photodegradation of dicamba, an ionizable herbicide, using tio2 supported on hzsm-11 zeolite was investigated. four photocatalysts with different weight percentages (wt%) of tio2 were evaluated: 3%, 10%, 30% and 50%. the effects of the catalyst concentration, the initial ph value and the repeatability of the photocatalytic activity after multiple cycles of reuse were also evaluated. results sho...

The catalytic degradation of chlorinated volatile organic compounds (CVOCs) at low temperatures is a great challenge. In this work, Pt-Co/HZSM-5 ternary catalysts were synthesized and used for the oxidation dichloromethane (DCM). By adding only trace amounts Pt (0.01 wt. %), catalyst exhibits better CO2 yield lower by-product than Co/HZSM-5 catalyst. Besides, it maintained stable activity least...

The promotional effect of Zn was investigated relative to the calcining activation HZSM-5. It found that lignin separated from walnut shell could be liquefied into small molecular ethers such as anisole by modified catalyst. Experimental results showed that, after loading Zn, HZSM-5 catalyst retained its original crystal structure, which exhibited good metal dispersion. Besides, due existence ...

This study investigated on the co-pyrolysis of microalgae Chlorella vulgaris and high-density polyethylene (HDPE) waste mixtures which was performed with three types catalysts, namely limestone (LS), HZSM-5 zeolite, novel bi-functional LS/HZSM-5/LS. Kissinger-Kai (K-K) model-free method coupled Particle Swarm Optimization (PSO) model-fitting using thermogravimetric experimental data. A global s...

The ammoxidation of ethane over the conventional metal oxide and Co/zeolite catalysts faces challenge inadequate selectivity owing to formation CO2, N2, NOx. Here we report that Sn modified ZSM-5 catalyst is highly selective for ammoxidation. C- N-based acetonitrile selectivities are up 80 % 70 Sn/HZSM-5, but they below 60 20 %, Co/HZSM-5. We suggested (IV) cations critical active sites formati...

Cobalt molybdenum catalysts supported on novel activated carbon-HZSM-5 composites with different mass ratios were prepared by wet-impregnation method and pre-sulfided CS2. Characterization of these was done using X-ray powder diffraction, Fourier transform infrared spectroscopy, N2 adsorption-desorption, scanning electron microscope analytics. Their activity for the hydrodesulfurization reactio...

In this paper, Ag/ZnO/HZSM-5ternary nanocomposites with different Ag loadings were prepared by the photo precipitation method. The prepared photocatalysts were characterized by XRD, BET, SEM and TEM. The photocatalytic activity of ZnO/HZSM-5 for 4-nitrophenol (4-NP) degradation was increased by silver doping. Effects of various parameters such as the initial concentration of 4-NP, pH and Ag loa...