甲烷氧化制合成气300m~3/d规模扩试

在自制催化剂上进行了甲烷氧化制合成气工艺 30 0m3 /d规模的扩大实验。实验表明在原料气中加入少量水蒸气抑制了反应初期表面Ni晶粒的烧结 ,尤其是抑制了床层上部催化剂Ni晶粒的烧结 ,提高催化剂活性 ,甲烷转化率、CO和H2 选择性分别可达到 94%～ 96 %、90 %～ 92 %、94%～ 99% ;在V(CH4 ) /V(O2 ) /V(H2 O) =1 90 / 1/ 0 2 2、干气空速 1 3× 10 5/h、310m3 /d规模 2 0 0h寿命实验中 ,甲烷转化率和CO选择性均大于 90 % ,而H2 选择性高达 99%以上 ,催化剂显示了较好的活性和稳定性 ;实验也表明在高密度放热状态下 ,甲烷催化部分氧化制合成气工艺具备可操作性和工业化潜力 ,但工艺参数的优化有赖于工程模型的建立 ,需要进一步的扩大实验。

Methane oxidation to syngas in the bench scale of 300m~3/d

Methane oxidation to syngas in the bench scale of 300m3/day was performed over the homely prepared catalyst. It was shown that vapor adding into the feedstock increased CH4 conversion via prohibiting the Ni sintering in the initial period of reaction caused by a lot of heat from methane oxidation to CO2 and H2O. 200 hours operation under the conditions of 1.3×105h－1 dry space velocity(CH4/O2/H2O ratio 1.90/1/0.22) and 50ml catalyst exhibited that CH4 conversion, CO and H2 selectivity were over 90%, 90% and 99% respectively, which shown that the homely prepared catalyst was highly active and stable and the steady running demonstrated that the process of methane oxidation to syngas was controllable and commercially valuable.