97/01903 Factors affecting phosphate rock dissolution in acid soil amended with liming materials and cellulose

• Publisher: Elsevier Science
• Year: 1997
• Weight: 198 KB
• Volume: 38
• Category: Article
• ISSN: 0140-6701
• DOI: 10.1016/s0140-6701(97)87819-8

✦ Synopsis

The authors carried out catalytic hydrocracking of a residue from deasphalting a syn-crude, obtained by direct coal liquefaction of a subbituminous Spanish coal, at different temperatures and reaction times. Kinetic study of the cracking reaction has been performed. The viscosity, coke content, boiling point distribution, elemental analysis, and aromaticity of the reaction products were determined.

The experimental data were in good agreement with the first-order kinetic model proposed.

97101891

Catalytic properties of low and high temperature xylene isomerization catalysts based on ZSM-5 zeolite Smieskova, A. et al. Pet. Coal, 1996, 38, (2), 38-40 Cx aromatic hydrocarbon isomerization was carried out on activated (480", 450" hydrogen flow) Ni-exchanged ZSM 5 zeolite catalysts at 260-420". Pure ethylbenzene isomerization was studied to elucidate the mechanism of the reaction. Temperatures of >400" favour ethylbenzene conversion by dealkylation.

97101892

Char nitrogen: effect of coal type pore structure on NO/N20 evolution