Superior solid acid catalysts are needed for not only existing industrial processes but environmental consideration.Considering the similar chemical properties,the same influence on the mechanism and the rates of the key steps in acid catalysis of the analogous active sites in homogeneous and heterogeneous acid catalysts,the similarity and differences in behaviour of analogous active sites are widely discussed using Bronsted and Lewis acid sites as examplees on the basis of the modern theory of homogeneous acid catalysis.Far going analogous in the structures and the mechanisms of catalytic action of these active sites in various systems are further elucidated as well as the special role of solid lattice in the formation of active site in solid acid catalysts.The mechanism based on the formation of surface carbonium ion is also criticized.Lastly some suggestions are offered on designing more effective solid acid catalysts.

An effect occurring in heterogeneous catalysts by electrochemical mathod is described in this paper. The finding course, general features and research methods of NEMCA are epitomized in addition to outline of the NEMCA(Non-faradaic Electrochemical Modification of Catalysis Activity) effect.

The promoting effect of Ba and Cs for ethylene epoxidation was investigated by the chemical modification of surface of electrolytic silver. In comparison with unmodified electrolytic silver surface,Ba modified surface is more active and Cs modified surface has higher selectivity at the expense of activity. These results are consistent with those of α-Al₂O3 supported silver samples.So it is a single and reliable method for searching and studying the silver catalyst promoters.

This paper reported the results from industrial side-stream test of the new NT-13 low-temperature desulfurizing agent. Results from 500 hours of continuous operation of the industrial litre-scale raw particles showed that NT-13 desulfurizing agent can be used in industrial cases,with its excellent desulfuring performance and high resistance to process upset and penetrating desulfurizing capacity up to 10%.

In this paper,the experiment results for a spherical ammonia catalyst prepared from remelt scrap are reported by using spheroidizer and sintering furnace.The catalytic properties come up to the advanced levels of C73-3-03 spherical ammonia catalyst prepared by UCI(USA).