Process for removing hydrogen sulfide from sour gases

2:

• The process of claim 1, wherein the ZIF-67 particles have a mean particle size in a range of 5 to 150 nm.

4:

• The process of claim 1, wherein the ZIF-67 is supported on at least one support selected from the group consisting of a graphene-based material, an alumina, a carbon nanotube, an activated carbon, a metal organic framework (MOF), a zeolitic nanotube, and a covalent organic polymer (COP).

5:

• The process of claim 4, wherein the supported ZIF-67 has a delaminated structure comprising charged crystalline particles, in which a distance between laminated layers is in a range of 0.5 to 50 nm.

6:

• The process of claim 4, wherein the graphene-based material comprises at least one selected from the group consisting of graphene, graphyne, graphydiyne, graphene oxide, reduced graphene oxide, and exfoliated graphite.

7:

• The process of claim 4, wherein a weight ratio of the ZIF-67 to the support is from 20:1 to 1:20.

8:

• The process of claim 1, wherein the liquid comprises at least one selected from the group consisting of tap water, ground water, distilled water, deionized water, saltwater, hard water, fresh water, and wastewater.

9:

• The process of claim 1, wherein the reactor is a stirred tank reactor in the form of a vertical cylindrical reactor containing at least one propeller agitator disposed therein, wherein the vertical cylindrical reactor has a bottom portion, a vertically oriented cylindrical body portion and a top portion, wherein the bottom portion is cone shaped or pyramidal, wherein a plurality of recirculation tubes fluidly connects the bottom portion of the vertical cylindrical reactor with the body portion of the vertical cylindrical reaction.

10:

• The process of claim 1, wherein the H2S-containing gas composition is natural gas.

11:

• The process of claim 1, wherein the H2S-containing gas composition further comprises at least one gas selected from the group consisting of nitrogen, argon, methane, ethane, ethylene, propylene, propane, butane, butene, butadiene, and isobutylene.

12:

• The process of claim 1, wherein the H2S is present in the gas composition at a concentration in a range of 10 to 200 parts per million by volume (ppmv) based on a total volume of the gas composition.

13:

• The process of claim 1, wherein the H2S-containing gas composition is introduced to the reactor at a rate of 0.4 to 2.0 milliliters per minute (mL/min) per milligram of the ZIF-67.

14:

• The process of claim 1, wherein the ZIF-67 is present in the liquid at a concentration in a range of 0.1 to 10 milligrams per milliliter (mg/mL).

15:

• The process of claim 1, wherein during the introducing and adsorbing the ZIF-67 is in contact with the H2S-containing gas composition at a temperature in a range of from 15 to 40° C. and under a pressure of 0.9 to 1.2 bar.

17:

• The process of claim 16, wherein the cobalt salt is at least one selected from the group consisting of cobalt sulfate, cobalt acetate, cobalt citrate, cobalt iodide, cobalt chloride, cobalt perchlorate, cobalt nitrate, cobalt phosphate, cobalt triflate, cobalt bis(trifluoromethanesulfonyl)imide, cobalt tetrafluoroborate, cobalt bromide, and/or its hydrate.

18:

• The process of claim 16, wherein the imidazole compound comprises an imidazole of formula (I) and a benzimidazole of formula (II):
• wherein R1, R2, R3, R4, R5, R6, R7, and R8 are each independently selected from the group consisting of a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted alkoxy, a hydroxyl, a halogen, a nitro, and a cyano.