Deactivation of a coal liquefaction catalyst

✍ Scribed by Tiejun Zhang; Paul D. Jacobs; Henry W. Haynes Jr; April J. Swanson

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 712 KB
• Volume: 74
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(95)93478-v

✦ Synopsis

A commercial coal liquefaction catalyst, Amocat lA, has been subjected to a deactivation study in a laboratory catalytic coal liquefaction microreactor. Carbonaceous and metal deposits were the two major factors causing catalyst deactivation. The carbonaceous material deposited primarily in the interior of the catalyst particle and clogged the pores in a uniform manner. The metals deposit was rich in calcite and deposition was mostly restricted to the external surface of the catalyst particle. It appears that either mechanism operating alone will completely deactivate the catalyst after processing roughly 1000 weights of coal per weight of catalyst.

% conversion = g of (maf coal + residuum -prod residue) x loo g of (maf coal + residuum)

Marerials

Preparation of the coal paste was described earlier4. The paste is composed of three weights of as-received pulverized coal from Arco's Black Thunder mine in the Powder River Basin, Wyoming, one weight of deashed residuum material derived from this same coal at the