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Hui Wang - One of the best experts on this subject based on the ideXlab platform.

  • apparent kinetics of a gas liquid liquid system of bunsen reaction with iodine toluene solution for hydrogen production through h2s splitting Cycle
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Ji Li, Armin Moniri, Hui Wang
    Abstract:

    Abstract A Chemical splitting Cycle of H2S to produce H2 for sustainable oil sands bitumen upgrading was recently developed in our research group which includes three reactions (Wang, H. Hydrogen production from a Chemical Cycle of H2S splitting. International Journal of Hydrogen Energy 2007; 32:3907–14): H2S + H2SO4 → S + SO2 + 2H2O (H2S Oxidation) (1) 2H2O + I2+SO2 → H2SO4 + 2HI (Bunsen Reaction) (2) 2HI → H2 + I2 (HI decomposition) (3) With iodine provided by iodine-toluene solution, the Bunsen reaction can be conducted at room temperature. Compared with the General Atomics stoichiometry and operation condition for the sulfur–iodine Cycle, this modification can minimize or avoid problems such as side reactions, corrosion and iodine deposition. In addition, it reduces the unnecessary transportation of the excessive cycling agents in the Cycle. This work studies the apparent reaction rate of the Bunsen reaction in a gas–liquid–liquid multiphase system resulted from the presence of toluene in a closed, fixed-volume batch reactor using the initial rate analysis method. The reaction rate was found to be the first order with respect to SO2 and I2, respectively. The temperature effect on the reaction rate showed activation energy of 6.02 kJ/mol, which suggests that the rate-controlling step of the Bunsen reaction in the gas–liquid–liquid system is the step of SO2 absorption into the liquid phases. The variation of operating conditions including toluene/water volume ratio, agitation speed, and temperature confirmed the mass transfer rate-limiting step.

  • apparent kinetics of a gas liquid liquid system of bunsen reaction with iodine toluene solution for hydrogen production through h2s splitting Cycle
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Ji Li, Armin Moniri, Hui Wang
    Abstract:

    Abstract A Chemical splitting Cycle of H2S to produce H2 for sustainable oil sands bitumen upgrading was recently developed in our research group which includes three reactions (Wang, H. Hydrogen production from a Chemical Cycle of H2S splitting. International Journal of Hydrogen Energy 2007; 32:3907–14): H2S + H2SO4 → S + SO2 + 2H2O (H2S Oxidation) (1) 2H2O + I2+SO2 → H2SO4 + 2HI (Bunsen Reaction) (2) 2HI → H2 + I2 (HI decomposition) (3) With iodine provided by iodine-toluene solution, the Bunsen reaction can be conducted at room temperature. Compared with the General Atomics stoichiometry and operation condition for the sulfur–iodine Cycle, this modification can minimize or avoid problems such as side reactions, corrosion and iodine deposition. In addition, it reduces the unnecessary transportation of the excessive cycling agents in the Cycle. This work studies the apparent reaction rate of the Bunsen reaction in a gas–liquid–liquid multiphase system resulted from the presence of toluene in a closed, fixed-volume batch reactor using the initial rate analysis method. The reaction rate was found to be the first order with respect to SO2 and I2, respectively. The temperature effect on the reaction rate showed activation energy of 6.02 kJ/mol, which suggests that the rate-controlling step of the Bunsen reaction in the gas–liquid–liquid system is the step of SO2 absorption into the liquid phases. The variation of operating conditions including toluene/water volume ratio, agitation speed, and temperature confirmed the mass transfer rate-limiting step.

O Gileadi - One of the best experts on this subject based on the ideXlab platform.

  • insights into the recq helicase mechanism revealed by the structure of the helicase domain of human recql5
    Nucleic Acids Research, 2017
    Co-Authors: Joseph A Newman, Hazel Aitkenhead, P Savitsky, O Gileadi
    Abstract:

    : RecQ helicases are important maintainers of genome integrity with distinct roles in almost every cellular process requiring access to DNA. RECQL5 is one of five human RecQ proteins and is particularly versatile in this regard, forming protein complexes with a diverse set of cellular partners in order to coordinate its helicase activity to various processes including replication, recombination and DNA repair. In this study, we have determined crystal structures of the core helicase domain of RECQL5 both with and without the nucleotide ADP in two distinctly different ('Open' and 'Closed') conformations. Small angle X-ray scattering studies show that the 'Open' form of the protein predominates in solution and we discuss implications of this with regards to the RECQL5 mechanism and conformational changes. We have measured the ATPase, helicase and DNA binding properties of various RECQL5 constructs and variants and discuss the role of these regions and residues in the various RECQL5 activities. Finally, we have performed a systematic comparison of the RECQL5 structures with other RecQ family structures and based on these comparisons we have constructed a model for the mechano-Chemical Cycle of the common catalytic core of these helicases.

