Hydrogenation process for coal direct liquefaction circulation solvent
A technology of circulating solvent and coal liquefaction, which is applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problem of inability to provide free hydrogen, save investment and operating costs, increase hydrogen supply, and homogenize temperature distribution.
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Embodiment 1~4
[0028] The self-made circulating solvent pre-hydrogenation special catalyst YZC-01 and the main hydrogenation special catalyst ZZC-02 were respectively loaded in two series-connected 600ml reactors according to the volume ratio of 1:1, and the hydrogenation test was carried out on the lignite liquefaction circulating solvent. The test conditions are shown in Table 1, and the comparison of raw oil and product properties is shown in Table 2.
[0029] Example
1
2
3
4
pressure, MPa
9.6
7.1
10.8
8.2
Inverse temperature, ℃
292
301
311
321
Secondary reaction temperature, ℃
323
341
350
360
Airspeed, h -1
0.3
0.2
0.25
0.25
Hydrogen oil ratio, v / v
65
85
95
130
[0030]The data in table 1 shows that in four examples, the highest pressure is 10.8MPa...
Embodiment 5
[0038] Example 5 uses the mixed products of Examples 1-4 as solvent to carry out lignite hot-melt catalysis test, and compares it with Example 6 which uses non-hydrogenated circulating solvent to carry out lignite hot-melt catalysis test. The tests were all carried out in an autoclave with a volume of 2000ml. After the reaction materials were installed, pressurize to the reaction pressure with nitrogen, control the pressure to be constant, and heat up the reaction under stirring. The test results are shown in Table 3.
[0039] Example
[0040] The data in Table 3 show that under the same ratio of agent to coal and reaction conditions, the non-hydrogenation solvent basically has no hydrogen donation effect, and the solvent undergoes condensation and coking reactions with the unsaturated substances produced by the pyrolysis of coal powder under the action of high temperature and pressure. It leads to the decrease of liquid and the increase of solid, except that the wate...
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