Abstract. SAPO-34 and ZnAPO-34 materials (Zn incorporated by isomorphic substitution in AlPO-34 material) were synthesized hydrothermal synthesis using triethylamine (TEA) as the structure directing agent (SDA). The presented both is to chabazite zeolite (CHA). However, they have different properties such textural (Z34 S34 a surface area of ​​485 603 m2/g, respectively), crystal sizes acid prop...

background and objectives : zeolite is a group of anionic hydrated aluminosilicates with a tridimensional structure which has great implications in remediation of water, sediment and soil resources. the present research aims at physicochemical investigation, clay mineralogy and micromorphology of soils along rafsanjan-sarcheshmeh lithotoposequence, southeastern iran. materials and methods: the ...

-In the active hydrothermal areas of Tengchong there is widespread evidence that hydrothermal minerals are deposited directly from the geothermal fluid or from water-rock interactions. X-ray powder diffraction, electron microprobe analyses and classical optical methods were used to identify these hydrothermal minerals. Sulfates (gypsum, alunite, alunogen, halotrichite, etc.), carbonates (calcit...

mineral dissolution and precipitation may occur. The effect of alkaline solutions on the transformation of Buried waste storage tanks at the USDOE Hanford Reservation clay minerals has been the subject of intensive research in Washington State have released solutions containing high concentrations of Na, OH, NO3, and Al into the vadose zone. When such (Cuadros and Linares, 1996; Bauer and Berge...

Generating active intermediates from deactivating coke molecules by a regeneration process that produces valuable syngas as by-product almost sounds too good to be true. In recent publication in Nature Communications, Zhou and co-workers demonstrated this innovative approach converting into naphthalenic cations steam cracking the industrially used SAPO-34 material, after it was methanol-to-olef...

Porous materials, in particular microporous zeolites, are the working horses industry mainly as catalysts, adsorbents or ion-exchangers. In order to further improve their performance and open new fields of application, one could take advantage a well on purpose designed hierarchical porous structures overcome, i.e., transport limitation into narrow, interconnected channels with special reactivi...

•Water-involved methane-selective oxidation by dioxygen over Cu–CHA zeolite catalyst•Methanol space-time yield of 543 mmol/molCu/h achieved at methanol selectivity 91%•Both monomeric and dimeric Cu species can catalyze the methane-to-methanol conversion•Various undergo interconversion under employed reaction conditions Methane is an abundant fossil resource widely distributed throughout earth, ...

Stromal derived factor-1α (Sdf-1α), a chemoattractant chemokine, along with its exclusive receptor CXCR4, plays a major role in tumor growth, angiogenesis, metastasis and in development. Recently, the Sdf-1α signaling pathway was shown to be important for zebrafish somitogenesis (Holloway, et al 2007). Somitogenesis is an important embryological process as it establishes the segmented nature of...