当前全球合成氨能力已达141Mt/a,年产120Mt/a。化肥催化剂涉及制氢、制氨、甲醇合成、硫酸及硝酸制造四个方面。全世界每年消费各种催化剂价值约56亿美元,也有人(1997年4月收到消息)估计1995年已达86亿美元,而化肥催化剂仅2亿美元,估计重量80～ At present, the global ammonia synthesis capacity has reached 141 Mt/a, with an annual output of 120 Mt/a. Fertilizer catalysts involve four aspects: hydrogen production, ammonia production, methanol synthesis, sulfuric acid and nitric acid production. The annual consumption of various catalysts in the world amounts to about US$5.6 billion, and others (received in April 1997) estimated that it has reached US$8.6 billion in 1995, while the fertilizer catalyst is only US$200 million and the estimated weight is 80