Beijing SJ Environmental Protection and New Material Co.

Beijing, China

Beijing SJ Environmental Protection and New Material Co.

Beijing, China
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Qi T.,Tsinghua University | Qi T.,Massachusetts Institute of Technology | Zhou L.,Tsinghua University | Zhang X.,Tsinghua University | Ren X.,Beijing SJ Environmental Protection and New Material Co.
Energy | Year: 2012

This paper describes the effect of the coal-to-liquids (CTL) industry on economic output and employment in four Chinese regions. The operation of CTL projects require large amount of expense and thus can largely boost regional economy growth by expanding local output demands. However, such economic benefit has never been quantified. In this paper, we evaluate the economic effects of CTL projects in regional China by performing a multiplier analysis with the latest 2007 China regional input-output data. Our analysis shows that CTL projects can greatly boost economic output and employment in regional China. A Direct Coal to Liquid (DCL) project that produces one million tons of fuel every year can increase regional economic output by 0.78%-2.76% and employment by 1.10%-3.15% annually. © 2012.


Zhang Y.,China University of Petroleum - Beijing | Zhang Y.,Beijing SJ Environmental Protection and New Material Co. | Liu Z.,Beijing SJ Environmental Protection and New Material Co. | Wang W.,China University of Petroleum - Beijing | And 2 more authors.
Fuel Processing Technology | Year: 2013

The gas-liquid-solid heterogeneous base-catalyzed oxidation of n-octane thiol and tert-butyl thiol by molecular oxygen was investigated. The activity and stability of MgO-supported NaOH and monometallic Cu, Ni as well as bimetallic Cu-Ni catalysts were studied. The catalysts were further characterized by XRD, FT-IR, XPS and EPR. Compared with commercial cobalt phthalocyanine catalyst (CoPc catalyst), the MgO-supported bimetallic Cu-Ni catalyst displayed an enhanced stability to the oxidation of iso-mercaptan, and the catalytic lifetime is 10 h longer than that of CoPc catalyst. It is found that the superoxide anions result from defects and small crystalline size play an important role in conversion of the iso-mercaptans, the more the lattice distortion, the higher the amount of surface adsorbed oxygen, the better was the performance of the sweeten-catalyst. Moreover, compared with commercial CoPc catalyst, the NaOH-rich catalyst is more resistant to deactivation of the oxidation of long chain thiol, and the catalytic lifetime is 26 h longer than that of CoPc catalyst. The superbasicity of the NaOH-rich catalyst is responsible for the formation of mercaptide ion, which is the rate-controlling step for the oxidation of long chain thiol. The mercaptans of different structures conform to different reaction mechanisms. © 2013 Elsevier B.V.


Zhang Y.,China University of Petroleum - Beijing | Zhang Y.,Beijing SJ Environmental Protection and New Material Co. | Liu Z.,Beijing SJ Environmental Protection and New Material Co. | Ren S.,China University of Petroleum - Beijing | And 2 more authors.
Applied Catalysis A: General | Year: 2014

It is a challenge to remove mercaptans as well as to keep octane value in clean gasoline production. In this work, gas-liquid-solid heterogeneous base-catalyzed oxidation of tert-butyl thiol by molecular oxygen was investigated. The reactivity and stability of modified MgO catalysts were studied. The catalysts were further characterized by XRD, FT-IR, CO 2-TPD, H2-TPD, O2-TPD and EPR. Compared with commercial cobalt phthalocyanine catalyst (CoPc catalyst), the modified MgO catalyst displayed an enhanced stability to the oxidation of tert-butyl thiol, and the catalytic lifetime is 10 h longer than that of CoPc catalyst at 3.0 h-1 of LHSV. It was found that the active sites of the catalysts are defects and basic centers. In addition, the basic sites responsible for the reactivity are mainly the medium and strong basic centers. It is interesting that the part of O3C2 - Mg3C2+ provides medium basic centers, however, the other part of it supplies as strong basic centers. It was demonstrated that superoxide anions O2- served as the active oxygen species. © 2014 Elsevier B.V.


