1. 概述 General Introduction

SCST-221型CO中（高）温变换催化剂用于天然气、炼厂气、焦炉气、高炉气等合成气制甲醇、制合成氨，制氢等装置中的一氧化碳变换反应。一氧化碳与水蒸气反应生成CO₂和H₂，使气体中一氧化碳（干气）小于3%，从而达到气体净化的目的。

High temperature CO shift catalyst SCST-221 is used for the system of ammonia, methanol, hydrogen plant of CO shift reaction, which use different raw materials such as natural gas, coke oven gas, oil field gas, naphtha and so on. The CO reacts with water vapor to produce H₂ and CO₂. The CO content in the out gas is lower than 3%.

主要反应如下：the main reactions are as following:

 CO+H₂O_（g）→CO₂+H₂+41.19 KJ/mol

2. 物化性能 Physical and Chemical Properties

可根据用户需要提供其他尺寸的催化剂。

Catalysts of other sizes can be supplied according to the needs of users.

3. 操作工艺条件Operation Conditions

4. 催化剂特性Product Advantages

1) 能适应低水碳比，达到节能降耗目的；

Suitable for low ratio of steam/carbon to achieve energy saving;

2) 抗水蒸气冷凝强，在使用过程中出现带液、带水的情况短时间对催化剂无影响；

Strong resistant to water vapor condensation: no effect on the catalyst in case of meeting  liquid water in short time;

3) 耐热性更强，特别是还原后的强度高于国内其他催化剂；

Higher strength and stronger heat resistance than others, especially after catalytic reduction;

4) 催化剂的活性组成是γ- Fe₂O₃，其晶相结构及活化能都优于α-Fe₂O₃，因此，该催化剂的低温活性及颗粒强度均优于其它同类产品；

The activity isγ- Fe₂O₃, which is better than theα-Fe₂O₃ at the crystal form and activity. So the activity and strength is better than other similar goods ;

5）催化剂的本体含硫一般都低于250ppm，开车时不需安排专门的放硫时间，升温还原结束放硫结束。

The sulfur content in the catalyst is less than 250 ppm and no need to release sulfur singly. It is accomplished when the catalyst reduction is over;