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对催化剂进行优选试验,选用Cu-Zn和Cu-Ni-K两种催化剂混合使用的方式。对两种催化剂的活性、选择性、耐高温性及抗氧化性进行了充分的试验。设计了适用的机载甲醇分解反应器。同时,在130单缸机上证实了柴油机掺烧改质甲醇的可行性。掺烧改质甲醇后,发动机的能耗率有较明显的降低。揭示了掺烧比对发动机能耗率、爆发压力、排温及着火落后期等的影响规律。认为,在低负荷时,甲醇掺饶比受发动机能耗率的限制;高负荷时,受发动机爆发压力的限制。并给出了不同工况点的最佳掺烧比。
The catalyst for the preferred test, the choice of Cu-Zn and Cu-Ni-K two kinds of mixed catalyst used. The two catalysts were tested for their activity, selectivity, temperature resistance and oxidation resistance. A suitable on-board methanolysis reactor was designed. In the meantime, the feasibility of diesel engine blending and reforming methanol was confirmed on 130 single cylinder machine. Addition of modified methanol, the engine’s energy consumption rate is significantly reduced. The effects of mixing ratio on the rate of energy consumption, the pressure at the explosion, the exhaust temperature and the lag phase of ignition were revealed. It is considered that at low load, methanol incorporation is limited by the rate of energy consumption of the engine; at high load, the pressure of engine explosion is limited. The optimum mixing ratio of different working conditions is given.