Provided is a high-concentration carbonyl sulfide conversion-absorption type desulfurizer for use at medium-low temperature and preparation method thereof. The desulfurizer comprises 50%-75% magnetic iron oxide red (Fe_(21.333)O_(32)), 5%-10% alkali metal oxide (K_(2)O), 5-35% anatase TiO_(2), and 5-10% shaping binder. The method of preparing the desulfurizer comprises: uniformly mixing a metatitanic acid prepared using ferrous sulfate recycled as a by-product from titanium dioxide production with K_(2)CO_(3), calcining to activate at 500 C.-700 C., mixing with the magnetic iron oxide red and binder, roll molding at room temperature to form balls which are dried at 100 C.-150 C. to obtain the desulfurizer. The desulfurizer has a hydrolysis conversion of carbonyl sulfide higher than 99%, and has a higher sulfur capacity more than 25%.


Patent
Beijing Sj Environmental Protection And New Material Co. | Date: 2012-05-21

A method for preparing magnetic iron oxide Fe_(21333)O_(32), comprising the following steps: (1) preparing a ferrous salt solution with solid soluble ferrous salt; (2) preparing a hydroxide solution; (3) mixing said hydroxide solution and said ferrous salt solution in a co-current manner for reaction at an alkali ratio of 0.6-0.8 and a reaction temperature not exceeding 30 C.; (4) after the reaction in step (3) is finished, yielding a first mixture, then charging said first mixture with a gas containing oxygen for oxidation, and controlling the first mixture at a pH value of 6-8 until the oxidation is finished to yield a second mixture; (5) filtering, washing with water and drying said second mixture obtained in step (4) to yield a precursor; and (6) calcining the precursor obtained in step (5) at 250-400 C.


Patent
Beijing Sj Environmental Protection And New Material Co. | Date: 2014-12-22

The present invention relates to a novel use of magnetic iron oxide red Fe_(21.333)O_(32 )as a catalyst in oxidizing methanthiol to prepare dimethyl disulfide. The magnetic iron oxide red Fe_(21.333)O_(32 )according to the present invention has extremely high catalytic selectivity in catalyzing and oxidizing methanthiol to prepare dimethyl disulfide. The magnetic iron oxide red Fe_(21.333)O_(32 )is prepared with a carbonate and a ferrite as raw materials, has advantages of low cost and simple preparation process, and is suitable for industrial production.


Patent
Beijing Sj Environmental Protection And New Material Co. | Date: 2012-05-21

The present invention provides a process for preparing ball-type desulfurizer with high sulfur capacity, comprising the following steps: placing initial balls in a rolling equipment; wetting the surface of the initial balls with an aqueous solution of an organic binder; then alternately adding non-crystalline iron oxide hydroxide and the aqueous solution of the organic binder to gradually form small balls of non-crystalline iron oxide hydroxide with high sulfur capacity and different diameters; and adjusting the shape of the small balls and then roasting or naturally drying the small balls. In the desulfurizer prepared by this method, the initial balls constitutes 0.98 wt %-9.03 wt % of the desulfurizer, the non-crystalline iron oxide hydroxide constitutes 90.29 wt %-98.62 wt % of the desulfurizer, and the organic binder constitutes 0.58 wt %-0.89 wt % of the desulfurizer. The present invention solves the problems that the desulfurizer with high sulfur capacity in the prior art has a high binder content and poor water resistance and diffusion performance, and provides a process for preparing a desulfurizer with high sulfur capacity, wherein a desulfurizer with high sulfur capacity and low binder content, good water resistance, good diffusion performance can be prepared.


Patent
Beijing Sj Environmental Protection And New Material Co. | Date: 2012-05-21

A method for preparing amorphous iron oxide hydroxide, comprising following steps: (1) preparing a ferrous salt solution with solid soluble ferrous salt; (2) preparing a hydroxide solution; (3) mixing said hydroxide solution and said ferrous salt solution in a co-current manner for reaction at an alkali ratio of 0.60.8 and a reaction temperature not exceeding 30 C.; (4) after the reaction in step (3) is finished, yielding a first mixture, then charging said first mixture with a gas containing oxygen for oxidation, and controlling the first mixture at a pH value of 68 until the oxidation is finished to yield a second mixture; and (5) filtering, washing with water and drying said second mixture obtained in step (4) to yield the amorphous iron oxide hydroxide.


Provided is a preparation method of magnetic iron oxide Fe_(21.333)O_(32), comprising the following steps, preparing a solid green rust; and then calcining said solid green rust to obtain a magnetic iron oxide Fe_(21.333)O_(32). Also provided is the application of the magnetic iron oxide Fe_(21.333)O_(32 )as active materials of desulfurization at medium temperature. Also provided is a desulfurizer comprising the magnetic iron oxide Fe_(21.333)O_(32 )and the application thereof. The preparation method has simple steps and short production period.

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