Kushandiswa uye synthesis yeZSM-5 molecular sieve

I. Nhanganyaya

ZSM-5 molecular sieve imhando ye microporous material ine yakasarudzika dhizaini, iyo yakashandiswa zvakanyanya muminda yakawanda nekuda kweiyo yakanaka adsorption zvimiro, kugadzikana uye catalytic chiitiko. Mubepa rino, mashandisirwo uye kuumbwa kweZSM-5 molecular sieve ichaunzwa zvakadzama.

Chechipiri, kushandiswa kweZSM-5 molecular sieve

1. Catalyst: Nekuda kweiyo acidity yakakwira uye yakasarudzika pore chimiro cheZSM-5 molecular sieve, yakave yakanakisa inokonzeresa maitiro emakemikari akawanda, akadai seisomerization, alkylation, dehydration, nezvimwe.
2. Adsorbent: ZSM-5 molecular sieve ine yakakura pore volume uye yakanaka adsorption performance, uye inoshandiswa zvakanyanya mukuparadzanisa gasi, kuparadzaniswa kwemvura uye catalyst carrier uye mamwe minda.
3. Catalyst carrier: inogona kushandiswa sechinhu chinokonzera kutakura kuvandudza basa uye kugadzikana kwekugadzirisa.

Synthesis yeZSM-5 molecular sieve

Iyo synthesis yeZSM-5 molecular sieve inowanzo tora template nzira, iyo inodzora iyo synthesis maitiro nekudzora tembiricha, kudzvanywa, raw material ratio uye mamwe mamiriro. Pakati pavo, anonyanya kushandiswa mbishi zvinhu sodium silicate uye sodium aluminate.

1. Kudzora kwesilica-aluminium ratio: silica-aluminium ratio ndeimwe yezvipimo zvakakosha zveZSM-5 molecular sieve, iyo inogona kudzorwa nekugadzirisa chiyero che sodium silicate uye sodium aluminate. Iyo yakakwira reshiyo yesilicon kune aruminiyamu, iyo yakanyanya kurerekera chimiro cheiyo molecular sieve yakaumbwa ndeyesilicon, uye zvinopesana.
2. Synthesis tembiricha uye kumanikidza: synthesis tembiricha uye kumanikidza zvinhu zvakakoshawo zvinokanganisa kuumbwa kweZSM-5 molecular sieve. Kazhinji, kutonhora kwepamusoro uye kudzvinyirira kunobatsira pakuumbwa kweZSM-5 molecular sieves.
3. Crystallization nguva uye crystallization tembiricha: crystallization nguva uye crystallization tembiricha zvinhu zvinokosha zvinokanganisa maitiro ZSM-5 molecular sieve. Chiyero chekugadzira uye kuchena kweZSM-5 molecular sieve yakagadziridzwa nekuwedzera tembiricha yecrystallization panguva yakakodzera yekristaro.
4. Synthetic auxiliaries: Dzimwe nguva kuitira kugadzirisa pH kukosha kana kusimudzira crystallization process, zvinodikanwa kuwedzera mamwe maitiro ekugadzira, akadai seNaOH, NH4OH, nezvimwe.

Iv. Mhedziso

Seyakakosha microporous material, ZSM-5 molecular sieve ine yakafara application tarisiro. Izvo zvakakosha kuti unzwisise nzira yekubatanidza yekushandiswa kwayo kwakakura. Nekudzora mamiriro ekubatanidza, iyo pore chimiro, acidity uye catalytic zvimiro zveZSM-5 molecular sieve inogona kunyatsogadziriswa, iyo inopa mikana yakawanda yekushandisa kwayo munzvimbo dzakasiyana siyana.