摘要：AbstractThe purity of circulating hydrogen after desulfurization is mainly affected by the content of inert component methane. Based on this, the prediction method of methane content in circulating hydrogen after desulfurization is studied. From the process of hydrogen facing system, it can be seen that the methane content in circulating hydrogen after desulfurization is mainly affected by methane solubility, feed oil density, new hydrogen components, reaction temperature, hydrogen consumption per ton of oil and catalyst components. In the process of predicting the change of methane content in circulating hydrogen after desulfurization, the methane content in circulating hydrogen after desulfurization was detected under different working conditions (different influencing factors) by means of spectral absorption method and methane content detection device. According to the real-time test results, the influence of different working conditions on methane content in circulating hydrogen after desulfurization was obtained. Based on this, the change of methane content in circulating hydrogen after desulfurization was predicted under the fluctuating conditions of various influencing factors. The results show that the methane content in recycled hydrogen after desulfurization increases with the increase of methane content, reaction temperature and the addition of higher active catalyst in the reactor. When the density of feed oil is 892–909 kg/m3, the change of composition is small, which has little effect on the circulating hydrogen methane content after desulfurization.
