICP-OES listed in Table 3, which shows that a larger Si/Al ratio exhibited lower acid amounts. According to the glycerin aromatization reaction in fixed-bed and production analysis methods in our previous study [34,35], the catalytic performance of the catalysts were evaluated. The yields and distributions of different aromatics are shown in Figure 5.…”

Section: Characterization Of the N-hzsm-5 Catalystsmentioning

confidence: 99%

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Effects of Additives and Metals on Crystallization of Nano-Sized HZSM-5 Zeolite for Glycerol Aromatization

2019

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Nano-sized HZSM-5 (n-HZSM-5) was synthesized and applied in the aromatization of glycerol. The effects of additives (carboxymethylcellulose sodium, NaCl, sodium alginate, etc.) on the chemical and physic properties of n-HZSM-5 during preparation were investigated. Metal modification was also investigated based on the synthesized n-HZSM-5. The results showed that the addition of carboxymethylcellulose sodium (CMC-Na), NaCl and sodium alginate (SA) led to forming smaller sizes of HZSM-5 and promoted the acid amounts of the catalysts, which increased its catalytic activities for obtaining BTX. The highest BTX yield of ~35% was obtained by SA derived n-HZSM-5, and the life of the catalyst were both obviously promoted by the additives with a highest of ~11 h by γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH-560) derived n-HZSM-5. BTX yields could be improved by 40%by the addition of Zn and Cd in n-HZSM-5 while having little effect on the catalyst life.

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Section: Characterization Of the N-hzsm-5 Catalystsmentioning

confidence: 99%

“…The catalytic aromatization of glycerol was conducted in an experimental scale fixed-bed reactor reported in our previous work [34,35]. According to the previous studies, 1.2 g of catalyst with a size of 40~60 mesh (0.30 mm < d <0.45 mm) was packed in the stainless-steel reactor (inner diameter: 8 mm).…”

Section: Catalytic Reaction Proceduresmentioning

confidence: 99%

Effects of Additives and Metals on Crystallization of Nano-Sized HZSM-5 Zeolite for Glycerol Aromatization

2019

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“…Benzene, toluene, xylene (BTX) were the most important basic organic raw materials in petrochemical and polymer industry . In recent years, p‐xylene as a high value‐added intermediate had attracted great attention and owned a huge demand market . Traditionally, these were mainly produced by naphtha reforming and cracking .…”

Section: Introductionmentioning

confidence: 99%

Effect of the Post‐Treatment of HZSM‐5 on Catalytic Performance for Methanol to Aromatics

Dong

et al. 2020

ChemistrySelect

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The preparation of aromatic by methanol was the most effective way for rational utilization of resources. However, the catalyst for MTA reaction has not yet been successfully studied. Therefore, highly active and shape‐selective HZSM‐5 zeolite‐based catalysts were designed and synthesized by post‐treatments of desilication, dealumination, surface‐passivation and hydrothermal treatment tuning pore structure and acid amount and acid concentration of catalysts. XRD, SEM, TEM, BET, NH3‐TPD and Py‐IR were used for research and analysis the structure‐activity relationship between the catalysts and MTA reaction. The results showed that the total acid amount of catalyst shown a significant role in increasing the BTX selectivity. The selectivity of aromatics increased from 33 % to 58.1 % after hydrothermal treatment compared to the parent HZSM‐5 zeolite due to the decreased of total acid amount. Nevertheless the weak acid sites were crucial in increasing the p‐xylene selectivity. The selectivity of p‐xylene reached 63.8 % and 70.1 % after hydrothermal treatment and surface‐passivation due to the increased of weak acid sites, respectively. Modified HZSM‐5 zeolite‐base catalysts showed good application prospects in producing aromatics from methanol.

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“…Among all the metal species, zinc has received considerable attention due to its good selectivity toward aromatics, relatively low cost, and being less toxic. [8][9][10][11][12][13][14][15] In the appendix, Table 7 lists the catalytic performances of HZSM-5, zinc-impregnated HZSM-5 (Zn/ HZSM-5), silica-deposited HZSM-5 (Si/HZSM-5), and zincimpregnated silica deposited HZSM-5 (Zn/Si/HZSM-5) found in the literatures. The impregnation of Zn on HZSM-5 in general increased aromatics selectivity and decreased alkanes (methane, ethane, propane, butanes) selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…There were only a few published results on Zn/Si/HZSM-5. [12][13][14] Only Li et al 13 reported the selectivities of alkenes and aromatics. They observed a substantial increase in the combined selectivity for B, T, and p-X.…”

Section: Introductionmentioning

confidence: 99%

Controlling the product selectivity in the conversion of methanol to the feedstock for phenol production

Zambare

Wong

et al. 2019

RSC Adv.

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Efficient and selective conversion of methanol to para-xylene over stable H[Zn,Al]ZSM-5/SiO2 composite catalyst

Cited by 56 publications

References 64 publications

Effects of Additives and Metals on Crystallization of Nano-Sized HZSM-5 Zeolite for Glycerol Aromatization

Effects of Additives and Metals on Crystallization of Nano-Sized HZSM-5 Zeolite for Glycerol Aromatization

Effect of the Post‐Treatment of HZSM‐5 on Catalytic Performance for Methanol to Aromatics

Controlling the product selectivity in the conversion of methanol to the feedstock for phenol production

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