炼焦煤尾煤催化热解制取富氢燃料气

以炼焦煤原煤、尾煤为研究对象，采用微量热重、常量固定床实验装置对其在热解过程中的质量变化和气相产物进行了对比分析。考察了温度、6种催化剂（CaO、MgO、Fe、Ni、NaOH、A1）及其添加比例对炼焦煤尾煤热解制取富氢燃料气的影响。结果表明，尾煤中富集的无机矿物质对热解制取富氢燃料气有促进作用，单位尾煤热解H2产率要比原煤高出1．93％。温度是影响尾煤热解产气的重要参数，热解终温的上升有利于H2产量的提高，随终温800℃升高到950℃H，产量增长了32．59mL／g。在催化热解实验中，除Al和MgO对尾煤热解有抑制作用外，CaO、Fe、Ni及NaOH均对尾煤热解产H2有促进作用，以CaO和Fe效果最为明显。并且不同添加比例的CaO和Fe对热解制取富氢燃料有一定的影响。

Catalytic pyrolysis of coking-coal tailings for production of hydrogen-rich fuel gas

Pyrolysis of a coking-coal and its tailings was carried out on a thermal gravimetric instrument and a fixed-bed reactor to investigate the weight change and gaseous products. The effects of temperature, six cata- lysts（CaO, MgO, Fe, Ni, NaOH and A1 ） and the proportion of added catalyst on the yields of components in gas product were investigated. Results show that inorganic minerals of tailings play an important role to promote the yield of H2 compared with coking-coal. Temperature also has a great impact on the yield of gas, a higher temperature will greatly promote the yield of H2. H2 yield increased by 32.59 mL/g when the temperature rose from 800℃ to 950℃. Catalysts play different roles during the process of pyrolysis. CaO, Fe, Ni and NaOH, es- pecially CaO and Fe, play a positive role in promoting the yield of H2 , While both A1 and MgO show an inhibi- tive effect during the process of pyrolysis. Moreover, the proportion of CaO to Fe has an impact on the production of hydrogen-rich gas.