检索结果-南通市图书馆

Pilot-scale acetone-butanol-ethanol fermentation from corn stover

在线全文

学校读者我要写书评

暂无评论

Green Carbon 2024年第1期2卷 81-93页

作者： Changsheng Su Di Cai Honggang Zhang Yilu Wu Yongjie Jiang Yicheng Liu Changwei Zhang Chunling Li Peiyong Qin tianwei tan National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029PR China College of Life Science and Technology Beijing University of Chemical TechnologyBeijing 100029PR China SDIC Advanced Biomass Fuel(Hailun)Co. LTDHeilongjiang 152300PR China

Biobutanol is an advanced biofuel that can be produced from excess lignocellulose via acetone-butanol-ethanol(ABE)*** significant technological progress has been made in this field,attempts at largescale lignocellulosic ABE production remain *** this study,1m^(3)scale ABE fermentation was investigated using high inhibitor tolerance Clostridium acetobutylicum ABE-P1201 and steam-exploded corn stover hydrolysate(SECSH).Before expanding the fermentation scale,the detoxification process for SECSH was simplified by process *** revealed that appropriate pH management during the fed-batch cultivation could largely decrease the inhibition of the toxic components in undetoxified SECSH to the solventogenesis phase of the ABE-P1201 strains,avoiding“acid crash”.Therefore,after naturalizing the pH by Ca(OH)_(2),the undetoxified SECSH,without removal of the solid components,reached 17.68±1.30 g/L of ABE production with 0.34±0.01 g/g of yield in 1 L scale *** on this strategy,the fermentation scale gradually expanded from laboratory-scale apparatus to pilot-scale ***,17.05±1.20 g/L of ABE titer and 0.32±0.01 g/g of ABE yield were realized in 1m3 bioreactor,corresponding to approximately 145 kg of ABE production from 1 t of dry corn *** pilot-scale ABE fermentation demonstrated excellent stability during repeated *** study provided a simplified ABE fermentation strategy and verified the feasibility of the pilot process,providing tremendous significance and a solid foundation for the future industrialization of second-generation ABE plants.

关键词： Corn stover ABE fermentation Pilot scale Steam explosion PH control

Functional characterization of a thermostable methionine adenosyltransferase from Thermus thermophilus HB27

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2016年第2期10卷 238-244页

作者： Yanhui Liu Biqiang Chen Zheng Wang Luo Liu tianwei tan Beijing Key Laboratory of Bioprocess Beijing University of Chemical Technology Beijing 100029 China

MATTt （a thermostable methionine adenosyl- transferase from Thermus thermophilus HB27） was over- expressed in Escherchia coli and purified using Ni-NTA affinity column. The enzymatic activity of MATTt was investigated in a temperature range from 30 ℃ to 90 ℃, showing that MATTt exhibited a high enzymatic activity and good thermostability at 80 ℃. Circular dichroism spectra reveals that MATTt contains high portion of β- sheet structures contributing to the thermostability of MATTt. The kinetic parameter, Km is 4.19 mmoFL and 1.2 mmol/L for ATP and methionine, respectively. MATTt exhibits the highest enzymatic activity at pH 8. Cobalt （Co^2＋） and zinc ion （Zn^2＋） enhances remarkably the activity of MATTt compared to the magnesium ion （Mg^2＋）. All these results indicated that the thermostable MATTt has great potential for industry applications.

关键词： ion-preference methionine adenosyltransfer-ase secondary structure thermostability Thermus thermo-philus

Environmental and economic assessment of vegetable oil production using membrane separation and vapor recompression

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2017年第2期11卷 166-176页

作者： Weibin Kong Qi Miao Peiyong Qin Jan Baeyens tianwei tan Beijing Key Lab of Bioprocess College of Life Science and Technology Beijing University of Chemical Technology Beijing 100029 China School of Engineering University of Warwick Coventry CV4 7AL UK

Solvent extraction of crude oil from oilseeds is widely applied for its high production capacity and low cost. In this process, solvent recovery and tail gas treatment are usually performed by adsorption, paraffin scrubbing, or even cryogenics （at low tail gas flow rates）. Membrane separation, which has a lower energy consumption than these techniques, spans a broad range of admissible concentrations and flow rates, and is moreover easily combined with other techniques. Vapor recompression has potentials to reduce the heat loss in association with distillation and evaporation. In this study, we proved the possibility of combining membrane separation and vapor recompression to improve the conventional vegetable oil production, by both experiments and process simulation. Nearly 73% of energy can be saved in the process of vegetable oil extraction by the novel processing approach. By further environmental assessment, several impact categories show that the optimized process is environmentally sustainable.

