Enhanced performance of glycerol to aromatics over Sn-containing HZSM-5 zeolites

Wang, Fei; Xiao, Weiyin; Gao, Lijing; Xiao, Guomin

doi:10.1039/c6ra03358j

Cited by 47 publications

(31 citation statements)

References 55 publications

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“…As the only carbon containing species in the feed was glycerol, all three carbon containing products (oxygenates, gases, and aromatics) derived from it. As shown in Figure , the partially deoxygenated products, oxygenates, are proposed as intermediates resulting in the fully deoxygenated products—gases and aromatics, as also suggested by others . This leads to the proposed steps R1, R2, and R3.…”

Section: Resultssupporting

confidence: 61%

“…A mechanism of sequential hydrodeoxygenation (HDO) and aromatization was proposed for GTH conversion. Similar works, using catalysts such as PdO/H‐ZSM‐5, Zn/H‐ZSM‐5, and Sn/H‐ZSM‐5, have also been reported …”

Section: Introductionsupporting

confidence: 74%

“…For example, step R1, when converting glycerol to acrolein, involves two sequential dehydration reactions, while more complex reactions (e.g., hydrogenation, dehydrogenation, deoxygenation, etc.) occur when other oxygenates are produced . Step R2 includes deoxygenation, dehydrogenation, and CC bond cleavage reactions, while step R4 includes oligomerization, cyclization and dehydrogenation.…”

Section: Resultsmentioning

confidence: 99%

“…The GTH conversion is a complex process, involving more than 20 species, such as acetaldehyde, propenal (acrolein), hydroxyacetone, ethylene, and C 6 C 8 aromatic hydrocarbons. The reaction pathways, including dehydration, dehydrogenation/hydrogenation, and oligomerization, have been proposed . To our knowledge, however, kinetic studies of GTH conversion have not been reported previously.…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of glycerol conversion to hydrocarbon fuels over Pd/H‐ZSM‐5 catalyst

Xiao

Varma

2017

AIChE Journal

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The utilization of glycerol, primary byproduct of biodiesel production, is important to enhance process economics. In our recent prior work, it was shown that glycerol can be converted to hydrocarbon fuels over bifunctional catalysts, containing a noble metal supported on H‐ZSM‐5. Over Pd/H‐ZSM‐5 catalyst, an optimal ∼60% yield of hydrocarbon fuels was obtained. In the present work, based on experimental data over Pd/H‐ZSM‐5 catalyst, a lumped reaction network and kinetic model are developed. Using differential kinetic experiments over the temperature range 300–450°C, the rate constants, reaction orders, and activation energies are obtained for each reaction step. The predicted values match well with experimental data for glycerol conversion up to ∼90%. © 2017 American Institute of Chemical Engineers AIChE J, 63: 5445–5451, 2017

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Section: Resultssupporting

confidence: 61%

Section: Introductionsupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Kinetics of glycerol conversion to hydrocarbon fuels over Pd/H‐ZSM‐5 catalyst

Xiao

Varma

2017

AIChE Journal

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“…The commonly accepted GTA network includes glycerol dehydration to form propanal and acrolein, which is further involved in cracking, deoxygenation, oligomerization, cyclization, H‐transfer (gas route) or aldol condensation (liquid route) steps to form aromatics (Scheme ) ,. For the convenience of research, the product components obtained in GTA process can be classified into four primary categories: gas products (including light alkanes and olefins, CO, CO 2 , H 2 , et al.…”

Section: Resultsmentioning

confidence: 92%

Study on Catalytic Performance and Deactivation Behavior of HZSM‐5 in Aromatization of Glycerol

et al. 2018

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We have investigated both the catalytic performance and deactivation behavior of HZSM‐5 under aromatization of glycerol condition which represents an alternative aromatics manufacturing route for using “green” fuel sources to replace the traditional fossil fuels. The effects of solvents, glycerol contents, reaction temperature and weight hourly space velocity (WHSV) on product distribution and coking process over HZSM‐5 were studied. Three stages could be clearly distinguished in HZSM‐5 catalyzed glycerol to aromatics (GTA) process: induction stage, auto‐catalytic stage and rapid deactivation stage. The synergetic effect between methanol and glycerol promoted the conversion of glycerol dehydrated products into aromatic hydrocarbons, resulting in higher yields of aromatics and lower coking rate. More glycerol content in the feed would result in more low temperature coke originated from aldehydes/ketones and less high temperature coke derived from polyaromatics. Under the selected optimum reaction conditions of 450 °C, WHSV=0.71 mL ⋅ g−1 ⋅ h−1 with an methanol/glycerol ratio of 40/60 over HZSM‐5 catalyst, the aromatics yields reached 42.1 % and the catalyst lifetime was 14.5 h. Higher temperature and lower WHSV benefited the production of harder coke while lower temperature and higher WHSV enhances the formation of softer coke.

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Emphasis on the Properties of Metal‐Containing Zeolites Operating Outside the Comfort Zone of Current Heterogeneous Catalytic Reactions

et al. 2020

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The development of catalysts that can operate under exceptionally harsh and unconventional conditions is of critical importance for the transition of the energy and chemicals industries to low‐emission and renewable chemical feedstocks. In this review we will highlight materials and more specifically metal‐containing zeolite catalysts that have been tested under harsh reaction conditions such as high temperature light alkane conversion and biomass valorization. Particular attention will be given to studies that explore the stability and recyclability of metal‐containing zeolite catalysts operating in continuous modes. Metal‐containing zeolites are considered as an important class of catalysts operating outside the comfort zone of current heterogeneous catalytic reactions in both gas and liquid phase reactions. The relationship between the properties of the metal‐containing zeolite and catalytic performance will be explored.

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Enhanced performance of glycerol to aromatics over Sn-containing HZSM-5 zeolites

Abstract: Two routes exist in one-step catalytic conversion of glycerol to aromatics.

Cited by 47 publications

References 55 publications

Kinetics of glycerol conversion to hydrocarbon fuels over Pd/H‐ZSM‐5 catalyst

Kinetics of glycerol conversion to hydrocarbon fuels over Pd/H‐ZSM‐5 catalyst

Study on Catalytic Performance and Deactivation Behavior of HZSM‐5 in Aromatization of Glycerol

Emphasis on the Properties of Metal‐Containing Zeolites Operating Outside the Comfort Zone of Current Heterogeneous Catalytic Reactions

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