The preparation conditions to obtain cobalt-nickel monolithic catalyst with high loading and homogeneous distribution are studied. Washcoating of raw monolith with gamma alumina solution was examined and characterized by SEM. A uniform layer of alumina washcoat as a support for active phase was achieved in this process. Also the effect of the molarity of solution and the number of impregnation were studied to obtain different loading of active phase on monolith walls. Catalysts with 38.81, 20.44 and 3.22 wt.% of loading were obtained by four steps of impregnation in active phase solution with 3.33, 1.42, 0.3 of molarity, respectively. It was found that increase in concentration of active phase loading leads to increase in active phase loading but reduces the uniformity of active phase distribution.

Field and laboratory work sponsored by t h e Cas Research Xnstituto (Cat) 8nd the Department of Energy (WE) have shown t h a t calcium-carbonate scale formation in waters produced with natural gas and o i l can be preventod by injection of phosphonate inhibitor i n t o t h e tomation, even i t h e fornration is sandstone without calcite binding material. c a r r i e d out on DOE'S geopressured-geothermal Gladys Hccall brine-gas well and CRI's to-production wells in the Hitchcock f i o l d .

Catalytic decomposition of hydrazine over Ir/γ‐Al2O3 was investigated using catalysts with different Ir content. The catalysts were characterized by XRD, XRF, BET, and TEM. Results indicated that with increasing Ir content from 5.6 to 40.8 wt%, the BET surface area and pore volume decreased. This decrease was more significant when Ir content increased from 34.3 to 40.8 wt%. Reactor tests also indicated that the maximum stable reactor pressure of 2180 kPa with the time of about 400 milliseconds to obtain this pressure, and the lowest catalyst loss of 11.3 wt% were obtained with 34.4 wt% Ir as optimum Ir loading.