关键词： vegetable oil solvent-extraction membrane separation vapor recompression environmental and economic assessment

Facile biphasic catalytic process for conversion of monoterpenoids to tricyclic hydrocarbon biofuels

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2020年第10期29卷 42-50页

作者： Shaoqu Xie Trong HHuynh Peiyong Qin tianwei tan Hongfei Lin The Gene and Linda Voiland School of Chemical Engineering and Bioengineering Washington State UniversityPullmanWA 99164 National Energy Research and Development Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029China

Terpenoids have drawn much attention to scientists in synthesizing high-performance bio-jet fuels due to their ring structures,which feature potential high ***,a facile biphasic catalytic process has been developed for the production of high-density tricyclic hydrocarbon biofuels from a monoterpenoid,1,8-cineole,using sulfuric acid(H2SO4)as the homogeneous catalyst.A^100%conversion of 1,8-cineole and a>40%carbon yield of cyclic dimers were achieved at 100℃within two *** mechanism for the acid-catalyzed conversion of 1,8-cineole to cyclic hydrocarbon dimers were *** particular,the formation of the diene intermediates and the following dimerization of dienes was essential to synthesize tricyclic terpene *** biphasic catalytic process accelerated the deoxygenation rate and enabled the dimerization with the aid of organic solvent while controlling the reaction rates to avoid the formation of solid ***,this process also facilitated the product separation by organic solvent extraction while enabling easy recycle of the homogenous catalysts.

关键词： Cineole High-density biofuels Biphasic catalytic process Diels-Alder reaction Dehydration

生物基对二甲苯:低廉木质纤维素通往绿色聚酯的桥梁

在线全文

学校读者我要写书评

暂无评论

石油炼制与化工 2024年第1期55卷 28-41页

作者：储昊东冯心强宋建婷李梦迪申春谭天伟北京化工大学生命科学与技术学院国家能源生物炼制研发中心北京100029

对二甲苯(PX)是我国聚酯产业的龙头原料和化工产业的重要大宗产品,其主要用途是用于聚对苯二甲酸乙二醇酯(PET)的生产。随着我国“双碳”战略的普及,化学品制造业的原料逐渐从不可再生资源(石油、煤炭)向可再生资源转型。以木质纤维素... 详细信息

对二甲苯(PX)是我国聚酯产业的龙头原料和化工产业的重要大宗产品,其主要用途是用于聚对苯二甲酸乙二醇酯(PET)的生产。随着我国“双碳”战略的普及,化学品制造业的原料逐渐从不可再生资源(石油、煤炭)向可再生资源转型。以木质纤维素生物质为原料生产生物基PX的工艺开发,既促进了木质纤维素这一可再生资源的综合利用,又推动了PET聚酯单体绿色低碳制造的发展。基于此,综述了多种制备生物基PX的工艺路线研究现状,对比分析了其优劣势。结合工艺流程模拟和经济性分析,指出生物基PX工艺存在生产成本高、产能较低等问题,并初步提出了解决这些问题的主要思路。

关键词：木质纤维素生物质对二甲苯可再生聚酯

Green biomanufacturing promoted by automatic retrobiosynthesis planning and computational enzyme design

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第1期35卷 6-21页

作者： Ziheng Cui Shiding Zhang Shengyu Zhang Biqiang Chen Yushan Zhu tianwei tan National Energy R&D Center for Biorefinery College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China

Biomanufacturing,which uses renewable resources as raw materials and uses biological processes to produce energy and chemicals,has long been regarded as a production model that replaces the unsustainable fossil *** construction of non-natural and efficient biosynthesis routes of chemicals is an important goal of green *** methods that rely on experience are difficult to support the realization of this ***,with the rapid development of information technology,the intelligence of biomanufacturing has brought hope to achieve this *** and computational enzyme design,as two of the main technologies in intelligent biomanufacturing,have developed rapidly in recent years and have made great achievements and some representative works have demonstrated the great value that the integration of the two fields may *** achieve the final integration of the two fields,it is necessary to examine the information,methods and tools from a bird’s-eye view,and to find a feasible idea and solution for establishing a connection *** this purpose,this article briefly reviewed the main ideas,methods and tools of the two fields,and put forward views on how to achieve the integration of the two fields.

