Porous Diatomite-Immobilized Cu–Ni Bimetallic Nanocatalysts for Direct Synthesis of Dimethyl Carbonate

Figure 6

(a) Dependence of 15% (2Cu–Ni)/diatomite performance on pressure (120°C, 600 h⁻¹ GHSV). (b) Dependence of 15% (2Cu–Ni)/diatomite performance on temperature (1.2 MPa, 600 h⁻¹ GHSV). (c) Dependence of 15% (2Cu–Ni)/diatomite performance on space velocity (1.2 MPa, 120°C). (d) Stability test of 15% (2Cu–Ni)/diatomite (120°C, 1.2 Mpa, 600 h⁻¹ GHSV). 2 g catalyst and 𝑛CH₃OH/𝑛CO₂ = 2/1 were used for all tests.