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Capture mass composed of elemental sulphur deposited on porous support for capturing heavy metals

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: 2014-01-15
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 mass composed of elemental sulphur deposited on porous support for capturing heavy metals
  • Capture mass composed of elemental sulphur deposited on porous support for capturing heavy metals
  • Capture mass composed of elemental sulphur deposited on porous support for capturing heavy metals

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:

[0119] Put 10 g of alumina int...

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] Prepare the solution 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 absorption volume of 600 g of the carrier.

[0132] Preparation of capture block:

[0133] capture block M 2 Prepared by dry impregnation using 240 mL of the abo...

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 impregnation by contacting 432 mL of ...

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Abstract

The application relates to a capture mass composed of elemental sulphur deposited on a porous support for capturing heavy metals. The present invention concerns the elimination of the heavy metals, in particular mercury and possibly arsenic and lead, present in a dry or moist gaseous effluent (1) by means of the capture mass (2) comprising the 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 Applications(China)
IPC IPC(8): B01D53/04
CPCB01D2255/20715B01J20/0266B01D2256/245B01D2253/31B01J20/28071B01D2253/1124B01D2256/24B01D2251/304B01J20/3234B01D2257/80B01D2253/106B01D2257/602B01J20/08C07C7/12B01D53/261B01D53/64B01D2253/108B01D2258/0283B01D53/82B01D2252/2023B01J35/1061B01D2253/104B01D2253/306B01J21/04B01J35/1038B01J20/2808B01J2220/56B01D53/263B01J27/04B01D2253/311B01D2255/20707B01J35/1057B01D2257/60B01J37/0207B01J35/108B01J35/1066B01J20/28083B01D2251/608B01J35/651B01J35/633B01J35/66B01J20/0248
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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