Purification Technology Edition: Daily Question [2017-11-14]
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What are the main hazards of sulfides in methanol production? Answer: ① Poison the catalyst, causing it to become poisoned and inactive. In methanol production, hydrogen sulfide can permanently poison the methanol catalyst, reducing its activity and leading to a decrease in methanol production. This is because hydrogen sulfide reacts with the copper in the copper-based catalyst to form cuprous sulfide, thereby rendering the catalyst inactive. ②Corrode equipment. In the presence of moisture, gases containing hydrogen sulfide dissolve in water to form hydrosulfuric acid, which can react with metal equipment and pipes to produce corresponding metal sulfides, thereby causing corrosion. The degree of corrosion increases as the partial pressure of hydrogen sulfide in the gas rises. ③Pollute the environment. Hydrogen sulfide is a highly toxic substance; even small amounts inhaled by the human body can cause symptoms such as headaches and dizziness, while larger inhalations can lead to sudden death. In the air released from vents or gases leaking from equipment and pipelines, hydrogen sulfide settles on the ground, causing varying degrees of environmental pollution. **Industrial hygiene standard: <10mg/m3.
It causes catalyst poisoning and deactivation, corrodes equipment, and pollutes the environment
①Poisoning the catalyst. ②Corrode equipment. ③Pollute the environment.
①Poison the catalyst, causing it to become poisoned and inactive. In methanol production, hydrogen sulfide can permanently poison the methanol catalyst, reducing its activity and leading to a decrease in methanol production. This is because hydrogen sulfide reacts with the copper in the copper-based catalyst to form cuprous sulfide, thereby rendering the catalyst inactive. ②Corrode equipment. In the presence of moisture, gases containing hydrogen sulfide dissolve in water to form hydrosulfuric acid, which can react with metal equipment and pipes to produce corresponding metal sulfides, thereby causing corrosion. The degree of corrosion increases as the partial pressure of hydrogen sulfide in the gas rises. ③Pollute the environment. Hydrogen sulfide is a highly toxic substance; even small amounts inhaled by the human body can cause symptoms such as headaches and dizziness, while larger inhalations can lead to sudden death. In the air released from vents or gases leaking from equipment and pipelines, hydrogen sulfide settles on the ground, causing varying degrees of environmental pollution. **Industrial hygiene standard: <10mg/m3.
①Poison the catalyst, causing it to become poisoned and inactive. In methanol production, hydrogen sulfide can permanently poison the methanol catalyst, reducing its activity and leading to a decrease in methanol production. This is because hydrogen sulfide reacts with the copper in the copper-based catalyst to form cuprous sulfide, thereby rendering the catalyst inactive. ②Corrode equipment. In the presence of moisture, gases containing hydrogen sulfide dissolve in water to form hydrosulfuric acid, which can react with metal equipment and pipes to produce corresponding metal sulfides, thereby causing corrosion. The degree of corrosion increases as the partial pressure of hydrogen sulfide in the gas rises. ③Pollute the environment. Hydrogen sulfide is a highly toxic substance; even small amounts inhaled by the human body can cause symptoms such as headaches and dizziness, while larger inhalations can lead to sudden death. In the air released from vents or gases leaking from equipment and pipelines, hydrogen sulfide settles on the ground, causing varying degrees of environmental pollution. **Industrial hygiene standard: <10mg/m3.
Sulfides can poison methanol synthesis catalysts
①Poison the catalyst, causing it to become poisoned and inactive. In methanol production, hydrogen sulfide can permanently poison the methanol catalyst, reducing its activity and leading to a decrease in methanol production. This is because hydrogen sulfide reacts with the copper in the copper-based catalyst to form cuprous sulfide, thereby rendering the catalyst inactive. ②Corrode equipment. In the presence of moisture, gases containing hydrogen sulfide dissolve in water to form hydrosulfuric acid, which can react with metal equipment and pipes to produce corresponding metal sulfides, thereby causing corrosion. The degree of corrosion increases as the partial pressure of hydrogen sulfide in the gas rises. ③Pollute the environment. Hydrogen sulfide is a highly toxic substance; even small amounts inhaled by the human body can cause symptoms such as headaches and dizziness, while larger inhalations can lead to sudden death. In the air released from vents or gases leaking from equipment and pipelines, hydrogen sulfide settles on the ground, causing varying degrees of environmental pollution. **Industrial hygiene standard: <10mg/m3.
Polluting the environment causes direct harm to human health
Answer: ① Poison the catalyst, causing it to become poisoned and inactive. In methanol production, hydrogen sulfide can permanently poison the methanol catalyst, reducing its activity and leading to a decrease in methanol production. This is because hydrogen sulfide reacts with the copper in the copper-based catalyst to form cuprous sulfide, thereby rendering the catalyst inactive. ②Corrode equipment. In the presence of moisture, gases containing hydrogen sulfide dissolve in water to form hydrosulfuric acid, which can react with metal equipment and pipes to produce corresponding metal sulfides, thereby causing corrosion. The degree of corrosion increases as the partial pressure of hydrogen sulfide in the gas rises. ③Pollute the environment. Hydrogen sulfide is a highly toxic substance; even small amounts inhaled by the human body can cause symptoms such as headaches and dizziness, while larger inhalations can lead to sudden death. In the air released from vents or gases leaking from equipment and pipelines, hydrogen sulfide settles on the ground, causing varying degrees of environmental pollution. **Industrial hygiene standard: <10mg/m3.
①Poisoning the catalyst. ②Corrode equipment. ③Pollute the environment.
1. Cause catalyst poisoning； 2. Causes corrosion to pipes and equipment ； 3. It leads to a decline in the quality of crude methanol