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Publications (26)
Hollow triple‐shelled Zn/MFI single crystals were designed by Ning Wang et al. in their Research Article (DOI: 10.1002/anie.202114786). They exhibit a considerably long lifetime as well as an enhanced shape selectivity for p‐xylene.
Hohle Zn/MFI‐Einkristalle mit dreifacher Schale wurden im Forschungsartikel von Ning Wang et al. entwickelt (DOI: 10.1002/ange.202114786). Die Kristalle weisen eine beträchtlich lange Lebensdauer sowie eine erhöhte Formselektivität für p‐Xylol auf.
The production of p‐xylene from the methanol to aromatics (MTA) reaction is challenging. The catalytic stability, which is inversely proportional to the particle size of the zeolite, is not always compatible with p‐xylene selectivity, which is inversely proportional to the external acid sites. In this study, based on a nano‐sized zeolite, we design...
The production of p-xylene from methanol to aromatics reaction is challenging. By now, the catalytic stability, which is inversely proportional to the particle size of the zeolite, is always not compatible with p-xylene selectivity, which is inversely proportional to the external acid sites. In this study, based on a nano-sized zeolite, we designed...
Molybdenum supported on zeolite HZSM-5 is the most studied catalyst for methane dehydroaromatization. However, the nature of its catalytic sites and their deactivation mechanisms remain unclear and controversial. Here, we report further insights into this system: first, the crystal size of HZSM-5 determines the form and location of the catalytic ac...
Methanol to aromatics (MTA) process not only involves the dehydrogenation-aromatization reactions but also the undesirable side reactions (e.g., hydrogen transfer, dealkylation, disproportionation, isomerization). As-produced aromatics composition was not favorable for the subsequent para-xylene (PX) manufacturing process in the MTA plant. In this...
We reported the effect of water on the conversion of ethene with H-ZSM-5 to make aromatics at 300-500 °C. We found water seriously decreased the conversion of ethene, the yield of aromatics, suppressed the hydrogen transfer reaction, changed the distribution of aromatics at low reaction temperature (300 °C). But the effect of water became relativel...
Direct conversion of syngas-to-aromatics (STA) is an increasing vital catalytic field that still contains much uncertainty. For the first time, we report the process simulation of STA via direct routes and indirect STA (syngas first to produce methanol, then methanol being converted into aromatics). The conversion of CO was selected as the sensitiv...
A temperature-shifting two-stage fluidized bed reactor technology was used to convert propane and its intermediate products into aromatics. The first stage served for the aromatization of propane with a Ga/ ZSM-5 catalyst at 570 C. The second stage served for the alkylation of the intermediates of olefins at 300 C. The increased yield of aromatics...
As an important catalyst of methanol-to-propylene (MTP), ZSM-5 zeolite has an anisotropic diffusion path and large pore size, resulting in the formation of undesirable heavy aromatic by-products Herein, we developed a surface-specific silica deposition method to block straight channels of nanosized ZSM-5 crystals selectively. By such coating method...
The conversion of methanol-to-hydrocarbons (MTH) has been studied over a series of Zn/ZSM-5 zeolites with different thickness of b-axis, as well as similar lengths of a-axis. It has been demonstrated that the decrease of b-axis thickness from 220 nm to 2 nm leads to the remarkably longer lifetime, accompanied by the shift of selectivity toward trim...
Hierarchical structure brings efficiency in many processes including metabolism, plant growth, and even in social networks. In society, connectivity between people forms a hierarchical network, and superior efficiency for information transfer is noticed. Such network is called small-world network. Although the number of people known by a single per...
We report the direct characterization of coke information in the clearly resolved (0 1 0) and (1 0 0) planes of various anisotropic MFI zeolites using EELS techniques, in a model reaction of methanol to hydrocarbons. For the first time, we found that the main coke species varied between different planes and depended on the crystal structure. The co...
Modern new coal chemical industry is not only a new spot in development of fundamental organic chemical industry in China, but also another revolution in chemical industry worldwide. Coal based chemical process include gasification, water gas shift, methanol synthesis and methanol to hydrocarbon. Among all these processes, methanol conversion plays...
Hierarchical structures bring efficiency to many processes, including metabolism, plant growth, and even social networks. In society, connectivity among people results in a hierarchical network with a superior efficiency for information transfer. These networks are known as small-world networks. Although the number of people known by a single perso...
Nano ZSM-12 zeolite, with a huge external surface area and lower ratio of BrönstedBr¨Brönsted to Lewis acids, exhibited high activity and selectivity for the direct transformation of methanol into multi-methylbenzenes with molecule sizes that were larger than the 1-D pore of ZSM-12, via the production of xylene inside the pore and complete external...
Herein, we have built a discrete Ising model for deactivation considering the cage connectivity, inspired by the game of Go. An analytical solution for a simplistic 1D model is found, and it shows good consistency with the experimental results over ZSM-12. Some anomalous pseudo-phase transition phenomena in the deactivation process and in the acid...
Nano ZSM-12 zeolite, with a huge external surface area and lower ratio of BrönstedBr¨Brönsted to Lewis acids, exhibited high activity and selectivity for the direct transformation of methanol into multi-methylbenzenes with molecule sizes that were larger than the 1-D pore of ZSM-12, via the production of xylene inside the pore and complete external...