Capture block consisting of elemental sulfur deposited on a porous support for heavy metal capture
A technology of porous carrier and elemental sulfur, which is applied in the processing of synthesis gas or natural gas, and in the field of gas, which can solve the problems of entrainment of active phase and decrease of service life of capture block
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Embodiment A
[0109] Example A: Capture block M according to the invention 1 preparation of
[0110] capture block M 1 Prepared using a mixture of alumina beads and solid powdered elemental sulfur.
[0111] Description of the carrier:
[0112] The support was flashed alumina prepared by granulation with the characteristics mentioned in Table 1:
[0113]
value
Na 2 O (ppm)
3450
BET surface area (m² / g)
321
V 0.004 (mL / g)
0.14
V 0.002 (mL / g)
0
V 0.01 (mL / g)
0.30
V 0.1-0.01 (mL / g)
0.10
TPV* (mL / g)
0.46
WTV** (mL / g)
0.4
[0114] Table 1
[0115] *TPV = total pore volume.
[0116] TPV was determined using the following calculations: measure particle density (Dg) using a mercury porosimeter and measure absolute density (Dab) using a helium pycnometer, then calculate TPV (mL / g) as 1 / Dg - 1 / Dab.
[0117] ** WTV = water absorption volume
[0118] WTV is determined experimentally: ...
Embodiment B
[0124] Example B: Capture block M according to the invention 2 preparation of
[0125] capture block M 2 Prepared by dry impregnation of alumina beads with a solution containing a sulfur emulsion.
[0126] Description of the carrier:
[0127] The support was flashed alumina prepared by granulation with the characteristics mentioned in Table 2:
[0128]
value
Na 2 O (ppm)
3450
BET surface area (m² / g)
321
V 0.004 (mL / g)
0.14
V 0.002 (mL / g)
0
V 0.01 (mL / g)
0.30
V 0.1-0.01 (mL / g)
0.10
TPV (mL / g)
0.46
WTV (mL / g)
0.4
[0129] Table 2.
[0130] Solution preparation:
[0131] The solution was prepared by mixing 60 g of sulfur in the form of an emulsion in water to obtain a solution with a volume equal to 240 mL, corresponding to the water uptake volume of 600 g of the carrier.
[0132] Preparation of capture block:
[0133] capture block M 2 Prepared by dry imp...
Embodiment C
[0135] Example C: capture block M 3 preparation (comparison)
[0136] capture block M 3 Prepared by dry impregnation of alumina beads with a solution containing a sulfur emulsion.
[0137] Description of the carrier:
[0138] The support was flashed alumina prepared by granulation with the characteristics mentioned in Table 3:
[0139]
value
Na 2 O (ppm)
300
BET surface area (m² / g)
153
V 0.004 (mL / g)
0.03
V 0.002 (mL / g)
0
V 0.01 (mL / g)
0.18
V 0.1-0.01 (mL / g)
0.23
TPV (mL / g)
0.91
WTV (mL / g)
0.72
[0140] table 3.
[0141] Solution preparation:
[0142] The solution was prepared by mixing 45 g of micronized sulfur in the form of an emulsion in water to obtain a solution with a volume equal to 432 mL, corresponding to the water absorption volume of 600 g of the carrier.
[0143] Preparation of capture block:
[0144] capture block M 3 Prepared by dry impre...
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