Effects of dispersed Mo catalysts and H{sub 2}O addition on hydrogenation and hydrocracking of 4-(1-naphthylmethyl)bibenzyl
- Pennsylvania State Univ., University Park, PA (United States)
Recent research in our group has demonstrated a strong synergistic effect between a dispersed Mo sulfide catalyst and water in low-severity coal liquefaction reaction. This paper reports our results on the effects of dispersed Mo catalysts and H{sub 2}O addition on hydrogenation and C-C bond hydrocracking of 4-(1-naphthylmethyl)bibenzyl, abbreviated as NMBB. Batch studies in micro reactors at 350 and 400{degrees}C for 30 min (initial cold H{sub 2} pressure of 6.9 MPa) revealed that active catalysts can be generated in situ from either ammonium tetrathiomolybdate (ATTM) or Mo(CO){sub 6} under the reaction conditions (350 or 400{degrees}C, 30 min), with the main catalysis of the latter for NMBB hydrogenation, but the former for C-C bond cleavage. Water may have strong promoting effect on NMBB conversion in catalytic runs, depending on the conditions. At 350{degrees}C a 50% increase in NMBB conversion was observed upon H{sub 2}O addition to the run using ATTM (1 wt% Mo) as catalyst. However, at 400{degrees}C no major difference in conversion or product distribution was found. Runs of NMBB at 350{degrees}C using Mo(CO){sub 6} lead to tetrahydro-NMBB-derivatives and few cleavage products. Water added to Mo(CO){sub 6} suppressed hydrogenation. The combination of Mo(CO){sub 6} and S lead to almost complete conversion of NMBB. A run with Mo(CO){sub 6}/S/H{sub 2}O gave similar results. It appears that water can increase NMBB conversion with metal sulfide catalysts within a certain temperature range.
- OSTI ID:
- 214796
- Report Number(s):
- CONF-950801-; TRN: 96:000922-0269
- Resource Relation:
- Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
- Country of Publication:
- United States
- Language:
- English
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