Coal hydrogenation and environmental health.

The first liquefaction of high-rank bituminous coals by preceding hydrogenation with homogeneous borane or iodine catalysts.

New Approach to Coal Structure through Its Evolution during Dry Catalytic Hydrogenation

Coal structure and its evolution in catalytic hydrogenation are studied in this work. The hydrogenation experiments were performed in tubing bomb reactors, in the absence of solvent, with an initial pressure of 10 MPa of H2, and for a reaction time of 30 min; iron sulfide was the catalyst precursor. The characterization of the solid residues was performed by different techniques, especially sol...

Molecular Catalytic Coal Liquid Conversion

In this Quarter, the research was focused continually on the two general tasks: Task 1, molecular organometallic catalysts for hydrogenation and Task 2, organic base catalysts for arene hydrogenation and the hydrotreating of the coal liquids. With regards to Task 1, the [ 1,5-HDRhCl] suffer catalyst system has been investigated in detail to improve its performance. In the presence of CTAB ([CTA...

Fischer-Tropsch Synthesis The CAER Perspective

The discovery of the catalytic synthesis of ammonia must rank as one of the important discoveries by mankind. In addition to providing the fertilizer needed to feed an expanding population, Fritz Haber’s recognition of recycle processing combined with the developing German technology to handle high pressures of hydrogen, led a major revolution in the chemical industry. In rapid succession, the ...

Toxic substances from coal energy: an overview.

Environmental concerns over increased coal consumption are fully justified by the past history of coal use. Although improved technology has provided some safeguards, increased utilization will require mining practices, emission control technologies, and waste disposal procedures that are not yet fully integrated into the routine use of the coal energy system. The Committee on Health and Evniro...