Abstract: Provided is a diagnostic apparatus easily applied to diagnosis of a small lot product, etc. When measurement data on a measurement object is inputted sequentially, a filter section (408) performs filtering of the measurement data. When new measurement data is employed as diagnosis object data, a statistic processing section (420) updates diagnosis reference data using the new diagnosis object data. A diagnostic section (416) diagnoses the diagnosis object data based on the diagnosis reference data and determines whether an abnormality is present or not. If an abnormality is present, the fact is displayed to a user along with diagnosis results through an UI section (428).

Abstract: A solution of a chromium compound is impregnated into a silica-alumina carrier made of alumina and containing 1 to 5 weight % of silica relative to the weight of the carrier, thereby to obtain a decomposing catalyst carrying 10 to 15 weight % of chromium oxide relative to the weight of the catalyst in terms of Cr2O3. By contacting mixed gas obtained through partial oxidation of heavy oil and/or coal with the decomposing catalyst, COS and HCN contained in the mixed gas are decomposed/removed. In this case, transition of alumina into boehmite can be suppressed owing to coexistence of silica and chromium oxide, so that COS and HCN can be decomposed by highly active catalytic reactions over a long time.

Abstract: Provided is a diagnostic apparatus easily applied to diagnosis of a small lot product, etc. When measurement data on a measurement object is inputted sequentially, a filter section (408) performs filtering of the measurement data. When new measurement data is employed as diagnosis object data, a statistic processing section (420) updates diagnosis reference data using the new diagnosis object data. A diagnostic section (416) diagnoses the diagnosis object data based on the diagnosis reference data and determines whether an abnormality is present or not. If an abnormality is present, the fact is displayed to a user along with diagnosis results through an UI section (428).

Abstract: A method for removing sulfur compounds including transferring the impurity gas to a concentration process in which the impurity gas is separated into a concentrated gas containing hydrogen sulfide and a residual gas containing carbon dioxide, mercaptans and aromatic hydrocarbons: transferring the concentrated gas to a Claus reaction process in which hydrogen sulfide is recovered as an elementary sulfur, and an off-gas discharged from the Claus reaction process is heated to a temperature between the discharge temperature and 700° C.; introducing the heated off-gas into a mixing unit provided downstream of the heating means to be mixed with the residual gas; transferring a resultant mixed gas to a hydrogenation reaction process in which sulfur compounds are converted into hydrogen sulfide under the presence of a reduction catalyst; and separating the converted hydrogen sulfide and returning the separated hydrogen sulfide to the Claus reaction process.

Abstract: A solution of a chromium compound is impregnated into a silica-alumina carrier made of alumina and containing 1 to 5 weight % of silica relative to the weight of the carrier, thereby to obtain a decomposing catalyst carrying 10 to 15 weight % of chromium oxide relative to the weight of the catalyst in terms of Cr2O3. By contacting mixed gas obtained through partial oxidation of heavy oil and/or coal with the decomposing catalyst, COS and HCN contained in the mixed gas are decomposed/removed. In this case, transition of alumina into boehmite can be suppressed owing to coexistence of silica and chromium oxide, so that COS and HCN can be decomposed by highly active catalytic reactions over a long time.

Abstract: Carbonyl sulfide and/or hydrogen cyanide contained in a mixed gas are/is converted by contacting the mixed gas with an alkalized chromium oxide-aluminum oxide catalyst in the presence of steam, wherein the mixed gas and the steam at a volume ratio of 0.05≦steam/mixed gas≦0.3 are contacted with the alkalized chromium oxide-aluminum oxide catalyst at a gas hourly space velocity no less than 2000 h−1 at a temperature in the range of 150° C. through 250° C. In this case, the alkalized chromium oxide-aluminum oxide catalyst is set to have a grain size in the range of 1 mm through 4.5 mm. With this arrangement, since the surface area of a catalyst can be increased to a certain degree, the activity of the catalyst is increased to achieve the high processing speed, while since generation of a side reaction can be suppressed, lowering of the conversion rate of COS and/or HCN caused by the side reaction can be suppressed.