Ji Li - One of the best experts on this subject based on the ideXlab platform.

  • apparent kinetics of a gas liquid liquid system of bunsen reaction with iodine toluene solution for hydrogen production through h2s splitting Cycle
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Ji Li, Armin Moniri, Hui Wang
    Abstract:

    Abstract A Chemical splitting Cycle of H2S to produce H2 for sustainable oil sands bitumen upgrading was recently developed in our research group which includes three reactions (Wang, H. Hydrogen production from a Chemical Cycle of H2S splitting. International Journal of Hydrogen Energy 2007; 32:3907–14): H2S + H2SO4 → S + SO2 + 2H2O (H2S Oxidation) (1) 2H2O + I2+SO2 → H2SO4 + 2HI (Bunsen Reaction) (2) 2HI → H2 + I2 (HI decomposition) (3) With iodine provided by iodine-toluene solution, the Bunsen reaction can be conducted at room temperature. Compared with the General Atomics stoichiometry and operation condition for the sulfur–iodine Cycle, this modification can minimize or avoid problems such as side reactions, corrosion and iodine deposition. In addition, it reduces the unnecessary transportation of the excessive cycling agents in the Cycle. This work studies the apparent reaction rate of the Bunsen reaction in a gas–liquid–liquid multiphase system resulted from the presence of toluene in a closed, fixed-volume batch reactor using the initial rate analysis method. The reaction rate was found to be the first order with respect to SO2 and I2, respectively. The temperature effect on the reaction rate showed activation energy of 6.02 kJ/mol, which suggests that the rate-controlling step of the Bunsen reaction in the gas–liquid–liquid system is the step of SO2 absorption into the liquid phases. The variation of operating conditions including toluene/water volume ratio, agitation speed, and temperature confirmed the mass transfer rate-limiting step.

  • apparent kinetics of a gas liquid liquid system of bunsen reaction with iodine toluene solution for hydrogen production through h2s splitting Cycle
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Ji Li, Armin Moniri, Hui Wang
    Abstract:

    Abstract A Chemical splitting Cycle of H2S to produce H2 for sustainable oil sands bitumen upgrading was recently developed in our research group which includes three reactions (Wang, H. Hydrogen production from a Chemical Cycle of H2S splitting. International Journal of Hydrogen Energy 2007; 32:3907–14): H2S + H2SO4 → S + SO2 + 2H2O (H2S Oxidation) (1) 2H2O + I2+SO2 → H2SO4 + 2HI (Bunsen Reaction) (2) 2HI → H2 + I2 (HI decomposition) (3) With iodine provided by iodine-toluene solution, the Bunsen reaction can be conducted at room temperature. Compared with the General Atomics stoichiometry and operation condition for the sulfur–iodine Cycle, this modification can minimize or avoid problems such as side reactions, corrosion and iodine deposition. In addition, it reduces the unnecessary transportation of the excessive cycling agents in the Cycle. This work studies the apparent reaction rate of the Bunsen reaction in a gas–liquid–liquid multiphase system resulted from the presence of toluene in a closed, fixed-volume batch reactor using the initial rate analysis method. The reaction rate was found to be the first order with respect to SO2 and I2, respectively. The temperature effect on the reaction rate showed activation energy of 6.02 kJ/mol, which suggests that the rate-controlling step of the Bunsen reaction in the gas–liquid–liquid system is the step of SO2 absorption into the liquid phases. The variation of operating conditions including toluene/water volume ratio, agitation speed, and temperature confirmed the mass transfer rate-limiting step.

Armin Moniri - One of the best experts on this subject based on the ideXlab platform.

