The extraction and Rock-Eva1 pyrolysis of oil sands from Karamay and Erlian were investigated. Elemental, group and distillation analyses were carried out. Bitumen from Karamay oil sand has lower contents of resin, asphaltenes and sulfur than that from Erlian. The effects of various variables on bit
Study of extraction and pyrolysis of Jordan tar sand
โ Scribed by Yahya H. Khraisha
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 77 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0363-907X
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โฆ Synopsis
The extraction and pyrolysis of tar sand from Wadi Isal, Jordan have been investigated. Solvent type, mixing time, temperature, particle size and alkali concentration have been identi"ed as important parameters for bitumen recovery. The results show that hot water extraction is ine!ective since a small amount of bitumen has been obtained even at 803C. Kerosene extraction shows a maximum bitumen recovery of about 43% at 803C and 180}250 m particle size. The kinetic parameters of pyrolysis have been determined based on "rst-order rate expression and their values were in agreement with other published data in the literature.
๐ SIMILAR VOLUMES
The kinetics of chloroform extraction from a Jordan tar sand have been studied. The activation energy of the extraction has been evaluated; for 125-180 m tar sand it is 6โข53 kJ mol\ in the initial stage of extraction and 12โข18 kJ mol\ in the later stages, for 355-500 m 1โข0 kJ mol\ and 10โข61 kJ mol\,
Thermal cracking of tar-sand bitumens has been carried out using a two-stage pyrolysis reactor with temperature zones of 440ยฐC and 750-600'%, respectively. Feedstocks were pyrolysed in the first stage into cracked oils, which were carried to the second stage for subsequent pyrolysis. Only 12-l 4 wt%