Publications (Cited by EI)




55. Accession numbe 20124215572596
Gasoline desulfurization with two catalytic distillation columns
Adv. Mater. Res.
2012, 550-553,550-553
A new approach was proposed to remove sulfuric compounds from fluid catalytic cracking (FCC) gasoline by combining an alkylation desulfurization catalytic distillation (ADCD) column with a hydrodesulfurization catalytic distillation (HDS-CD) column. In the ADCD column, isobutylene (IB) and 3-methylthiophene (3MT) were designated as the model compounds for olefin and sulfide, respectively; NKC-9 cation exchange resin was used as the catalyst. In the HDS-CD column, dibenzothiophene (DBT) was chosen as the model sulfides; Nickel phosphide supported on the TiO2-Al2O3 composite oxide prepared by our laboratory were designated as the HDS catalyst. Simulations for these two CD columns were carried out by RADFRAC module of Aspen Plus. The optimization results revealed that the ADCD column had an alkylation selectivity of 96%, and the sulfur content in the overhead stream was less than 8 μg/g. The simulation results of the HDS-CD process showed that the sulfide in the bottom stream of ADCD column can be removed practically by 100% and the clean oil stream from the bottom of HDS-CD column has hardly any sulfur.
© (2012) Trans Tech Publications, Switzerland.
54. Accession numbe   20124215572510
Synthesis of ethylene carbonate from urea and ethylene glycol over La(NO3)3 Catalyst
Adv. Mater. Res. 2012, 550-553, 141-144; July 13, 2012 - July 15, 2012
Synthesis of ethylene carbonate (EC) from urea and ethylene glycol was investigated in a batch reactor using La(NO3)3 as catalyst. The reaction was performed under reduced pressure to remove the byproduct ammonia. The effect of various operation conditions such as reaction temperature reaction time and reaction pressure on the EC yield was explored. It was found that the reaction pressure is a key parameter for the formation of EC. At atmospheric pressure the reaction cannot happen. As the reaction pressure decreases the EC yield increases significantly. Under the optimum operation conditions which are reaction pressure 15 KPa reaction temperature 413 K reaction time 3 h and catalyst concentration 10 wt.% the EC yield can reach to 93%. © (2012) Trans Tech Publications Switzerland.
53. Accession number20113614310504
Reactivity and kinetics of bitumite and wheat straw blends during co-gasification
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University, 2011,45(8): 123-128
 To study the kinetics of coal and straw during co-gasification, Shenfu bitumite and wheat straw were blended in different ratios and then pyrolyzed to get blends char. The synergistic effect in the pyrolysis process of blends and the comparison of reactivity in the blends char-CO2 gasification process were investigated by TGA, and the kinetics of both processes was analyzed with Coats-Redfern method. The results show that the pyrolysis temperature of bitumite and wheat straw is different; Co-pyrolysis demonstrates two different stages coinciding with the individual pyrolysis characteristics of bitumite and wheat straw; the activation energies of pyrolysis of blends and bitumite are similar, which implies that there is no obvious synergistic effect in co-pyrolysis process; the comparison of reactivity of char-CO2 gasification is listed in reducing order: wheat straw char, blends char, bitumite char; the activity energies of co-gasification are lower than bitumite char, which means the addition of wheat straw promotes the char-CO2 gasification.
52Accession number 20113214227082
  Lanthanum modified catalyst for efficient supply of hydrogen through    dehydrogenation of organic chemical hydrides
     Advanced Materials Research2011287-2902110-2115
 Abstract: Dehydrogenation process of organic chemical hydrides was improved by modifying the catalyst of nickel-activated carbon (Ni/AC) with lanthanum (La). The catalysts were prepared in impregnation method with different amounts of La and Ni. The textural properties and morphology of catalyst were analyzed by nitrogen adsorption and transmission electron microscope equipped with energy dispersive spectrometer respectively. The effects such as metal content and granule size on the dehydrogenation of cyclohexane were investigated in fixed bed reactor. The results show that the metallic active components can be well dispersed on the support, and the elements analysis indicates the metal species tend to assemble on the surface layer rather than being distributed equally in the whole catalyst. The La modified catalyst LaNi/AC exhibited superior catalytic performance to Ni/AC and the conversion was 45% for LaNi/AC catalyst at 673K, while only 34 % for Ni/AC under the same conditions. © (2011) Trans Tech Publications. (13 refs.)

51. Accession number 20112414059145
Reactive distillation for tert-butyl alcohol dehydration with dynamic matrix control
Advanced Materials Research, 233-235(2011):1419-1422
 Reactive distillation for tert-butyl alcohol dehydration to isobutene and water catalyzed with the cation exchange resin was carried out. A mathematical model for simulating the process was developed and verified by the experimental results. Then, the dynamic matrix control (DMC) method was put into the process to achieve an efficient control for high purity isobutene from the top of the reactive distillation column. The tracking test and anti-disturbance test of the control system were carried out, and the effect of DMC parameters such as predictive length, control weighting matrix, error weighting matrix and reference trajectory coefficient on the performances of DMC were discussed. The results show that the tuning of these parameters has significant effect to the performances of DMC. © (2011) Trans Tech Publications, Switzerland