巻号一覧
後続誌
61 巻, 6 号
選択された号の論文の8件中1～8を表示しています
- |<
- <
- 1
- >
- >|
-
藤原 輝男1982 年 61 巻 6 号 p. 359
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (274K) -
藤元 薫1982 年 61 巻 6 号 p. 360-369
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーTechnologies of H-Coal process which is one of three Major coal liquefaction process in U. S. were reviewed in detail. The present status of the 600t/d pilot plant which is now in operation at Catlettsburg, Kentucky is also reported.
The process is developed from H-Oil process which has been commercialized for up grading residual oils and utilized an ebbulating bed of Co-Mo or Ni-Mo cata-lyst. Bituminous or subbituminous coals are liquefied at about 450°C and at 200 bar to produce low sulfur naphtha and low sulfur fuel oil.
The pilot plant which can handle 600t/d of coal has been operated since 1980 and a continuous operation of about 130 days was achieved at the end of 1981. Many tech-nical problems including solvent balance, slurry charge pump, pressure let-down valve, block valve, corrosion and pipe pluggings are clarified and most of them are solved.抄録全体を表示PDF形式でダウンロード (2264K) -
大嶋 哲夫1982 年 61 巻 6 号 p. 370-382
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーPulverized coal combustion has been used since 1920s when it was first adopted in a U.S. boiler, and is the most common selection for high capacities.
Japan, which is highly dependent to imported oil, is now rapidly being switched to coal.
Coal characteristics greatly influence on coal-burning and steam-generating equip-ment design and environmental pollution control. Coal has remarkably broad properties. Therfore, coal to be used should be tested or analized beforehand with regard to grindability, abrasiveness of coal and ash, combustion characteristics, ash slagging and fouling, pollutant emission such as dust, SOχ and NOχ, and so forth.
This paper primarily describes influence of coal properties on boilers, advanced denitrification technologies and combustion test facility. It also refers to coal dust explosion and safety.抄録全体を表示PDF形式でダウンロード (2002K) -
鈴木 孝弘, 石田 愈1982 年 61 巻 6 号 p. 383-389
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーHeats of formation ΔHf°C and absolute entropies S° of coal-derived liquids are essential thermodynamic properties to perform energy and exergy analyses of liquefaction processes of coal. A method to estimate them based on the group-contribution method is proposed. In this method only elemental composition CHxOyNz and the normal boiling point should be given. By applying this new method and the SPEED (Structured Process Energy-Exergy-flow Diagram), the exergy analysis for a coal liquefaction process is performed.抄録全体を表示PDF形式でダウンロード (777K) -
河井 隆伸, 川島 徳道, 目黒 謙次郎, 本田 英昌, 山田 泰弘1982 年 61 巻 6 号 p. 390-396
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーTetralin has been employed to liquefy coals as a hydrogen donor vehicle in spite of its weak solvent power for coals. Meanwhile, 1, 2, 3, 4-tetrahydroq-uinoline (THQ) partially reduced quinoline has not only as high solvent power for coals like quinoline, but also has hydrogen donating property. Furthermore, THQ is considered to be a liquid catalist concerned with hydrogen transfer. The reactions of coal liquefaction in tubing-bomb reactor with tetralin or THQ as a hydrogen donor vehicle under autogenous condition at 400°C were conducted. The relation between coal rank and vehicle (tetralin, THQ) on liquefaction of coals was studied.
The principal results were as follows;
1) The conversion to preasphaltene was not so different either in tetralin or in THQ.
2) The effect of conversion to asphaltene in THQ was larger than in tetralin.
3) In THQ, it was enable to convert coals to asphaltene more than 80% within 10min. in case of coal rank under daf C% 80.