关键词： Biomanufacturing Retrobiosynthesis Computational enzyme design Biobased chemicals

Synthesis of micro/meso porous carbon for ultrahigh hydrogen adsorption using cross-linked polyaspartic acid

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2020年第5期14卷 857-867页

作者： Jun Wei Jianbo Zhao Di Cai Wenqiang Ren Hui Cao tianwei tan National Energy Research and Development Center for Biorefinery Beijing University of Chemical TechnologyBejing 100029China Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps College of Life SciencesTarim UniversityAlar 843300China Research Center for Eco-Environmental Sciences Chinese Academy of ScienceBejing 100085China

In addition to the specific surface area,surface topography and characteristics such as the pore size,pore size distribution,and micro/mesopores ratio are factors that determine the performance of porous carbons(PCs)in the fields of energy,catalysis,and *** on the mechanism of weight loss of polyaspartic acid at high temperatures,this study provided a new method for adjusting the surface morphology of PCs by changing the cross-linking ratio of the precursor,where cross-linked polyaspartic acid was used as precursor without additional activating agents.N2 adsorption analysis indicated that the specific surface area of the obtained PCs was as high as 1458 m2·g-1,of which I 200 m2·g-1was the contribution of the microporous area and the highest pore volume was 1.13 cm3·g-1,of which the micropore volume was 0.636cm3·*** thermogravimetric analysis results of the precursor,and also the scanning electron microscopy and Brunauer-Emmet-Teller analysis results of the carboniza-tion product confirmed that the prepared PCs presented multilevel pore structure,and the diameters of most pores were 0.78 and 3.97 nm;moreover,the pore size distribution was relatively *** conferred the PCs the ultrahigh hydrogen adsorption capacity of up to 4.52 wt-%at 77 K and 1.13 bar,in addition to their great energy storage and catalytic potental.

关键词： porous carbon multilevel pores polyaspartic acid cross-linking hydrogen adsorption

Mass and heat balance calculations and economic evaluation of an innovative biomass pyrolysis project

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2011年第3期5卷 355-361页

作者： Quanyuan WEI Yongshui QU tianwei tan Beijing University of Chemical Technology Beijing 100029China Beijing Municipal Research Institute of Environmental Protection Beijing 100037China

Biomass can be converted intoﬂammable gas,charcoal,wood vinegar,wood tar oil and noncombustible materials with thermo-chemical pyrolysis *** factors inﬂuence these processes,such as the properties of the raw materials,and temperature control and these will affect the products that are *** on the data from a straw pyrolysis demonstration project,the mass and heat balance of the biomass pyrolysis process were *** statistical product and service solutions(SPSS)statistical method was used to analyze the data which were monitored on-site.A cost-benefit analysis was then used to study the viability of commercializing the *** analysis included net present value,internal rate of return and investment payback *** results showed that the straw pyrolysis project has little risk,and will produce remarkable economic benefits.

关键词： mass balance heat balance biomass pyroly-sis economic benefit

Editorial for special issue on green biomanufacturing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Synthetic and Systems Biotechnology 2020年第4期5卷 361-362页

作者： Yongqin Lv Haijia Su tianwei tan Beijing Key Laboratory of Bioprocess College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing100029China

Green biomanufacturing refers to the use of industrial biotechnology for the advanced production of biofuels,bio-based chemicals,and *** involves the concepts of cleaner production and circular economy,and aims at sustainable developments with enhanced energy and environmental *** biomanufacturing is of great significance to the transformation and upgrading of traditional chemical *** past decade has witnessed the surge of new green biomanufacturing technologies such as innovation of industrial enzymes,construction of industrial strains,intelligent biomanufacturing processes and equipments,utilization of sustainable biomass,*** innovated techniques have led to intriguing applications in a diverse range of fields including biopharmaceuticals,energy,environment,textile,and so on.

关键词： sustainable witnessed chemicals