  • apparent kinetics of a gas liquid liquid system of bunsen reaction with iodine toluene solution for hydrogen production through h2s splitting Cycle
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Ji Li, Armin Moniri, Hui Wang
    Abstract:

    Abstract A Chemical splitting Cycle of H2S to produce H2 for sustainable oil sands bitumen upgrading was recently developed in our research group which includes three reactions (Wang, H. Hydrogen production from a Chemical Cycle of H2S splitting. International Journal of Hydrogen Energy 2007; 32:3907–14): H2S + H2SO4 → S + SO2 + 2H2O (H2S Oxidation) (1) 2H2O + I2+SO2 → H2SO4 + 2HI (Bunsen Reaction) (2) 2HI → H2 + I2 (HI decomposition) (3) With iodine provided by iodine-toluene solution, the Bunsen reaction can be conducted at room temperature. Compared with the General Atomics stoichiometry and operation condition for the sulfur–iodine Cycle, this modification can minimize or avoid problems such as side reactions, corrosion and iodine deposition. In addition, it reduces the unnecessary transportation of the excessive cycling agents in the Cycle. This work studies the apparent reaction rate of the Bunsen reaction in a gas–liquid–liquid multiphase system resulted from the presence of toluene in a closed, fixed-volume batch reactor using the initial rate analysis method. The reaction rate was found to be the first order with respect to SO2 and I2, respectively. The temperature effect on the reaction rate showed activation energy of 6.02 kJ/mol, which suggests that the rate-controlling step of the Bunsen reaction in the gas–liquid–liquid system is the step of SO2 absorption into the liquid phases. The variation of operating conditions including toluene/water volume ratio, agitation speed, and temperature confirmed the mass transfer rate-limiting step.

  • apparent kinetics of a gas liquid liquid system of bunsen reaction with iodine toluene solution for hydrogen production through h2s splitting Cycle
    International Journal of Hydrogen Energy, 2015
    Co-Authors: Ji Li, Armin Moniri, Hui Wang
    Abstract:

    Abstract A Chemical splitting Cycle of H2S to produce H2 for sustainable oil sands bitumen upgrading was recently developed in our research group which includes three reactions (Wang, H. Hydrogen production from a Chemical Cycle of H2S splitting. International Journal of Hydrogen Energy 2007; 32:3907–14): H2S + H2SO4 → S + SO2 + 2H2O (H2S Oxidation) (1) 2H2O + I2+SO2 → H2SO4 + 2HI (Bunsen Reaction) (2) 2HI → H2 + I2 (HI decomposition) (3) With iodine provided by iodine-toluene solution, the Bunsen reaction can be conducted at room temperature. Compared with the General Atomics stoichiometry and operation condition for the sulfur–iodine Cycle, this modification can minimize or avoid problems such as side reactions, corrosion and iodine deposition. In addition, it reduces the unnecessary transportation of the excessive cycling agents in the Cycle. This work studies the apparent reaction rate of the Bunsen reaction in a gas–liquid–liquid multiphase system resulted from the presence of toluene in a closed, fixed-volume batch reactor using the initial rate analysis method. The reaction rate was found to be the first order with respect to SO2 and I2, respectively. The temperature effect on the reaction rate showed activation energy of 6.02 kJ/mol, which suggests that the rate-controlling step of the Bunsen reaction in the gas–liquid–liquid system is the step of SO2 absorption into the liquid phases. The variation of operating conditions including toluene/water volume ratio, agitation speed, and temperature confirmed the mass transfer rate-limiting step.

Yu-jun Cui - One of the best experts on this subject based on the ideXlab platform.

  • Swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite under salinization-desalinization Cycle conditions
    Applied Clay Science, 2015
    Co-Authors: Y.g. Chen, Chunming Zhu, Qiong Wang, Yu-jun Cui
    Abstract:

    Compacted bentonite has been used as buffer material in radioactive waste disposal. Once compacted bentonite is emplaced, the Chemical composition of site water is changed due to the long-term interaction between the bentonite, surrounding rock and the concrete facility; therefore the hydraulic mechanical behavior of compacted bentonite should be evaluated for the disposal safety. In this study, the swelling pressure and hydraulic conductivity of compacted GMZ01 bentonite were investigated under salinization desalinization Chemical Cycles using a newly developed apparatus. Results show that the salinization process leads a reducing of swelling pressure and the desalination process leads to an increasing of swelling pressure; the hydraulic conductivity increases in the salinization process while decreases in the desalinization process. The variation magnitude of the swelling pressure and hydraulic conductivity is related to the solution concentration applied. Meanwhile, the initial Chemical condition and Chemical Cycle paths have a significant effect in the swelling characteristics and hydraulic properties. Since the salinization-desalinization Cycle is expected to occur over a long time during the operation of the repository, the monitoring of the buffer materials will be important for the disposal safety.