These results support that THQ is more powerful and active vehicle than tetralin.抄録全体を表示PDF形式でダウンロード (720K) -
炭化水素ガスの発生状況鈴木 俊光, 三嶋 優, 伊藤 真樹, 渡部 良久, 武上 善信1982 年 61 巻 6 号 p. 397-404
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーRapid heating rate (-100°C/sec) pyrolysis studies of three different coals and two vacuum residues were carried out. Yields of total hydrocarbon gases (C1-C4) from coals increased gradually above temperature 450°C and amounted to about 5-8wt% above 850°C. Methane was the main component of the hydrocarbon gases formed and amounted to 70% of total hydrocarbon gases. Remarkable increases in the yield of hydrocarbon gases were observed in both temperature ranges of 500-550°C and 700-800°C. This corresponded to the increase in methane, ethylene, and propylene in these temperature ranges. Hydrogen, carbon monoxide, and carbon diox-ide were also observed above 500°C and these amounts increased with increasing pyro-lysis temperature. In the pyrolysis of vacuum residues of crudes, yields of C1-C4 hydrocarbon gases increased with increasing pyrolysis temperature, and ethylene was the main product. Among the two residues, a yield of C1-C4 hydrocarbon gases from Taching vacuum residue was higher, reflecting that Taching vacuum residue contains longer paraffinic straight chains than Iranian heavy's.抄録全体を表示PDF形式でダウンロード (981K) -
富田 彰, 玉井 康勝1982 年 61 巻 6 号 p. 405-410
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーLeaching of various metals from stockpile of coal or coal ash might be a potential problem for Japan which is now attempting to increase the consumption of coal as a substitutional energy source for petroleum.
Leaching of some coals and ashes was carried out by using four buffer solutions with different pHs. Among various types of ashes from Taiheiyo coal, a slag which was once melted at 1620K was found to be most stable for leaching with a solution of pH5.6, followed by a raw coal and a residual char after steam gasification. From both a high temperature ash and a low temperature ash, a considerable amount of Ca and Mg was leached out at pH5.6. The extent of leachability depended on the presence of surrounding matrix and also on the porosity of the solid. Toxic elements like Be, Cd and Hg were almost absent in the leached solution. With decreasing pH, a great deal of Al and Fe appeared, whereas they were not found in a solution of pH5.6. Even from a slag, many metal ions were leached out to a solution of pH2.2. The composition of solution depended upon the type of coal used, and it could be anticipated from the elemental composition of mineral matters originally present in coal.抄録全体を表示PDF形式でダウンロード (664K) -
COMに関する研究 (II)荻野 圭三, 阿部 正彦, 赤堀 直人, 北原 文雄, 川島 徳道, 目黒 謙次郎, 本田 英昌1982 年 61 巻 6 号 p. 411-420
発行日: 1982/06/20
公開日: 2010/06/28
ジャーナル フリーThis paper describes the effect of size composition and kinds of coal on the preparation of low ash COM (Coal Oil Mixture). When COM is burned in boiler, the ash in the COM results in some hindrance. Primarily, Taiheiyo coal, Miike coal and Hongei coal containing ash were ground by a wet ball mill in 1N aque-ous HCl solutions. Secondarily, fuel oil-A and the coal aqueous slurry by grinding in the 1N aqueous HCl solution were setting in homogenizer, then the coal particles were flushing from the water phase into oil phase.
Further, the COM was given by mixing of coal oil agglomerate performed with fuel oil-A.
The mineral matter from Taiheiyo coal and Miike coal particles remains in the water phase, in each process. On the other hand, the mineral matter in Hongei coal was scarcely removed at the grinding process, but by the flushing the mineral matter was considerably removed.
To give easy-handling coal oil agglomerate, the optical quantity of fuel oil-A was varied on each kinds of coal.
The viscosities of the COM of Taiheiyo coal and Hongei coal were considerably depended on the size composition of coal, however, that of Miike coal was scarcely depended on the size composition of coal.
The stability of the COM was also depended on kinds of coal and size composi-tion of coal, however, every COM in case of using the coal (200 mesh pass, after 24 hours grinding) was stable during 1 month, regardless of kinds of coal.抄録全体を表示PDF形式でダウンロード (1594K)
- |<
- <
- 1
- >
- >|