Nanjing Tech University

Nanjing Gekof Institute of Environmental Protection Technology & Equipment Co., Ltd.

Jiangsu Deyitong Environmental Protection Technology Co., Ltd.

Nanjing Liyuan Environmental Protection Technology Co., Ltd.

Meng Xu

Haitao Xu

Mingbo Li

Jing Song

Wenyu Ji

Mutao Xu

Qijie Jin

Yanzhong Xu

Renyuan Chen

Dahua Liu

Yao Lu

Zhenshan Wu

A catalyst for inducing thermal desorption of organic matter-contaminated soil and a preparation method thereof, which uses a colloidal mixture of ferroferric oxide and ferric chloride as a catalytic active component of thermal desorption, and carbon tetrachloride as a solvent. Based on the mass of solvent, a mass percentage of catalytic active component is 0.1%-15%. Ammonia water is added dropwise to ferric chloride aqueous solution to react in oil bath to generate a ferroferric oxide colloidal solution, then ferric chloride and obtained ferroferric oxide colloidal solution are added to carbon tetrachloride, and mixed solution is continuously stirred in an oil bath to evaporate solvent water to prepare a catalyst with carbon tetrachloride as solvent. Catalyst is environmentally friendly and can induce thermal desorption of organic matters in soil. 100% desorption of chlorobenzene, o-xylene and benzo[A]anthracene can be achieved at 130° C., and energy consumption of thermal desorption is greatly reduced.

Catalyst for inducing thermal desorption of organic matter-contaminated soil and preparation method thereof

The present invention provides a catalyst for catalytic reduction of an industrial flue gas SOwith CO to prepare sulfur, a method for preparing the same and use thereof. A CeOnanocarrier is prepared by using a hydrothermal method, La and Y are loaded as active components, pre-sulfurization is conducted with 6% of SOand 3% of CO, and finally, the catalyst is prepared. The catalyst has high reactivity and sulfur selectivity and strong stability. The by-product sulfur generated by the reaction is recovered with a solvent CS, and the solvent CSis recovered by using a distillation process. The preparation method is low in cost, causes no secondary pollution and is high in sulfur recovery rate. The problem of low sulfur production in China at present is solved.

Catalyst for catalytic reduction of industrial flue gas SOwith CO to prepare sulfur, method for preparing same and use thereof

A system for resource recycling of sulfur dioxide includes a charcoal reduction furnace, a high temperature dust remover, a cooling separator A, a liquid sulfur tank, a cooling separator, a tail gas absorption tower, a gas stripping tower, a hypo reactor, a centrifuge, a mother liquor tank and a thickener. And a method for resource recycling of sulfur dioxide includes the following steps: (1) preparing elemental sulfur, (2) removing dust from a process gas containing gaseous sulfur, (3) separating elemental sulfur, (4) reabsorbing residual SOgas, (5) purifying sulfur powder, (6) preparing a slurry of cured hypo, (7) performing liquid-solid separation, and (8) preparing an absorption slurry. According to the method, SOgas is reduced into liquid sulfur and sulfur powder, and sodium thiosulfate is coproduced.

System and method for resource recycling of sulfur dioxide

Growing community of inventors

Nanjing, China

Meng Xu