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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

Active Publication Date: 2018-03-30
INST FR DU PETROLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] In addition, capture blocks based on sulfur deposited on activated carbon very often suffer from stability problems under wet conditions, since active phases can be entrained in the presence of water or liquid hydrocarbons.
This property, linked to the weak energy interaction existing between the active phase and the surface of the activated carbon and the solubility of sulfur in this medium, leads to a drastic reduction in the service life of the capture block

Method used

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  • Capture block consisting of elemental sulfur deposited on a porous support for heavy metal capture
  • Capture block consisting of elemental sulfur deposited on a porous support for heavy metal capture
  • Capture block consisting of elemental sulfur deposited on a porous support for heavy metal capture

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The present invention concerns the elimination of heavy metals, in particular mercury and possibly arsenic and lead, present in a dry or moist gaseous effluent (1) by means of a capture mass (2) comprising a porous support at least part of which is of low mesoporosity and an active phase based on sulphur. The invention is advantageously applicable to the treatment of gas of industrial origin, synthesis gas or natural gas.

Description

technical field [0001] The present invention relates to the removal of heavy metals, in particular mercury and possibly arsenic and lead, present in dry or wet gaseous effluents by means of a capture mass comprising at least a portion of a porous carrier, and an active phase based on elemental sulfur. The invention is advantageously applicable to the treatment of gases of industrial origin, synthesis gas or natural gas. Background technique [0002] Mercury is a metallic pollutant that is found in gaseous or liquid hydrocarbons produced in many regions of the world such as the Gulf of Niger, South America, North Africa or Asia Pacific. [0003] The removal of mercury from hydrocarbon cuts is industrially desirable for several reasons: [0004] · operator safety, as elemental mercury is volatile and presents a serious neurotoxic hazard due to inhalation, while organic forms of mercury present similar hazards due to skin contact; [0005] • And for reasons of preventing dea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04
CPCB01D53/261B01D53/263B01D53/64B01D53/82B01D2251/304B01D2251/608B01D2252/2023B01D2253/104B01D2253/106B01D2253/108B01D2253/1124B01D2253/306B01D2253/31B01D2253/311B01D2255/20707B01D2255/20715B01D2256/24B01D2256/245B01D2257/60B01D2257/602B01D2257/80B01D2258/0283B01J20/0266B01J20/08B01J20/28071B01J20/2808B01J20/28083B01J20/3234B01J27/04B01J35/1038B01J35/1066B01J35/108B01J37/0207B01J2220/56B01J20/0248C07C7/12
Inventor F.波尔舍龙K.巴尔特莱A.博多M-A.莱利亚A.尼古洛T.阿尔马罗利C.朱班
Owner INST FR DU PETROLE
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