All issues
Successor
Volume 46, Issue 7
Displaying 1-7 of 7 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1967 Volume 46 Issue 7 Pages 507
Published: July 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (237K) -
JGC MRG (Methane Rich Gas) ProcessShohachi Egashira1967 Volume 46 Issue 7 Pages 508-513
Published: July 20, 1967
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSRecently in the gas industry, a great progress has been made in the gasification technique of petroleum hydrocarbons. Especially, the gasification process of light petroleum distillate by low temperature catalytic steam reforming under pressure has been recieving world wide attention as an economical process for the production of high calorific gas last few years.
This paper describes the progress of the development research, fundamental reactions, the outline of the JGC MRG process and the operation data obtained by the commercialized plant.View full abstractDownload PDF (804K) -
Disproportionation of PlopyleneSuehiko Yoshitomi1967 Volume 46 Issue 7 Pages 514-520
Published: July 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDisproportionation of propylen is the new catalytic process for production of ethylene and butenes. Butenes are converted to butadienes by dehydrogen-ation reaction. And ethylene manufactures are able to control worth of co-products by the new process. The catalyst for this process consisted of molybdenum oxide and cobalt oxide supported on alumina. The disproportionation of propylen is affected by temperature, space velocity (residence time), and other factors. This paper describes the equilibrium of reaction, catalysts, and process variables.View full abstractDownload PDF (805K) -
Futoru Yoshimura, Tuneo Yoshii1967 Volume 46 Issue 7 Pages 521-527
Published: July 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe mechanism of extraction of Yubari coal (C%86.5) with pyridine was studied below 95°C.
The determing step of the rate of extraction was the diffusion of soluble matter and the activation energy was 3.9-6.0 kcal/mole.
The cohesion energy of the coal was eveluated to be 12. 4 kcal/mole. It was seemed that the amount of extract for extracting temperature was related mainly to the degree of relaxation of the cohesion bond.
The alipphatic rich costituents were extracted selectively up to 30°C, and their amount were 70% to those of total extractable meterlials.View full abstractDownload PDF (684K) -
Hydrocracking of “Dry Solvent” under PressureEisuke Ogata1967 Volume 46 Issue 7 Pages 528-538
Published: July 20, 1967
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSThe hydrocracking of the “Dry Solvent” (b. p.151-193°C), the paraffinic refinery oil of the petroleum, was studied in a conventional fixed-bed down flow system over the temperature range from 300° to 500°C, and under pressure of 50 and 100 kg/cm2, in order to clarify the effect of carbon number of the hydrocarbon on the reactivities. The gasification of the “Dry Solvent” by hydrocraking was a little bit harder than that of hexane. The activities of the catalysts were in the same order as in the case of “Hexane”, i. e., nickel>> nickel-tungsten sulfide>> tungsten sulfide> molybdenum sulfide> silica-alumina. The nickel catalyst produced methane as a major product in-dependent of the degree of gasification, and only small amounts of the intermediate pro-ducts, such as ethane, propane, were formed. On the other hand, tungsten molybdenum and nickel-tungsten sulfide catalysts produce not only methane but other saturated hydro-carbons of the carbon number of two, three and four, as was observed in the hydrocracking of “Hexane”. The reaction path is expected to be the same irrespective of the difference of the carbon number. The decrease in the activity of the nickel-tungsten sulfide catalyst at the early stages was not observed. The main active site of this catalyst is co-existing point of nickel-and tungsten components. The addition of alkali decreases the surface area, resulting the decrease in the activity. The solid acid-character of the surface is expected to have little contribution to the hydrocracking reaction.View full abstractDownload PDF (1301K) -
Yoshinori Hino1967 Volume 46 Issue 7 Pages 539-554
Published: July 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSCoal is not homogeneous substance, but the mixture of particles which have different ash percent respectively. Therefore all characters of any coal should be offered with analytical content throughout all ash percent.
It is very worthy that it shows the regression equation between each character and ash, as generaly any original coal is divided into several goods which take different ash.
The author explained that there are many mistakes in the ordinary method de-pending on a measured value at one point of ash, when estimate the coalification degree, the nature of other ash coal or the constituents of ash.
The significant levels of these regression equations on same original coals are less than 1%, with exception of only a few.
Furthermore, the standard error of the estimate from any regression equation is almost less than the permissible difference of Jis on the proximate and ultimate analysis.
Therefore, almost all characters could be treated as the functione of ash content, so far as same original coals are examined, especialy on Japanese coals.View full abstractDownload PDF (1839K) -
1967 Volume 46 Issue 7 Pages 559-563
Published: July 20, 1967
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (674K)
- |<
- <
- 1
- >
- >|