Distribution of some trace elements in the H-Coal process development unit☆

Abstract To understand better the distribution and fate of some trace elements in coal liquefaction plant operated in a continuous mode, a study of six typical trace elements—Cd, Pb, Cr, Cu, Mn and Ni—was initiated at the HRI-operated H-Coal Process Development Unit at Trenton, NJ. Sampling was carried out carefully and the analytical effort was designed to prevent sample contamination and produce precise analyses. The results show that the trace elements studied enter the plant and remain associated with the denser, less volatile materials. Under equilibrium conditions there does not appear to be a buildup in the PDU of those trace elements studied.