Methanol Purification Version – One Question per Day 20200613
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Comparison of the use and performance of copper-based catalysts and zinc-chromium catalysts: Answer: Listed as follows: Item, Zinc-based catalyst, Copper-based catalyst; Preparation method, Precipitation, oxide mixing; Precipitation, mixing, pressing; Operating conditions, Temperature: 350-420℃； Temperature: 250-290℃ ； Pressure: 25-32Mpa. Pressure: 5-15Mpa. Toxicity resistance and heat tolerance: Low sensitivity to toxins; can tolerate toxins such as H2S and As, as well as temperatures above 100°C. However, it is highly sensitive to extreme heat. Production capacity: Methanol yield per liter per catalyst hour – 1.2–1.6 to 1.5–2.5. Ratio of reaction gases CO/H2: 1/1.5 to 1/2.5, 1/3 to 1/5. Regeneration: Easy or difficult. Product quality: Many by-products are produced; the purity of impurities in the product is high. The composition of the product is complex, making it difficult to obtain high-purity methanol through distillation.
The preparation methods, heat resistance and toxicity resistance, operating conditions, and difficulty of regeneration all vary
This post was last edited by wjl7212 on 2020-6-22 09:09. 1) Zinc-based catalysts, copper-based catalysts – Preparation methods: precipitation, oxide mixing; precipitation, mixing, pressing into shape. 2) Operating conditions: Temperature for zinc-based catalysts: 350–420℃； Copper-based catalyst temperature: 250-290℃ ； Pressure for zinc-based catalyst: 25-32 Mpa; temperature and pressure for copper-based catalyst: 5-15 Mpa. 3) Toxicity resistance and heat resistance: Zinc-based catalysts have low sensitivity to toxins; they can tolerate toxins such as H2S and As. Copper-based catalysts, on the other hand, are highly sensitive to temperatures above 100°C and cannot withstand high temperatures. 4) Production capacity: For zinc-based catalysts, the ratio of methanol to CO is 1.2–1.6; the catalyst efficiency is 1.5–2.5 per hour. The ratio of H2 to CO in the reaction gas is 1/1.5 to 1/2.5, and 1/3 to 1/5 respectively. Zinc-based catalysts are easy to regenerate, while copper-based catalysts are difficult to regenerate.
The preparation methods, heat resistance and toxicity resistance, operating conditions, and difficulty of regeneration all vary
This post was last edited by wwguo on 2020-6-22 12:04. Answer: The list is as follows: Project; Zinc-based catalysts, Copper-based catalysts. Preparation methods: Precipitation, oxide mixing; Precipitation, mixing, pressing. Operating conditions: Temperature: 350-420℃； Temperature: 250-290℃ ； Pressure: 25-32Mpa. Pressure: 5-15Mpa. Toxicity resistance and heat tolerance: Low sensitivity to toxins; can tolerate toxins such as H2S and As, as well as temperatures above 100°C. However, it is highly sensitive to extreme heat. Production capacity: Methanol yield per liter per catalyst hour – 1.2–1.6 to 1.5–2.5. Ratio of reaction gases CO/H2: 1/1.5 to 1/2.5, 1/3 to 1/5. Regeneration: Easy or difficult. Product quality: Many by-products are produced; the purity of impurities in the product is high. The composition of the product is complex, making it difficult to obtain high-purity methanol through distillation.
The list is as follows: Item, Zinc-based catalyst, Copper-based catalyst; Preparation method, Precipitation, oxide mixing; Precipitation, mixing, pressing; Operating conditions, Temperature: 350-420℃； Temperature: 250-290℃ ； Pressure: 25-32Mpa. Pressure: 5-15Mpa. Toxicity resistance and heat tolerance: Low sensitivity to toxins; can tolerate toxins such as H2S and As, as well as temperatures above 100°C. Highly sensitive to excessive heat; cannot withstand high temperatures. Production capacity: Methanol yield per liter per catalyst hour – 1.2–1.6 to 1.5–2.5. Reaction gas ratio of CO to H2: 1/1.5 to 1/2.5, 1/3 to 1/5. Regeneration: Easy or difficult. Product quality: Many by-products; the purity of impurities in the product is high. The composition of the product is complex, making it difficult to obtain high-purity methanol through distillation
The preparation methods, heat resistance and toxicity resistance, operating conditions, and difficulty of regeneration all vary