低污染型煤的研究

对低污染型煤进行了实验研究，得到了固硫效率与成型压力、脱硫剂、钙硫摩尔比的关系，同时发现固定碳燃烧的固硫效率比挥发分燃烧的固硫效率高许多。     

合成氨原料气NHD法脱硫脱碳装置

介绍了ＮＨＤ溶剂的工业应用特征及其应用于合成氨原料气脱硫脱碳装置的运行情况。     

铁水预处理脱硫剂的选择

对一些常用脱硫剂作热力学、动力学分析，根据脱硫剂的特点和经济效果等多方面的比较，认为采用Mg系复合脱硫剂较为理想。     

硫酸尾气处理技术现状与趋势

硫酸工业向大气排放的主要污染物是二氧化硫,随着《硫酸工业污染物排放标准》的颁布与实施,对硫酸尾气的排放限制要求更加严格。本文概述了硫酸尾气脱硫技术的原理及特点。详细介绍了目前技术最成熟、应用最广泛的是氨-酸法,分析了炭法和离子液法等烟气脱硫技术将会应用于硫酸尾气脱硫的前景。     

柱撑粘土在加氢脱硫中的应用研究

以柱撑粘土为载体,制备了Mo-Ni／A1-Fe-PILC和Mo—Ni／AbPILC加氢脱硫催化剂,在50m愀型固定床反应评价装置中对FCC汽油进行加氢脱硫研究。结果表明：Mo-Ni／A1-Fe-PILC和Mo-Ni／A1-PILC2种催化剂具有较好的加氢脱硫效果,脱硫率达到75％以上,最佳的工艺条件为反应温度340℃,反应压力6．0MPa,空速为4．0h-1。     

ON THE KINETICS BETWEEN COS AND HETEROCYCLIC AMINES IN AQUEOUS SOLUTIONS

The reaction kinetics between COS and aqueous solutions of some heterocyclic amines have been studied at 303 K. The reaction of COS with l,4-Diazabicyclo[2.2.2]oclane (DAB) and 1,2-Dimethylimidazole (DMI) has been investigated in an intensely stirred batch reactor; the reaction between COS and aqueous solutions of l,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) has been studied by means of the stirred cell technique. The reaction of COS with aqueous DMI and DAB was found to be extremely slow and the observed reaction order in the amine concentration was about 0·8. The overall reaction rate for the reaction of COS with aqueous DBU solutions was rather high, whereas the observed reaction order in the DBU concentration was found to be about 1·7.     

Gas desulphurization by sorption of SO2 on CuO/Al2O3 solid sorbent in a counterflow multistage fluidized bed reactor: Experimental analysis and modelling of the reactor

This paper gives a review of several works performed in the Laboratory of Chemical Engineering of Toulouse (France) on the desulphurization of gas mixtures by chemical sorption of sulphur dioxide on cupric oxide deposited on porous alumina particles in a counterflow multistage fluidized bed reactor. The first part of the paper presents experimental results concerning effects of gas and solids flow rates, hold up of solids in the reactor, temperature and concentrations of SO₂ and other gases (CO₂, H₂O and NO _x ). Desulphurization yields exceeding 90% were obtained using a four-stage reactor and sulphur dioxide content could be reduced from 3000 ppm to less than 300 ppm with a small gas pressure drop. The presence of other components in the flue gas led to slight changes in the desulphurization yield. This could be corrected by a better choice of the operating conditions. The second part of the article presents the modelling of the reactor by taking into account the residence time distribution of the solid particles through it. Comparison between the model predictions and experimental results showed that the assumptions of Davidson and Harrison are sophisticated enough to describe reactor operation under steady state conditions. This paper is dedicated to Dr L K Doraiswamy on his sixtieth birthday.     

循环流化床锅炉脱硫系统改造技术探讨

赤峰热电厂循环流化床锅炉脱硫系统经多次改造后,达到环保脱硫要求,文中通过实例,分析总结循环流化床锅炉的脱硫性能及脱硫设备的改进问题。     

Non-isothermal liquefaction of liptobiolith coal in supercritical water flow and effect of zinc additives

The liquefaction of liptobiolith coal in water vapor and supercritical water (SCW) flow at uniform increase in temperature from 300 up to 470 °C and in SCW flow at 400 °C (30 MPa) with addition of zinc shavings to coal has been investigated. Temperature dependences of the yield of liquid and volatile products and kinetic parameters of the process have been obtained. The yields of oil, resin, asphaltene and volatile products in relation to the coal organic matter (COM) are 23.2, 16.1, 5.1 and 14.1%, respectively. CO₂, CO, H₂S and C₁–C₄ alkanes prevail in the composition of volatile products. The generation of oil, resin and asphaltene are found to have occurred in terms of the simultaneous chemical reactions of cleavage of the COM aliphatic CC bonds, while the volatile products result from the consecutive transformations of the COM components in the bulk and SCW solution. Participation of H₂O molecules in thermochemical transformations of COM leads to increase in the oxygen amount in the conversion products and residue by 13.2%. Hydrogen and heat evolution during zinc oxidation by SCW provides for the hydrogenation of COM in situ. Addition of zinc to coal results in increase in the volatile products yield up to 48.6% and decrease in the conversion residue yield up to 20.8%. Under these conditions the yield of resin does not change, while the yields of oil and asphaltene decrease up to 21.2 and 2.5%, respectively. Based on the sulfur balance it is revealed that ≈40% of sulfur atoms pass into ZnS owing to the reactions of H₂S with Zn and ZnO resulting in the removal of H₂S from the volatile conversion products.     

COMPARATIVE STUDY BETWEEN THE KINETICS OF RETORTING OF OHIO ANO COLORADO SHALE

ABSTRACT

A comparative study between the kinetics of oil generation from Ohio and Colorado shales has been done. To facilitate comparison and to eliminate systematic errors, the same retorting system was used to study the kinetics of both Ohio and Colorado shales. Temperatures ranging to 923° K and nitrogen and carbon dioxide as sweep gases were used for this study. Both the isothermal and non-isothermal retorting techniques were employed for the kinetic measurement and the results obtained compared favorably with each other. The pyrolysis of Ohio shale was also found to comply with first order kinetics within the limits of experimental error. The study gave an apparent activation energy of 149.1 ± 2.8 KJ/mol for Ohio shale (25 cm³/kg) and 182.5 ± 3.5 KJ/mol for Colorado shale (110 cm³/kg).