All issues
Successor
Volume 55, Issue 3
Displaying 1-7 of 7 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1976 Volume 55 Issue 3 Pages 131-132
Published: March 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (263K) -
Hiroshi Uenoyama, Kenichi Hayakawa1976 Volume 55 Issue 3 Pages 133-142
Published: March 20, 1976
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSThe MORETANA absorber is equipped with perforated trays of extremely simple construction for bringing liquid and gas into vigorous contact with each other.
The perforated trays in the MORETANA absorber have been designed with optimum hole openings, hole size and liquid-gas ratio. As the liquid-gas flow conditions in the MORETANA absorber are distinctly different from those of conventional absorbers, the gas space velocity is 4.5 to 5 m/sec and the mass transfer efficiency is of a very high order. The MORETANA absorber thus enables the treatment of 2 to 7 times more gas than conventional absorbers.
Especially when used in flue gas desulfurization units, the MORETANA absorber ensures a 95 to 99% SOx elimination rate, even with absorbents such as NaOH and lime. Besides, tbe MORETANA absorber is not prove to scaling or clogging of solidsowing to the “self-induced washing effect” provided by the vigorous mixing of gas and liquid though such phenomena are often found in conventional absorbers using slurry fluid.
Using a MORETANA absorber having the above performance, more than 90% of NOx is also eliminated simultaneously.
In the the MORETANA process, NO is oxidized by means of Cl O2 or O3 (converted to NO2) and recovered very effectively as N2 by means of sulfite generated through desulfurization reaction.
2NO+ClO2+H2O→NO2+HNO3+HCl
NO+O3→NO+O2
NO2+2NaSO3→1/2N2+2Na2SO4
NO2+2 (NH4) 2SO3→1/2N2+2 (NH4) 2SO4
NO2+2CaSO3→1/2N2+2CaSO4
As actual cases of application of the MORETANA process, four (4) industrial plants are performing satisfactorily and two (2) plants are now under construction.View full abstractDownload PDF (1174K) -
Paul M. Yavorsky, [in Japanese]1976 Volume 55 Issue 3 Pages 143-153
Published: March 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1468K) -
A Study on the Simulation Model of Steam Cracking Reaction of NaphthaArimasa Baba, Shozo Itoh, Toshiaki Umaki, Kaoru Satoh1976 Volume 55 Issue 3 Pages 154-163
Published: March 20, 1976
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSAn equilibrium relation is established between products which are formed by cracking hydrocarbon in accodance with each reaction temperature. Therefore it is possible to caluculate the composition and the properties under each reaction temperature.
But in order to calculate them, an intricate multi-dimentional equilibrium equation or the system using a computer, in which numerical values are programmed in advance, it nesessary.
we noticed that the composition of the final formation gas which is produced by gasificating hydrocarbon, consists of H2, CO and CO2 and we deviced a remarkably brif method of calculation compared with the past one considering the material balance which provides the number of formative mol of hydroarbon (NH2) for the parameter and the equilibrium relation of PCO2, PH2/PCO, PH2O. From the above results, we made out a simulation model and proved that this method of analysia is practically procise in contrast with values gained by our small scale experiment equipment.
This simulation model, we made out, can be utilized for designing of experiment equipments, selection of reaction condition and forecast of reaction results, in case that a different kind material oil is used.View full abstractDownload PDF (1099K) -
Coking Behaviours of Heavy Oil-Coke BlendsJunjiro Kumai, Kiyoshi Yamaguchi, Katsuhisa Maruyama, Hideo Kimura, Yu ...1976 Volume 55 Issue 3 Pages 164-172
Published: March 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSInvestigation on coking behaviours of heavy oil-coal blends has been done by means of solvent extraction, the measurements crusible swelling number (CSN), volatile (VM), microstrength index (MSI) and polarized-light microscopic observations. Pitches were prepared from several heavy oils, which are virgin reduced crudes, sand oil and thermal tar as starting materials, by heat-treating at a temperature range of 350-580°C.
It is found that the pitches processed at a critical conditions show swelling behaviours similar to those of coking coal during coking. Compatibility between the pitches and coking coals is recognized, but not recognized for non-coking coal blends. From these results obtained here, the application of heavy oil for metallugical coke manufacturing becomes possible.View full abstractDownload PDF (1251K) -
The Influence of Coal Ranks on the Solvolysis ReactionKazuteru Osafune, Seiji Arita, Yasuhiro Yamada, Hitoo Kakiyama, Hidema ...1976 Volume 55 Issue 3 Pages 173-181
Published: March 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe present paper deals with the solvolysis reaction of coal with petroleum vacuum residue. Various kinds of coal samples (C: 66.3-90.1%) were examined, and Khafji vacuum residue was used as a solvent.
Coal powder was mixed with Khafji vacuum residue, and the mixture was heattreated (350-430°C) for several hours. During the heat-treatment, a considerable amount of gas and oil evolved, and pitch-like meterial (hereafter we call solvolysis pitch) was resided. After heat-treatment, the solvolysis pitch was extracted with ordinaly kinds of organic solvent, such as quinoline, pyridine. The following conclusions can be drawn by present study.
(1) Coal can be solubilized through the solvolysis reaction with the petroleum vacuum residue.
(2) In the case of Miike Coal (C: 82.9%), the amounts of quinoline insolble matter reach a minimum at 390°C for the solvolysis pitch obtained from a mixture of one part of coal and two parts of the petroleum residue. Miike coal can be almost solubilized when heat-treated with the equal weight of petroleum residue at 390°C.
(3) Pittsburg coal (C: 81.4%) and Miike coal were found to be most suitable ones among the coals examined for solvolysis.
(4) Micrographic textures of the solvolysis pitches are strongly dependent on the carbon content of coal used.View full abstractDownload PDF (1849K) -
Shinzo Hirasawa1976 Volume 55 Issue 3 Pages 182-190
Published: March 20, 1976
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe purpose of this paper is to present a summary of the patents unveiled in 1974 about NOx control for stationary sources and to discuss in detail ongoing control technology development activities.
(1) Patent Applications Tendency The 108 total patent applications were made in 1974. The many of them aimed at the modifications of equipment design features.
(2) Ongoing Technology Development Activities In the main the low NOx emission burners are being developped about either controlling thermal NO or controlling fuel NO.View full abstractDownload PDF (1491K)
- |<
- <
- 1
- >
- >|