摘要:

An apparatus 1s described for measuring the viscosity of coal liquids at low temperature. Viscosity measurements have been obtained as a function of temperature for three SRC coal liquids down to a little above their pour points. Viscosity data shows straight line behavior on an ASTM D-341 chart as temperature 1s lowered. A simple prediction technique for this behavior has been proposed. Pour point temperature of the fuel aids definition of a low temperature limit of measurable viscosities.

ISSN:0884-3759    

DOI:10.1080/08843758608915797

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A simple mechanistic model for brown coal liquefaction has been developed and used in conjunction with data from PDU operation to examine the factors which contribute to hydrogen consumption. It is found that after allowing for hydrogen generation requirements, the maximum achievable refined product yield from Morwell brown coal ((ssuming a naphtha/middle distillate ratio of 5:6 together with refined product H/C ratios of 1.8 for naphtha and 1.5 for middle distillate) is 46 - 48%, corresponding to a hydrogen consumption of 6.6 - 7.6%. Alternatively, if consideration of hydrogen generation is excluded (as in pilot plant operation), the maximum yield would be around 54%, corresponding to 6.6% net hydrogen consumption. These results suggest that an aim of maximizing product yield by decreasing Cl-C4 gas formation may not be as desirable as at first thought.

ISSN:0884-3759    

DOI:10.1080/08843758608915798

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The naphtha fractions of coal hydrogenation products (IBP-130°C) were separated by successive extraction with potassium hydroxide solution. Basic oil was also separated from the residue. The extracted fractions were analyzed by H-NMR and FI mass spectroscopy. It is concluded that the consecutive extraction with dilute potassium hydroxide solution should be capable of fractional separation of acidic oil from coal oil and further separation of individual component may be done by increasing the consecutive extraction steps.

ISSN:0884-3759    

DOI:10.1080/08843758608915799

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Coal–derived middle distillate, boiling range 437 to 623°K, was hydrotreated in a fixed bed reactor with a commercial NiO–Mo03/ Al2O3catalyst. The feedstock contained predominantly highly–substituted aromatics. The product heteroatom content and aromaticity decreased with increased process temperature or pressure. Aromaticity was proportional to liquid space velocity. Heteroatonms could be effectively reduced at hydroprocessing conditions of 653°K, 10 MPa, and 2 WHSV. Experimentally–derived cetane number was found to be proportional to product aromaticity. Severe hydroprocessing conditions were required to produce diesel fuel of acceptable cetane number.

ISSN:0884-3759    

DOI:10.1080/08843758608915800

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Data from subsidence tests with coal–methanol and coal–coal 1iquid–methanol slurries are presented to suggest that coal liquids may serve to enhance the storage stability of coal–methanol slurry fuels. A two parameter system–the relative sediment height and the terminal sediment volume was used to characterize the compactness of coal sediments. The stability of coal–coal 1iquid–methanol slurries was found to depend upon the coal liquid content of the slurries. Addition of coal liquid to coal–methanol slurries caused coal particles to flocculate. These flocs form a loose, easily redispersed sediment bed which is very desirable from a practical point of view.

ISSN:0884-3759    

DOI:10.1080/08843758608915801

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The objective of this study was to survey several types of guard bed materials for their use in hydrotreating used motor oils. The feedstock originated from numerous automobile drainings and was first reclaimed at the National Institute of Petroleum and Energy Research. The effectiveness of the four different guard bed materials was determined by studying product, guard bed and catalyst properties. The candidate guard bed materials were all tested in experiments using a commercial hydrotreating catalyst in a standard, packed bed reactor. A temperature of 325°C (617°F), a pressure of 4583 kPa (665 psi), a liquid hourly space velocity of 1 h−1, and hydrogen flow rate of 748 std. M3/m3of oil (4200 SCF/BBL) were maintained throughout each of the experimental runs. Though all of the experimental runs, except the activated clay, produced an acceptable base stock color, the greatest improvement in all properties resulted from the use of the activated carbon. The activated carbon also proved to be the most protective of the catalyst bed. The only two materials that gave undersirable results were the activated clay and the alumina spheres.

ISSN:0884-3759    

DOI:10.1080/08843758608915802

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor