Methanol-to-hydrocarbons: catalytic materials and their behavior

Sulfated zirconia and its modified versions as promising catalysts for industrial processes

This review article deals with recent progress in the preparation of sulfated zirconia (SZ)-bassed, strong solid-acid catalysts, the characterization of their physicochemical properties and the evaluation of their catalytic performance in various promising applications. Strong emphasis was put on discussion of controversial issues such as the strength of acid sites, the nature of active sites, the reaction mechanism, and the role and state of supported platinum. An important part of this work was devoted to recent catalytic applications.

Sulfated Zirconia-Based Strong Solid-Acid Catalysts: Recent Progress

Porphyrins in analytical chemistry. A review.

(1990). Conversion of Methane by Oxidative Coupling. Catalysis Reviews: Vol. 32, No. 3, pp. 163-227.

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Conversion of Methane by Oxidative Coupling

Spectrophotometric determination of copper with α, β, γ, δ-tetraphenylporphine trisulfonate

Highly selective and sensitive spectrophotometric determination of iron(II) and cobalt(III) with 4-(2-pyridylazo)resorcinol(PAR)

A theoretical interpretation is given for the site selectivities of the exchangeable alkali and alkaline-earth metal cations in zeolite A. Zeolite A was divided into two structures, ionic and covalent. The cation-lattice interaction energies consisting of the electrostatic, polariz1ation, dispersion, repulsion, and charge transfer energies were calculated for the cations at the six- and eight-membered oxygen ring sites in a simplified model of zeolite A structure. As a result, the site selectivities determined for cations were as follows: Li/sup +/, Na/sup +/, Ca/sup 2 +/, and Sr/sup 2 +/ ions prefer the six-membered oxygen ring site, whereas K/sup +/, Cs/sup +/, and Ba/sup 2 +/ ions prefer the eight-membered oxygen ring site. These results are in good agreement with those obtained experimentally. It was concluded that this theoretical method would have considerable use in the determination and understanding of the cation sites and adsorption characteristics of zeolite A and possibly zeolites X and Y.

Kazuo Aomura

Papers

Spectrophotometric determination of copper with α, β, γ, δ-tetraphenylporphine trisulfonate

Highly selective and sensitive spectrophotometric determination of iron(II) and cobalt(III) with 4-(2-pyridylazo)resorcinol(PAR)

A theoretical study of the site selectivity of the zeolite cation. 1. Site selectivities of alkali and alkaline earth metal cations in zeolite A

The extraction-spectrophotometric determination of chromium(III) with 4-(2-pyridylazo)-resorcinol

The conversion of methanol into hydrocarbons over modified zirconia