The effect of process parameters （pH, pulp density, inoculum volume, ferrous content, particle size） on the rate of copper solubilization was analyzed respectively through bioleaching tests with mixed bacteria in sh...The effect of process parameters （pH, pulp density, inoculum volume, ferrous content, particle size） on the rate of copper solubilization was analyzed respectively through bioleaching tests with mixed bacteria in shake flasks. These results show that the optimal process parameters are： pH, 1.50-1.80; pulp density, 5wt%; inoculum volume, 10vol%; ferrous content, 2g·L^-1; particle size, 〈0.076 mm. Furthermore, when the pH value is below 1.50 in leaching solution, the iron precipitated can be reduced to a great extent, but it shows low bacterial activity at this pH. Finally, it is emphasized that the optimal parameters are also determined by economical benefit.展开更多
This article investigates the influence of the property of VGO derived from the Kazakhstan-Russian mixed crude on the hydrocracking catalyst.The influence of reaction temperature,reaction pressure,space velocity and h...This article investigates the influence of the property of VGO derived from the Kazakhstan-Russian mixed crude on the hydrocracking catalyst.The influence of reaction temperature,reaction pressure,space velocity and hydrogen/oil ratio on the distribution and quality of products was analyzed with the optimal process regime determined,when the VGO was hydrocracked in the presence of the FC-16 catalyst.展开更多
基金This study is supported by the Educational Science Fund of Jiangxi Province, China (No.200202).
文摘The effect of process parameters （pH, pulp density, inoculum volume, ferrous content, particle size） on the rate of copper solubilization was analyzed respectively through bioleaching tests with mixed bacteria in shake flasks. These results show that the optimal process parameters are： pH, 1.50-1.80; pulp density, 5wt%; inoculum volume, 10vol%; ferrous content, 2g·L^-1; particle size, 〈0.076 mm. Furthermore, when the pH value is below 1.50 in leaching solution, the iron precipitated can be reduced to a great extent, but it shows low bacterial activity at this pH. Finally, it is emphasized that the optimal parameters are also determined by economical benefit.
文摘原油负压气提脱硫(稳定)工艺将产生大量含硫化氢的混烃,采用碱洗法除去混烃中的硫化氢将产生大量的碱渣,而碱渣处理成本较高,因此提出混烃气提脱硫稳定工艺,并采用Aspen HYSYS流程模拟软件对混烃气提脱硫稳定工艺参数进行模拟优化。分别考察了塔板数、回流比、塔操作压力、塔底温度及气提气量等对轻烃回收量、轻烃饱和蒸气压及硫化氢含量的影响,并优化出最佳的工艺参数:塔操作压力400 k Pa,塔底温度120℃,回流比2,塔板数10,气提气量500 m^3/d。在最佳工艺参数条件下,混烃气提脱硫后硫化氢质量分数由0.36%降低至几乎为0。该工艺具有更好的脱硫效果,并且无副产物,展现出良好的经济价值和可操作性,具有较好的推广性。
文摘This article investigates the influence of the property of VGO derived from the Kazakhstan-Russian mixed crude on the hydrocracking catalyst.The influence of reaction temperature,reaction pressure,space velocity and hydrogen/oil ratio on the distribution and quality of products was analyzed with the optimal process regime determined,when the VGO was hydrocracked in the presence of the FC-16 catalyst.
