180×10^(4)t/a甲醇装置合成催化剂国产化应用探析

Study on domestic application of synthesis catalyst in a 180×10^(4) t/a methanol plant

国内大型甲醇装置主要采用国外甲醇合成工艺包和催化剂,不利于我国现代煤化工技术的长期稳定发展。中国神华煤制油化工有限公司首次在一个产能180×10^(4)t/a的甲醇装置中实现了国产甲醇合成催化剂的应用。对比分析了国外某甲醇合成催化剂(M催化剂)和国内某甲醇合成催化剂(C催化剂)的物化参数、升温还原过程及生产运行情况。结果表明,与M催化剂相比,C催化剂的优点在于活性高(尤其是低温活性突出)、稳定性强、气体单程转化率高,以及副产物和结蜡较少。此外,C催化剂较M催化剂具有更好的节能降耗效果,在设定条件(电价格0.3 CNY/(kW·h)、水价格0.15 CNY/t和蒸汽价格100 CNY/t)下,使用C催化剂可节约667.8×10^(4)CNY/a左右。目前,C催化剂在该装置中已稳定运行超过1年,装置生产负荷接近110%。

Domestic large methanol plants mainly use foreign methanol synthesis process packages and catalysts,which is not conducive to the long-term and stable development of modern coal chemical technology in China.China Shenhua Coal to Liquid Chemical Co.,Ltd.realized the application of domestic methanol synthesis catalyst in a methanol plant with productivity of 180×10^(4) t/a for the first time.The physicochemical parameters,heating reduction process and operation of a foreign methanol synthesis catalyst(M catalyst)and a domestic methanol synthesis catalyst(C catalyst)were compared and analyzed.The results show that compared with M catalyst,C catalyst has the advantages of high activity(especially low temperature activity),strong stability,high per pass conversion rates of gas,and less by-products and wax.In addition,C catalyst has a better energy saving effect than M catalyst,and under set up conditions(electricity price is 0.3 CNY/(kW·h),water price is 0.15 CNY/t and steam price is 100 CNY/t),using C catalyst can save about 667.8×10^(4) CNY/a.At present,C catalyst has been running stably in the plant for more than one year,and the production load of the plant is close to 110%.